Biodiversity Data Journal 13: e163127 doi: 10.3897/BDJ.13.e163127 Taxonomy & Inventories Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless weevil (Curculionidae, Entiminae, Pachyrhynchini) from the Aliwagwag Protected Landscape, Mindanao Island, Philippines Efrhain Loidge P. Pajota , Mark John T. Pepito , Rylle G. Añuber , Graden G. Obrial , Daven Jayson D. Agbas , Jhonnel P. Villegas , Milton Norman D. Medina , Analyn A. Cabras ‡ Institute for Biodiversity and Environment, Coleoptera Research Center, University of Mindanao, Davao City, Philippines § Philippine Coleopterists Society Incorporated, TroGenILab, Davao Oriental State University, City of Mati, Philippines | College of Teacher Education, University of Mindanao, Davao City, Philippines ¶ College of Arts and Sciences Education, Environmental Science Department, University of Mindanao, Davao City, Philippines # Faculty of Agriculture and Life Sciences, Biology Program, Davao Oriental State University, City of Mati, Philippines ¤ Faculty of Computing, Data Sciences, Engineering, and Technology, Information Technology Program, Davao Oriental State University, City of Mati, Philippines « Faculty of Teacher Education/ Center for Futures Thinking and Regenerative Development, Davao Oriental State University, City of Mati, Philippines » Department of Animal Science and Food Processing, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Praha - Suchdol, Czech Republic ˄ Faculty of Agriculture and Life Sciences, Tropical Genomics Laboratory, Davao Oriental State University, City of Mati, Philippines ˅ Faculty of Agriculture and Life Sciences, Terrestrial Invertebrate Research Laboratory, University Research Complex (UResCom), Davao Oriental State University, City of Mati, Philippines † Deceased author Corresponding author: Efrhain Loidge P. Pajota (
[email protected]) Academic editor: Li Ren Received: 25 Jun 2025 | Accepted: 03 Nov 2025 | Published: 18 Nov 2025 Citation: Pajota ELP, Pepito MJT, Añuber RG, Obrial GG, Agbas DJD, Villegas JP, Medina MND, Cabras AA (2025) Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless weevil (Curculionidae, Entiminae, Pachyrhynchini) from the Aliwagwag Protected Landscape, Mindanao Island, Philippines. Biodiversity Data Journal 13: e163127. https://doi.org/10.3897/BDJ.13.e163127 ZooBank: urn:lsid:zoobank.org:pub:DF5CDAF6-CE45-4949-B37A-2C2BB0415C8C ‡,§ |,‡,§ ¶,§ #,§ ¤,§ «,»,§ ˄,§ †,‡,˅,§ © Pajota E et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract Background The genus Metapocyrtus Heller, 1912, is the most speciose and taxonomically complex genus in the tribe Pachyrhynchini. Currently, the genus is comprised of more than 250 species that are classified into seven subgenera. One of the least studied subgenera under the genus Metapocyrtus is the subgenus Dolichocephalocyrtus Schultze, 1925, whose members are generally known for their long and slender rostrum (0.60 to 0.76 times as long as wide). Another distinct feature of this subgenus is the evident sexual dimorphism: males possess elytra with a rounded apex and a steep apical declivity, while females exhibit a sharply pointed, triangular projection at the elytral apex. Like most weevils under the genus Metapocyrtus, species under the subgenus Dolichocephalocyrtus have a narrow geographic range due to their flight inability; this is probably the reason why all known species under this subgenus are endemic to the Philippines. New information A new species of flightless weevil, belonging to the genus Metapocyrtus Heller, 1912, subgenus Dolichocephalocyrtus Schultze, 1925, from the Aliwagwag Protected Landscape (APL), Cateel, Davao Oriental, Mindanao, Philippines, is described and illustrated. Named after the Aliwagwag Falls, the novel species, Metapocyrtus (Dolichocephalocyrtus) aliwagwag Pajota & Cabras, sp. nov., is the first species of the genus to be formally described from Cateel, Davao Oriental. The description of this novel species adds to the rich diversity of the genus Metapocyrtus in the country and highlights the ecological significance of the Eastern Mindanao Biodiversity Corridor (EMBC). Keywords Eastern Mindanao Biodiversity Corridor, Philippine endemic, Pachyrhynchini, taxonomy, mimicry complex Introduction Metapocyrtus Heller, 1912 (Heller 1912) (Coleoptera, Curculionidae) is a genus of jewel weevil belonging to the subfamily Entiminae Schönherr, 1823 (Schönherr 1823), of the tribe Pachyrhynchini Schönherr, 1826 (Schönherr 1826). The members of this genus, similar to the other members of the tribe Pachyrhynchini, are generally flightless due to the absence of their membranous and metathoracic wings. They also inhabit a very narrow and specific geographic range due to their inability to fly (Cabras et al. 2021a). The genus has its centre of distribution in the Philippines, resulting in the majority of the 2Pajota E et al
species being endemic to the country. Notably, a few species of this genus have also been discovered in Japan and Orchid Island, Taiwan (Cabras et al. 2022), making it a non-country-specific group. Additionally, the combined anatomical characteristics of the rostrum, pronotum and body categorise the genus into seven subgenera, including Artapocyrtus Heller, 1912; Dolichocephalocyrtus Schultze, 1925; Metapocyrtus Heller, 1912, s. str.; Orthocyrtus Heller, 1912; Sclerocyrtus Heller, 1912; Sphenomorphoidea Heller, 1912; and Trachycyrtus Heller, 1912 (Heller 1912, Schultze 1925, Yap and Gapud 2007, Cabras et al. 2022b). Amongst the seven subgenera of the genus Metapocyrtus, the subgenus Dolichocephalocyrtus is one of the least-studied groups, as new members have only been discovered in the early years of the 21 century. For 86 years, this subgenus faced taxonomic inactivity as no new species were recorded since the description of M. (D.) duyagi Schultze, 1934 ( Schultze 1934). In 2020, the subgenus regained taxonomic momentum with the discovery of M. (D.) zamboanganus Cabras, Madjos & Medina, 2020, followed by five subsequent species: M. (D.) baulorum Cabras, Pajota & Medina, 2022; M.(D.) malindangensis Cabras, Pajota & Medina, 2022; M. (D.) kutongbusaw Pajota, Medina & Cabras, 2022; M. (D.) chloroglosus Rukmane–Bārbale, 2024; and M. (D.) agryoglosus Rukmane–Bārbale, 2024 (Cabras et al. 2020, Cabras et al. 2022a, Pajota et al. 2022, Rukmane-Bārbale 2024). Remarkably, four of these recently described species have been discovered in the southern part of the Philippines (Mindanao), highlighting the potential for more weevil species discoveries, primarily in the underexplored areas of the Eastern Mindanao Biodiversity Corridor (EMBC). Mindanao is one of the principal islands and the second-largest island in the Philippines, with a land area of 94,630 km . It is located in the southern part of the country and is home to a wide array of unique floral and faunal species occupying various habitat types (Pepito et al. 2020). The floral and faunal geographic and distributional range categorises the island into five sub-regions: Northeast Mindanao (Caraga Region), Central Mindanao, Western Mindanao (Zamboanga Peninsula), Southern Mindanao and Eastern Mindanao (Diesmos and Brown 2011). Several areas within these sub-regions remain entomologically underexplored, even amongst protected landscapes like the Aliwagwag Protected Landscape (APL), located in the Provinces of Davao Oriental and Davao de Oro. The APL was declared a Protected Area by Proclamation No. 139 in 2011 and is part of the Philippines’ National Integrated Protected Area System (NIPAS) and the Expanded National Integrated Protected Area System (E-NIPAS). This protected landscape blankets the upper Cateel River Basin of Mt. Agtuuganon and Mt. Pasian — a mountain complex listed as a Key Biodiversity Area (KBA) within the EMBC (Philippine Eagle Foundation et al. 2008). As a critical ecological sanctuary, the APL is open to local and foreign visitors (Mayuga 2021), offering activities such as swimming and trekking, which makes it highly susceptible to disturbance from anthropogenic activities. In this paper, a new species of flightless weevil, belonging to the genus Metapocyrtus subgenus Dolichocephalocyrtus from Aliwagwag Protected Landscape, Cateel, Mindanao, Philippines, is described and illustrated. Notes on its habitat, intraspecific st 2 Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless ... 3
variation of scale colouration and pattern amongst individuals and a proposed mimicry complex associated with the new species are also presented. Materials and methods Prior to the field expedition, a Wildlife Gratuitous Permit (No. XI-2023-31) was secured from the Department of Environment and Natural Resources (DENR) Region XI, and permission to conduct the study was granted by the Aliwagwag Protected Landscape Protected Area Management Board through Resolution No. 2, series of 2023. The specimens, currently deposited at the University of Mindanao Coleoptera Research Center (UMCRC), were collected opportunistically through bush beating and handpicking. The collected specimens were then stored in vials filled with 95% ethanol. The specimens were subsequently spread, air-dried for a few days and mounted on mounting cards with labels. Anatomical characters were observed under a Nikon SMZ745T stereomicroscope. The treatment of the genitals followed the protocol of Yoshitake (2011). Images of the habitus and genitalia were taken using a Canon EOS R10 digital camera, equipped with an MP-E 65-mm macro lens. All images were stacked using a Helicon Remote (Ver. 4.4.4 W), processed using a licensed version of Helicon Focus 6.7.0 and cleaned using Photoshop CS6 Portable software. Label data are indicated verbatim. Measurements in this paper are abbreviated as follows: • / = different lines; • // = different labels; •ā = arithmetic mean; •N = number of specimens in the type series; •LB = length of the body in dorsal view, from the anterior margin of the pronotum to the apices of the elytra; •LE = length of the elytra in dorsal view, from the level of the anterior margins to the apices of the elytra; •LP = length of the pronotum, from posterior to anterior margins along the mid-line; •LR = length of the rostrum; •WE = maximum width across the elytra; •WP = maximum width across the pronotum; •WR = maximum width across the rostrum. All measurements are in millimetres (mm). Comparative materials and specimens used in the study are deposited in the following institutions: •DGC - Daven Agbas and Graden Obrial Personal Collection, City of Mati, Philippines; •SMTD - Senckenberg Natural History Collections, Dresden, Germany; 4Pajota E et al
•UMCRC - University of Mindanao Coleoptera Research Center, Davao City, Philippines. Geospatial Analysis and Mapping In this study, we visualised and analysed distributional data of the new species and quantified the vegetation cover classes of Aliwagwag Protected Landscape to complement the information about the ecological status of the collection site. For the distribution map, the coordinates were gathered using the Garmin GPS Map 64x series, with a positional accuracy of ≤ 5 metres. In addition, vegetation cover was analysed using the Normalised Difference Vegetation Index (NDVI), which utilises satellite imagery with embedded spectral signature data. NDVI is a valuable index for assessing vegetation cover and its implications on the ecological status of the area. Typically, NDVI values range from -1 to +1, while, in the local study area, they vary between -0.15 and 0.53 (Khosravi et al. 2016). In this study, the satellite imagery was extracted from USGS.gov, provided by the Landsat 8 satellite with a Level 2 surface reflectance product. The downloaded data had already been atmospherically corrected to provide surface reflectance values. The satellite image was captured on 31 March 2020 and processed on 22 August 2020, using Collection 2, Tier 1 standards. This ensures that the data are of the highest quality and meet geometric and radiometric accuracy standards. To create the NDVI map, the following equation was used: NDVI = (NIR – VIS) / (NIR + VIS), where VIS and NIR represent the spectral reflectance measurements in the visible (red) and nearinfrared regions, respectively (Khosravi et al. 2016). Taxon treatment Metapocyrtus (Dolichocephalocyrtus) aliwagwag Pajota & Cabras, sp. nov. • ZooBank C270CA73-BEB2-4EA5-B713-31FFA473CE99 Materials Holotype: a. kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Coleoptera; family: Curculionidae; genus: Metapocyrtus; subgenus: Dolichocephalocyrtus; specificEpithet: aliwagwag; continent: Asia; island: Mindanao; country: Philippines; countryCode: PH; stateProvince: Davao Oriental; municipality: Cateel; locality: Aliwagwag Protected Landscape (APL); samplingProtocol: Handpicking; year: 2024; month: 7; day: 17-21; individualCount: 1; sex: Male; lifeStage: Adult; recordedBy: RG Añuber; identifiedBy: ELP Pajota; AA Cabras; institutionCode: UMCRC; occurrenceID: 8CF9E918DED4-5F19-8971-5587311C71E9 Paratypes: a. kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Coleoptera; family: Curculionidae; genus: Metapocyrtus; subgenus: Dolichocephalocyrtus; specificEpithet: aliwagwag; continent: Asia; island: Mindanao; country: Philippines; countryCode: PH; stateProvince: Davao Oriental; municipality: Cateel; locality: Aliwagwag Protected Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless ... 5
Landscape (APL); samplingProtocol: Handpicking; year: 2024; month: 7; day: 17-21; individualCount: 12; sex: 4 males, 8 females; lifeStage: Adult; recordedBy: RG Añuber; identifiedBy: ELP Pajota; AA Cabras; institutionCode: UMCRC; occurrenceID: F48700E9-A642-5AF2-8E24-D9449FE12469 b. kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Coleoptera; family: Curculionidae; genus: Metapocyrtus; subgenus: Dolichocephalocyrtus; specificEpithet: aliwagwag; continent: Asia; island: Mindanao; country: Philippines; stateProvince: Davao Oriental; municipality: Cateel; locality: Aliwagwag Protected Landscape (APL); samplingProtocol: Handpicking; year: 2024; month: 7; day: 17-21; individualCount: 4; sex: 2 males, 2 females; lifeStage: Adult; recordedBy: P Camposo; S Cadayona; identifiedBy: ELP Pajota; AA Cabras; institutionCode: UMCRC; occurrenceID: 37593EDF-415B-5130AB85-8B5B2CDD1CD9 c. kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Coleoptera; family: Curculionidae; genus: Metapocyrtus; subgenus: Dolichocephalocyrtus; specificEpithet: aliwagwag; continent: Asia; island: Mindanao; country: Philippines; stateProvince: Davao Oriental; municipality: Boston; locality: Barangay Simulao; samplingProtocol: Handpicking; year: 2024; month: 7; individualCount: 7; sex: 4 males, 3 females; lifeStage: Adult; recordedBy: GG Obrial; identifiedBy: GG Obrial; DJD Agbas; AA Cabras; ELP Pajota; institutionCode: DGC; occurrenceID: 61CDF402-B66F-5178-B36D-2004CAE92A5A d. kingdom: Animalia; phylum: Arthropoda; class: Insecta; order: Coleoptera; family: Curculionidae; genus: Metapocyrtus; subgenus: Dolichocephalocyrtus; specificEpithet: aliwagwag; continent: Asia; island: Mindanao; country: Philippines; stateProvince: Davao Oriental; municipality: Cateel; locality: Aliwagwag Protected Landscape (APL); samplingProtocol: Handpicking; year: 2024; month: 7; day: 17-19; individualCount: 22; sex: 15 males, 7 females; lifeStage: Adult; recordedBy: DJD Agbas; identifiedBy: GG Obrial; DJD Agbas; AA Cabras; ELP Pajota; institutionCode: DGC; occurrenceID: 2827321B-3E84-5F6C-8C78-DAC3B04244B6 Description Male. Dimensions: LR 1.75–2.5 (Holotype: 2.0; ā: 2.06). WR 1.0–1.2 (Holotype: 1.0; ā: 1.01). LP 2.0–3.0 (Holotype: 3.0; ā: 2.79). WP 2.5–3.5 (Holotype: 3.0; ā: 3.03). LE 5.0–6.0 (Holotype: 6.0; ā: 5.5). WE 3.0–4.0 (Holotype: 3.2; ā: 3.46). N = 25 for all measurements. Habitus as shown in Fig. 1 (A-F). Colouration: Integuments are all black, except proximal half of legs, reddish-brown. Body surface, rostrum, head, legs and ventral side moderately lustrous. Head: Dorsal surface finely rugose, except posterior third. Dorsal area between eyes sparsely pubescent with short sub-appressed white setae; densely beset with blue and black round and elliptical scales. Median furrow distinct, extending from apex of head to basal third, forming a vertex with transverse groove. Median furrow from posterior margin of eyes to basal third less distinct. Eyes moderately convex; area around eyes coarsely rugose. Lateroventral surface sparsely beset with short adpressed white setae and long adpressed piliform scales. 6Pajota E et al
Rostrum: Twice as long as wide (LR/WR: 2.0/1.00); overall surface punctate – with punctures finer at apical area and coarser at basal area; basal half coarsely rugose. Dorsum surface of apical half sparsely beset with short adpressed white setae; basal half surface densely beset with long sub-erected white setae. Apicad towards mandible beset with several long erected golden setae. Median furrow present; Vshaped ridge visible at basal half – forming a shallow depression. Metallic blue round and elliptical scales present at basal half – specifically at shallow depression formed in between V-shaped ridge towards transverse groove. Hump-like protuberance formed by V-shaped ridge at base of rostrum less prominent in males than in females. Lateroventral area between oblique furrow and antennal scrobe bulging; minutely pubescent with fine sub-adpressed white setae; area below antennal scrobe densely pubescent with long sub-adpressed blue and white setae. Antennae: Antennal scape slightly longer than funicle; reaching beyond posterior margin of eyes; densely beset with relatively long adpressed white setae. Funicle sparsely pubescent of long sub-adpressed white setae. Funicular antennomere 1 slightly longer than 2; approximately three times as long as wide. Funicular Figure 1. Habitus of M. (D.) aliwagwag Pajota & Cabras sp. nov.: A Male, dorsal view; B idem, lateral view; C idem, ventral view; D Female, dorsal view; E idem, lateral view; F idem, ventral view. Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless ... 7
antennomere 3 slightly longer than three succeeding antennomeres. Funicular antennomeres 4, 5 and 6 subglobular — nearly as long as wide. Funicular antennomere 7 longer than the last four antennomeres, narrow at base and wider at apex, resembling an inverted trapezoid. Club sub-ellipsoidal; widest at middle; approximately three times longer than wide; densely pubescent with sub-erect short brown setae. Prothorax subglobular; as long as wide (LP: 3.0; WP: 3.0); coarsely granulated, resembling a blackberry; mid-line groove distinct. Widest at middle, weakly convex, dorsal contour highest at posterior third. Pronotum having scaly markings of blue and black round and elliptical scales, arranged as follows: a) circular patch located at middle near dorsolateral margin, at each side of disc; b) longitudinal band of imbricate scales confluent to the band of scales at the anterior transverse groove. Dorsolateral area smooth; beset with fine white setae. Ventrolateral surface sparsely pubescent with short, adpressed white setae. Elytra subovate; longer than wide (LE: 6.0; WE: 3.2); slightly wider than prothorax (WE/WP: 3.2/3.0). Elytral surface irregularly striate-punctate, with some areas sparsely pubescent with very short white setae. Dorsum widest at middle; weakly convex, with abrupt apical declivity; dorsal contour highest at middle. Declivity densely beset with much longer sub-erected white setae. Each elytron with the following scaly marking of appressed metallic blue, teal and black round and elliptical scales: a) an interrupted anterior stripe of scales forming a subcircular anterior spot near elytral suture; and a dense strip of scales diagonally placed at dorsolateral surface; b) interrupted median transverse stripe widened laterally, forming another subcircular patch of scale near elytral suture; and a dense strip of scales extending through dorsolateral surface; c) thin, interrupted transverse band at the beginning of the apical declivity, composed of clustered elliptical scales; d) a small circular patch of scales at apex, adjacent to elytral suture. Legs with moderately clavate femora; basal third of femora reddish-brown, minutely pubescent with short adpressed white setae. Tibiae black, densely beset with moderately long gold and white setae; serrate along inner edges of basal third towards apex. Fore-tibiae mucronate at apex. Tarsomeres densely beset with long sub-adpressed white setae; ventrolateral area beset with longer erect brown and golden setae. Coxae beset with long sub-adpressed white setae. Pubescence in mesocoxae and metacoxae much denser than in the procoxae. Mesoventrite and metaventrite densely beset with long erected white setae; Mesoventrite prominently protruding at middle. Abdominal ventrite 1 weakly depressed towards metaventrite; densely covered with long sub-adpressed and erect fine white setae. Abdominal ventrite 3–5 sparsely covered with sub-adpressed fine white setae; abdominal ventrite 5 moderately rugo-punctate. Male genitalia and sternite IX are shown in Fig. 2A–C. 8Pajota E et al
Female. Dimensions: LR 1.9–2.0 (ā: 1.98). WR 1.0–1.2 (ā: 1.06). LP 2.0–3.0 (ā: 2.4). WP 3.0–4.0 (ā: 3.25). LE 6.0–7.5 (ā: 6.89). WE 3.5–5.0 (ā: 7.8). N = 20 for all measurements. Females (Figs. 1D–F) differ from males, based on the following characteristics: Rostrum with noticeably more distinct V-shaped ridge resulting in a much deeper medial depression; hump-like protuberance at base of the rostrum significantly more prominent. Relatively wider Prothorax, with presence of glabrous discal area free of granulations at middle of pronotum. Elytra clearly wider and longer; with a distinct sutural hump-like protuberance beset with erect setae at beginning of apical declivity similar to M. (D.) kutongbusaw Pajota, Medina & Cabras, 2022; however, unlike the latter, the projected inward curve is not as concave. Furthermore, the apex of elytra bears a triangular projection, a common sexual dimorphism characteristic within the subgenus. Lastly, the second series of type specimens collected from Barangay Simulao, Boston comprises several female individuals bearing green and yellow scales, rather than the predominantly blue scales observed in the holotype and paratypes from the APL, exhibiting intraspecific variation in scale colouration within the species. Diagnosis Metapocyrtus (Dolichocephalocyrtus) aliwagwag Pajota & Cabras sp. nov. belongs to the subgenus Dolichocephalocyrtus in having a long and slender rostrum, presence of a V-shaped ridge on the basal half of the rostrum and the sharp triangular projection at the elytral apex in females, as prescribed by Schultze (1923), Yap and Gapud (2007) and Cabras et al. (2022). The new species bears a close resemblance to Metapocyrtus (Dolichocephalocyrtus) baulorum Cabras, Pajota & Medina, 2022, Figure 2. Male genitalia of M. (D.) aliwagwag Pajota & Cabras sp. nov.: A Aedeagus in dorsal view; B idem in lateral view; C sternite IX in dorsal view. Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless ... 9
Acknowledgements This project is partly funded by the USAID INSPIRE Student Research Grant (INSPIRESRG-FY3-009) awarded to JP Villegas. We wish to acknowledge the Department of Environment and Natural Resources Regional Office XI (DENR XI) for issuing Wildlife Gratuitous Permit No. XI-2023-31 and the Aliwagwag Protected Landscape Protected Area Management Board for the permit to conduct a study through Resolution No. 2 series 2023. Additionally, we thank the Community Environment and Natural Resources Office (CENRO) in Baganga for assisting the research team with project implementation. We recognise the support and assistance of Amy G. Ponce, Jaranilla G. Tenorio, Ruben T. Teneza Jr., Roland O. Aguimlod, Christian Lloyd A. Jarencio, Nheñalyn B. Bautista, Lessa Vitor and all the park rangers of APL. The lead author also wishes to extend his sincere gratitude to the University of Mindanao and to Dr. Maria Linda B. Arquiza, Vice President for Research and Dr. Charlyn T. Gorgonio, Director of the Institute for Biodiversity and Environment (IBE) at the University’s Research and Innovation Center (UM-RIC), for their unwavering support of the Coleoptera Research Center’s research endeavours. Lastly, the publication of this paper is in honour of the memory of the senior author, AA Cabras, whose scientific contributions significantly propelled the advancement of Coleoptera taxonomy and systematics in the country. References • Agbas D, Obrial G, Cabras A (2024) Two new flightless weevils in the genus Metapocyrtus Heller (Coleoptera, Curculionidae, Entiminae) from Mt. Candalaga, Davao de Oro, Mindanao Island, Philippines. Baltic Journal of Coleopterology 24: 251‑265. https://doi.org/10.59893/bjc.24(2).014 • Cabras A, Bollino M, Medina M (2018) A new species of the subgenus Orthocyrtus, genus Metapocyrtus (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini) from Mindanao, with notes on its ecology. Baltic Journal of Coleopterology 18 (1): 39‑46. URL: https:// bjc.sggw.edu.pl/article/view/6286 • Cabras A, Madjos G, Medina MN (2020) A new Metapocyrtus Heller, 1912 (Curculionidae: Entiminae: Pachyrhynchini) from Zamboanga Peninsula, Mindanao Island, Philippines. Journal of Tropical Coleopterology 1 (2): 12‑20. • Cabras A, Medina MN, Bollino M (2021a) Two new species of the genus Metapocyrtus Heller, 1912 (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini), subgenus Orthocyrtus Heller, 1912, from Mindanao Island, Philippines. ZooKeys 1029: 139‑154. https://doi.org/10.3897/zookeys.1029.63023 • Cabras A, Medina M, Villanueva R (2021b) Two new species of Metapocyrtus Heller, 1912 (Coleoptera: Curculionidae: Entiminae: Pachyrhynchini) from Davao de Oro Mindanao Island, Philippines. Baltic Journal of Coleopterology 21 (1): 95‑103. URL: https:// bjc.sggw.edu.pl/article/view/6216 • Cabras A, Villanueva RJ, Medina MN (2021c) Two new species of Metapocyrtus Heller, 1912 (Coleoptera: Curculionidae: Entiminae: Pachyrhynchini) from Davao de Oro Mindanao Island, Philippines. Baltic Journal of Coleopterology 21 (1): 95‑103. URL: https://www.researchgate.net/publication/355874155_Two_New_Species_of_ 16 Pajota E et al
Metapocyrtus_Heller_1912_Coleoptera_Curculionidae_Entiminae_Pachyrhynchini_ from_Davao_de_Oro_Mindanao_Island_Philippines • Cabras A, Pajota EL, Rivera R, Medina MN (2022a) Two new species of the genus Metapocyrtus Heller, 1912, subgenus Dolichocephalocyrtus Schultze 1925 (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini) from Northern Mindanao, Philippines. Acta Biologica Universitatis Daugavpiliensis 22: 113‑123. • Cabras A, Medina M, Torrejos C, Pajota EL, Pepito MJ, Ceballos R, Susulan T, Rukmane A (2022b) Annotated list of Pachyrhynchini (Coleoptera, Curculionidae, Entiminae) in Davao City, Mindanao, Philippines. Check List 18 (4): 799‑814. https://doi.org/ 10.15560/18.4.799 • Diesmos A, Brown R (2011) Diversity, biogeography and conservation of Philippine amphibians. Biology and Conservation of Tropical Asian Amphibians26‑49. URL: https:// animorepository.dlsu.edu.ph/faculty_research/4878 • Heller KM (1912) Philippinische Rüsselkäfer. Philippine Journal of Science 7 (5): 295‑403. • Khosravi K, Nohani E, Maroufinia E, Pourghasemi HR (2016) A GIS-based flood susceptibility assessment and its mapping in Iran: a comparison between frequency ratio and weights-of-evidence bivariate statistical models with multi-criteria decision-making technique. Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards 83 (2): 947‑987. https://doi.org/10.1007/s11069-016-2357-2 • Mayuga J (2021) DENR shifts to digital issuance of permits for wildlife trade | Jonathan L. Mayuga. Section: Economy. URL: https://businessmirror.com.ph/2021/12/09/denr-shiftsto-digital-issuance-of-permits-for-wildlife-trade/ • Obrial G, Agbas D, Medina M, Cabras A (2024) Three new mimetic weevils (Coleoptera, Curculionidae, Entiminae) from Mt. Candalaga, Davao de Oro, Mindanao Island, Philippines. Zootaxa 5541 (4): 438‑454. https://doi.org/10.11646/zootaxa.5541.4.2 • Pajota EL, Cudera R, Medina MN, Cabras A (2022) Metapocyrtus (Dolichocephalocyrtus) kutongbusaw sp. nov., a new flightless weevil from Lake Holon, South Cotabato, Mindanao, Philippines (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini). Journal of Tropical Coleopterology 3: 1‑9. • Pepito MJ, Torrejos C, Medina MN, Cabras A, Cudera R (2020) Preliminary list of Carabidae and Cicindelidae (Coleoptera) fauna in Lake Holon, T'boli, South Cotabato, Philippines. Journal of Tropical Coleopterology 1 (2): 35‑46. URL: https://www. researchgate.net/publication/348004181_Preliminary_List_of_Carabidae_and_ Cicindelidae_Coleoptera_Fauna_in_Lake_Holon_T'boli_South_Cotabato_Philippines • Philippine Eagle Foundation, Conservation International-Philippines, Department of Environment and Natural Resources, et al. (2008) The Eastern Mindanao Biodiversity Corridor Conservation Framework. Philippine Eagle Foundation, Conservation International–Philippines, and Department of Environment and Natural Resources. https:// doi.org/10.13140/RG.2.1.2885.6161 • Rukmane-Bārbale A (2024) Three new species of the genus Metapocyrtus Heller, 1912 (Curculionidae: Entiminae) from Negros Island, Philippines. Baltic Journal of Coleopterology 24 (2): 131‑139. URL: https://bjc.sggw.edu.pl/article/view/10207 • Schönherr CJ (1823) Curculionides [Tabula synoptica familiae Curculionidum]. Isis von Oken 1823: 1132‑1146. Metapocyrtus (Dolichocephalocyrtus) aliwagwag sp. nov., a new flightless ... 17
• Schönherr CJ (1826) Curculionidum dispositio methodica cum generum characteribus, descriptionibus atque observationibus variis, seu Prodromus ad Synonymiam Insectorum. Partem IV. Fleischer, Leipzig, x + 338 pp. pp. • Schultze W (1923) A monograph of the pachyrrhynchid group of the Brachyderinae, Curculionidae: Part I. The genus Pachyrrhynchus Germar. Philippine Journal of Science 23: 609‑673. URL: http://archive.org/details/cbarchive_50447_amonographofthe pachyrrhynchidg1923 • Schultze W (1925) A monograph of the pachyrrhynchid group of the Brachyderinae, Curculionidae: Part III. the genera Apocyrtidius Heller and Metapocyrtus Heller. Philippine Journal of Science 26 (10): 131‑310. • Schultze W (1934) Thirteenth Contribution to the Coleoptera Fauna of the Philippines. Philippine Journal of Science 53: 311‑337. • Tseng H, Lin C, Hsu J, Pike D, Huang W (2014) The functional significance of aposematic signals: geographic variation in the responses of widespread lizard predators to colourful invertebrate prey. PLOS One 9 (3). https://doi.org/10.1371/journal.pone.0091777 • Wallace AR (1889) Darwinism: an exposition of the theory of natural selection, with some of its applications. Macmillan, London & New York. URL: http://archive.org/details/ darwinismexpositwall • Wang L, Huang W, Tang H, Huang L, Lin C (2018) Too hard to swallow: a secret secondary defence of an aposematic insect. Journal of Experimental Biology 221 (2). https://doi.org/10.1242/jeb.172486 • Waterhouse GR (1842) Descriptions of new species of coleopterous insects belonging to the genus Apocyrtus, collected by Hugh Cuming, Esq., in the Philippine Islands. Annals and Magazine of Natural History 9: 302‑311. https://doi.org/10.1080/03745484209445341 • Yap S, Gapud V (2007) Taxonomic review of the genus Metapocyrtus Heller (Coleoptera: Curculionidae: Entiminae). The Philippine Entomologist Volume 21 21: 115‑135. https:// doi.org/10.59852/TPE-A549V21I2 • Yoshitake H (2011) A new species of the subgenus Artapocyrtus of the genus Metapocyrtus (Coleoptera: Curculionidae: Entiminae) from Mindanao, the Philippines. ESAKIA 50: 115‑119. https://doi.org/10.5109/19404 18 Pajota E et al