Rhadinaea Onomastic: Annotated Etymology and Taxonomy of the Genus Rhadinaea

Onomastic of Rhadinaea Page | 1 ONOMASTIC OF SNAKE SPECIES SCIENTIFIC NAMES Snake species in the genus Rhadinaea Masud Salimian Morgan State university Overview The genus Rhadinaea comprises a large group of slender, graceful snakes belonging to the family Colubridae, specifically within the Dipsadinae subfamily (sometimes referred to as the "South American Colubrids"). They are commonly known as graceful brown snakes or forest snakes, characterized by their generally small to medium size, cryptic coloration, and often intricate head patterns, such as the vermiculate (wormlike) pattern seen in the type species, Rhadinaea vermiculaticeps. The genus was first established by Edward Drinker Cope in 1863, with Taeniophis vermiculaticeps (Cope, 1860) designated as the type species. Taxonomic work, including the foundational revision by Myers (1974), has been crucial, though recent molecular phylogenetics continue to refine the group's boundaries and interspecific relationships. Natural History Rhadinaea snakes are primarily diurnal or crepuscular, and their fossorial to semi-fossorial habits mean they are often found beneath leaf litter, logs, or stones in humid microhabitats. Their cryptic coloration—usually shades of brown, gray, or black, sometimes with longitudinal striping—provides excellent camouflage within the forest floor, where they hunt. Their diet typically consists of small, soft-bodied prey, including earthworms, slugs, insect larvae, small amphibians (especially frogs and salamanders), and sometimes small lizards or other small snakes. These snakes are non-venomous (though considered opisthoglyphous, see below) and rely on their speed and camouflage to avoid predators, which include birds of prey, other snakes, and mammalian carnivores. They play an important role in forest floor ecosystems as both predator and prey. Distribution & Natural Habitat The genus Rhadinaea has a wide geographical range spanning the Neotropics, from Mexico southward through Central America, reaching into northern South America (specifically Colombia and Panama). Their distribution is often fragmented, with many species being endemic to specific mountain ranges or highland forest patches, contributing to the genus's high species diversity. Their preferred habitat is typically Tropical Montane Rainforest and humid cloud forests, often at moderate to high elevations. The snakes exhibit a strong affinity for areas with abundant rainfall and high humidity, thriving in the cool, moist conditions characteristic of these high-elevation environments. This specialized habitat preference makes many Rhadinaea species vulnerable to deforestation and climate change. Reproduction & Sexual Dimorphism Reproduction in Rhadinaea is oviparous, meaning they reproduce by laying eggs. While specific reproductive details can vary among the numerous species, they generally lay small clutches of eggs in secluded, humid locations, such as under logs, in leaf litter, or within rotten wood. The breeding season often coincides with the onset of the rainy season to maximize the availability of Onomastic of Rhadinaea Page | 2 moisture for the developing eggs. Sexual dimorphism is typically subtle but present; females are often slightly larger and more robust than males, while males may have longer tails relative to their body length. The distinction is sometimes most reliably confirmed by examining subcaudal scale counts, which are usually higher in males, or by everting the hemipenes. Dentition & Hemipenial Morphology Rhadinaea snakes are classified as opisthoglyphous (rear-fanged) colubrids, though their dentition is generally not considered medically significant to humans. Their dentition consists of an uninterrupted row of maxillary teeth that gradually increase in size toward the posterior end of the jaw, culminating in one or more enlarged teeth positioned near the rear. These teeth are often grooved, which assists in channeling mild salivary secretions (sometimes referred to as venom) into their small prey. The hemipenes (copulatory organs of the male) are a critical feature used for species diagnosis and systematic study. They are typically simple or slightly bifurcated (forked), often possessing a pattern of spines, calyces (pockets), and sulcal grooves that are unique to different species groups within the genus, reflecting their evolutionary history. Scalation Scalation patterns are paramount in the classical taxonomy and identification of Rhadinaea species. Key scalation features include the number of rows of dorsal scales at midbody, which is typically smooth and arranged in 17 rows, but can vary. The condition of the anal plate (divided or single) and the number of paired subcaudal scales (under the tail) are also essential diagnostic features. Additionally, the arrangement of cephalic scales (those on the head), particularly the size and shape of the nasal, loreal, preocular, and postocular scales, provide critical data for distinguishing species. Variations in scalation often correlate with different ecological niches or phylogenetic groupings within the genus. Venom While Rhadinaea snakes are technically opisthoglyphous and possess mild salivary secretions, they are generally considered non-venomous in the sense of posing any danger to humans. The "venom" is a mild, proteinaceous saliva secreted by the Duvernoy's glands, and is primarily used to subdue their small, cold-blooded prey (such as frogs and lizards) after capture. Due to the position of the enlarged teeth at the back of the mouth, an effective bite that introduces the secretion is difficult to achieve on a large animal like a human. Bites from these snakes are rare and typically result in no more than local irritation or minor swelling, comparable to a mild scratch or bug bite, and are not medically significant. Historical Notes The systematic history of Rhadinaea began with its type species, Taeniophis vermiculaticeps, described by E. D. Cope in 1860. Cope later erected the genus Rhadinaea in 1863 to house this group of snakes, noting their slender form. The genus then accumulated various species through the work of early herpetologists, leading to considerable confusion until the definitive 1974 monograph by Charles W. Myers, which revised the systematics, recognized 39 species, and established the current framework. More recently, the advent of molecular phylogenetics, such as the 2021 study by García-Sotelo et al., has significantly impacted the field, suggesting that the genus may be paraphyletic and that some groups within Rhadinaea or closely related genera (like Taeniophallus) may need further systematic revision. Onomastic of Rhadinaea Page | 3 Genus Rhadinaea COPE, 1863 The genus name Rhadinaea is a morphology-based descriptor derived from the Ancient Greek feminine adjective rhadinē (ῥαδινή), meaning "slender," "delicate," or "supple." Cope adopted the term to describe the notably thin and graceful build of these snakes. Grammatically, the name is a Latinized feminine singular noun in the nominative case, which establishes the feminine gender for the genus. Grammar Notes: The change from rhadinē to Rhadinaea follows practices related to taxonomic nomenclature where Greek adjectives ending in -ē are typically Latinized into the first declension with an -a ending. The "ea" in Rhadinaea is a result of preserving the Greek phonetic structure while adding the standard feminine Latin ending -a. It essentially creates a Latinized feminine noun form. Edward Drinker Cope (July 1840 – April 1897) Onomastic of Rhadinaea Page | 4 Species Rhadinaea bogertorum MYERS, 1974 The specific epithet bogertorum is an eponymous descriptor. It is a patronymic epithet, a proper name Latinized and put into the genitive case. The suffix -orum is used for plural, it means if two or more people of the same name (couple, brothers, sisters, relatives) or "label" are honored together. The epithet honors esteemed American herpetologist Charles M. Bogert and his wife, Martha R. Bogert, who were instrumental in its discovery as they collected the only known specimens. Remarks: Charles Mitchill Bogert (1908–1992) was a highly influential curator and researcher at the American Museum of Natural History for decades, where he specialized in the systematics of reptiles and amphibians, famously pioneering the study of frog vocalizations and reptilian thermoregulation. The holotype (original specimen) for the Oaxacan graceful brown snake was collected by Martha R. Bogert in 1967 in the Sierra de Juarez, Oaxaca, Mexico, while Charles collected the paratype (additional specimen). Charles Bogert’s extensive field work, particularly in Mexico which included an extensive study of the Oaxaca region, resulted in numerous scientific contributions, and many other snake, lizard, and frog taxa are named in his honor. Rhadinaea bogertorum, Oaxacan Graceful Brown Snake - San Felipe Usila, Oaxaca, Mexico - Chris Gruenwald https://www.inaturalist.org/people/sonoran Creative Commons License Onomastic of Rhadinaea Page | 5 Rhadinaea calligaster (COPE, 1875) The species epithet calligaster is a color-based morphology noun. It is a compound Latinized noun made from Greek kállos (κάλλος) meaning "beauty," "elegance," or "nobility," and gastḗr (γαστήρ) meaning "belly," or "stomach," literally translating to "beautiful belly." It is referring to the snake's striking ventral coloration, yellow with a series of black crescents on the median front of each suture. Grammatically, the epithet calligaster functions as a noun in apposition. Publication Quote: "belly yellow, except a series of black crescents on the median front of each suture." Rhadinaea calligaster, Thick Graceful Brown Snake - San José Province, Pérez Zeledón, Costa Rica - EcoNaturalist.com https://www.inaturalist.org/people/econaturalistdotcom Creative Commons License Rhadinaea cuneata MYERS, 1974 The species epithet cuneata is a pattern-based morphology descriptor. It is the feminine form of cuneātus, meaning "wedge-shaped." It is the perfect passive participle of cuneō ("to wedge in.") The participial adjective (cune- + -ātus) refers to the postocular pale marking usually wedgeshaped, not a line or stripe, a key diagnostic feature of the species. Grammatically, cuneātus is a first/second-declension three-termination nominative singular adjective, agreeing in gender and case with the feminine genus Rhadinaea. Onomastic of Rhadinaea Page | 6 Rhadinaea cuneata, Veracruz Graceful Brown Snake - Tezonapa, Veracruz, México - Pedro E. Nahuat-Cervera https://www.inaturalist.org/people/pedro_nahuat Creative Commons License Rhadinaea decorata (GÜNTHER, 1858) The species epithet decorata is a morphology-based descriptor of pattern and color. It is the feminine form of decorātus, meaning "adorned," or "embellished." It is a nominative singular feminine adjective of the first/second-declension, three-termination from Latin adjective decorātus, the perfect passive participle of decorō ("to decorate," or "to embellish.") The participial adjective carries the sense of "adorned," "decorated," or "ornamented," referring to the snake’s highly ornate and striking coloration and patterning of the head of the species. Grammatically, decorata agrees in gender and case with the feminine genus Rhadinaea. Publication Quote: "Back greyish olive, the darker coloration of the sides well defined towards the back; a black streak through the eye; on both sides of the anterior part of trunk a bright yellow band, soon disappearing, beginning from the eye, but twice interrupted, so as to form a yellow spot behind the eye, and a second on each side of occiput." Rhadinaea flavilata (COPE, 1871) The specific epithet of flavilata is color-based morphology descriptor. It is the feminine form of the nominative compound Latin adjective flavilātus literally meaning "broad golden-brown colored," formed from the adjective fulvus ("tawny, or "yellowish-brown,") and the adjective lātus ("broad," "wide," or "extensive.") Grammatically, it is a first/second-declension threetermination nominative singular adjective, agreeing in gender and case with the feminine genus Onomastic of Rhadinaea Page | 7 Rhadinaea. The epithet refers to the rich golden brown dorsal color and specifically to the scales of the two inferior rows on each side that are broadly gold-edged. Publication Quote: "Color above, a rich golden brown, the scales of the two inferior rows on each side broadly gold-edged, the color of the back commencing on the third row. The ends of the scales of the vertebral row are sometimes darker-tipped." Grammar Notes: Reptile Database etymology section for the species states, "Named after Latin flavus, yellow, golden, gold colored + Latin latus, bring, bear. ["...Color above, a rich golden brown, the scales of the two inferior rows on each side broadly gold-edged..."]." The meaning mentioned for latus ("bring," or "bear,") is the least used meaning for latus and a common linguistic trap. Ironically, they follow this definition with the quote about the scales being "broadly gold-edged," which uses the word "broadly," the exact definition of the adjective lātus they just ignored. Some sources also suggest "yellow-sided" (from the third-declension noun latus, lateris), but given Cope's specific focus on the breadth of the gold edging, "broad" interpretation is the most faithful to the author's intent. Remarks: As mentioned in the Grammar Notes, the meaning of "to bear," or "to carry," is not a common interpretation for latus. In this case it is assumed that latus is the perfect passive participle of the verb ferre ("to bear.") The reason lātus looks nothing like ferre is due to a historical linguistic shift from the root. In Latin, the verb ferre ("to bear/carry") is notoriously irregular because it uses suppletion, meaning its different parts come from entirely different word roots. The actual root is tel- ("to lift or support"). The forms come from the Proto-Indo-European root telh-. The Old Latin form before it was lātus, the word was actually tlātus. Because the "tl-" sound was difficult for Latin speakers to pronounce at the start of a word, the "t" was eventually dropped, leaving only lātus. This same root (tel-) produced the Latin verb tollere ("to lift up") and its perfect form tulī. This explains why the third and fourth principal parts of ferre (tulī, lātus) share a hidden ancestry even though they look different from the present tense. Onomastic of Rhadinaea Page | 8 Rhadinaea flavilata, Pine Woods Littersnake - Hernando County, Florida - Ronald W Smith https://www.inaturalist.org/people/ron284 Creative Commons License Rhadinaea forbesi SMITH, 1942 The species epithet forbesi is an eponymous descriptor. It is a patronymic epithet, a proper name Latinized and put into the genitive case. The ending -i indicates that it honors a male individual. It honors Mr. Dyfrig McHatrie Forbes, who according to Smith "aided in the discovery of the type specimens, and who was responsible for a great share of our success in collecting in Veracruz and adjacent states." Dyfrig McHatrie Forbes (1901–1979) as the primary honoree was a prominent sugar planter at the Hacienda Potrero in Veracruz and a dedicated amateur herpetologist who hosted many famous researchers. Remarks: Reptile Database etymology section for the species states, "Named after Mr. and Mrs. Dyfrig Forbes who lived near Vera Cruz, Mexico as planters. Hobart Smith and his wife, Rozella, stayed with the Forbes while on honeymoon." While the information in the second sentence could be accurate, the first sentence identifying both Mr. and Mrs. Forbes as the honorees is inaccurate. The ending -i indicates that it honors a single male individual (ICZN Article 31.1.2). If the Smith's intention was to honor both husband and wife, he would have been an ending for plural people with the same last name, the suffix -orum, yielding forbesorum. The source of confusion may have come from another dedication by Smith. In 1955, Smith and van Gelder described Anolis forbesi and explicitly stated it was named for "Mr. and Mrs. Dyfrig Onomastic of Rhadinaea Page | 9 McH. Forbes". While the couple frequently hosted the Smiths, the 1942 snake description was formally dedicated only to the husband. Rhadinaea fulvivittis COPE, 1875 The specific epithet of fulvivittis is pattern-based morphology descriptor. It is a compound Latin adjective fulvivittis meaning "tawny-striped," formed from the adjective fulvus ("tawny, or "yellowish-brown,") and the noun vitta ("ribbon," or "band.") Grammatically, it is a thirddeclension two-termination nominative singular adjective, agreeing in gender and case with the feminine genus Rhadinaea. The epithet refers to the three brown bands extending from the end of the nose to near the end of the tail. Publication Quote: "Color above fulvous, below fulvous-yellow. The three brown bands extend from the end of the nose to near the end of the tail; the lateral involves the fourth and the half of each adjacent row of scales, and is black edged; the dorsal is three and two half scales wide, and is also black edged. The brown is paler on top of the head, and the ground color is a narrow yellow band to the eye." Grammar Notes: The formation of fulvivittis from its combining elements follows standard classical Latin practices. It combines the "color root fulv- + linking vowel -i- + noun root vitt- + adjectival suffix -is." One might also consider a superficial (but incorrect) formation of "color root fulv- + linking vowel -i- + noun vittīs," yielding a grammatical form of a noun in apposition. However, this in incorrect because in Latin, a noun in apposition must be in the nominative case, where vittis is the dative or ablative plural. These cases are not used for species epithets. If the author intended a noun in apposition meaning "stripe," they would have used the nominative singular vitta (e.g., Rhadinaea vitta) or the nominative plural vittae. Rhadinaea gaigeae BAILEY, 1937 The species epithet gaigeae is an eponymous descriptor. It is a matronymic epithet, a proper name Latinized and put into the genitive case. The ending -ae indicates that it honors a female individual. It honors distinguished American herpetologist Helen Beulah Thompson Gaige. Remarks: Helen Beulah Thompson Gaige (1890–1976) was a distinguished American herpetologist who was among the first professional women in her field in the United States. She held a long career at the Museum of Zoology at the University of Michigan, serving as an assistant curator and later curator of Amphibians, and specialized in Neotropical frogs. Gaige coauthored The Herpetology of Michigan in 1928, was editor-in-chief of the ichthyological and herpetological periodical Copeia starting in 1937, and was instrumental in organizing the American Society of Ichthyologists and Herpetologists (ASIH), where she was named honorary president in 1946. The ASIH currently honors her and her entomologist husband, Frederick McMahon Gaige, with the annual Gaige Fund Award, a monetary grant for graduate students in herpetology. Onomastic of Rhadinaea Page | 16 The species epithet taeniata is a pattern-based morphology descriptor. It is the feminine nominative singular form of the Latin adjective taeniātus meaning "striped," or "having stripes," derived from the Latin noun taenia ("ribbon," "stripe," or "band,") combined with adjectival suffix -ātus which denotes "provided with," or "characterized by." The epithet refers to the species’ dorsal striping, specifically the broad dark brown or black longitudinal band from the head to the tip of the tail, and two additional stipes on the sides of the species which run through the eyes. Grammatically, it is a first/second-declension nominative singular adjective, agreeing in gender and case with feminine genus Rhadinaea. Publication Quote: "Grundfarbe braun. Eine breite dunkelbraune oder schwarze Lingsbinde vom Kopf bis zum Schwanzende nimmt die drei mittlere und die Hilfte der beiden daran stofsendenSchuppenreihen ein, oder)’ sie wird aus drei Lingslinien zusammengesetzt, von denen die mittelste jederseits durch kleine helle schiefe Striche (den Randern der mittleren Schuppenreibe und den inneren Randern der daran stofsenden Schuppenreihen entsprechend) begrenzt wird; jederseits eine von einem schwarzen Querstrich des Rostrale ausgehende Langs binde, welche durch das Auge, langs der Kérperseite ebenfall bis zum Ende des Schwanzes verlauft, welche durch zwei halb oder eine ganze und zwei halbe Schuppenreihen von der Riicken-binde getrennt wird und entweder selbst nur zwei halb Schuppenreihen oder bis zur dritten Schuppenreihe herabsteigend zwei ganze und fast zwei halbe Schuppenreihcn einnimmt. Der braungelbe Streif, welcher die Riickenbinde yon der Seite trennt, beginnt an der Seite der Schnauze, wird durch das Auge unterbrochen und verlauft an der dufseren Seite de Parietalia. Hinten am dufseren Ende der Bauchschilder befindet sick ein schwarzer Punkt, wodurch auf der vorderen Hilfte des Bauche jederseits eine punktirte Linie gebildet wird." Translated as, "Ground color brown. A broad dark brown or black longitudinal band from the head to the tip of the tail occupies the three middle scale rows and half of the two adjacent rows, or it is composed of three longitudinal lines, the middle one of which is bordered on each side by small light oblique lines (corresponding to the edges of the middle scale row and the inner edges of the adjacent scale rows); on each side, a longitudinal band originating from a black transverse stripe on the rostral scale, which runs through the eye, along the side of the body, also to the end of the tail, which is separated from the dorsal band by two half or one whole and two half scale rows and either itself occupies only two half scale rows or, descending to the third scale row, occupies two whole and almost two half scale rows. The brownish-yellow stripe that separates the dorsal band from the side begins at the side of the snout, is interrupted by the eye, and runs along the outer side of the parietal scales. At the posterior end of the ventral scales, there is a black dot, which forms a dotted line on each side of the anterior half of the belly." Remarks: This epithet exemplifies descriptive Latin formation used to capture clear morphological traits. The distinct dorsal stripes are diagnostic, and the name directly encodes a visible character of taxonomic value. Such pattern-based adjectives are common when a species’ phenotypic features, especially stripes or coloration, serve as important identifiers. Onomastic of Rhadinaea Page | 17 Rhadinaea taeniata, Pine-Oak Snake - Minatitlán, Colima, México - Francisco J. Muñoz Nolasco https://www.inaturalist.org/people/franj36 Creative Commons License Rhadinaea vermiculaticeps (COPE, 1860) The species epithet vermiculaticeps is pattern-based morphology-based descriptor. It is a Latin compound adjective formed from the adjective vermiculātus ("vermiculated," or "patterned with worm-like lines,") itself derived from vermiculus ("a little worm,") and adjectival suffix -ātus for "provided with," or "having the nature of," combined with -ceps, a compositional derivative of caput ("head,") yielding "worm-patterned head." Grammatically, it is a third-declension onetermination compound adjective, agreeing in gender and case with the feminine genus Rhadinaea. The epithet refers specifically to the intricate, wavy color pattern on the head scales of the species. Publication Quote: "... The intermediate space is irregularly vermiculated with delicate marks of the same color ..." Grammar Notes: Instead of "It is a Latin compound adjective formed from the adjective vermiculatus..." we could have said, "It is a Latin compound adjective formed from Latin adjective vermiculātī, inflection of vermiculātus..." which is not incorrect. In Latin, vermiculātī is an inflected form (the masculine nominative plural or the genitive singular), while vermiculātus is the lemma (the dictionary headword or "root" form). In etymology, it is standard to refer to the nominative singular (vermiculātus) as the source, rather than a specific inflected form like vermiculātī, unless that specific inflection is what appears directly in the name. Another point is whether the "i" before the -ceps belongs to the previous element (like Onomastic of Rhadinaea Page | 18 vermiculātī) or it is a connecting -i- (like vermiculat- + -i- + -ceps). In here it is usually a linking vowel common in Latin compounding, rather than a specific case inflection of the first word. Again, we are correct to say that vermiculātī is an inflection of vermiculātus. However, by using the lemma (vermiculātus), we simply simplify the explanation to show the primary adjective being used to describe the "head" (-ceps). Subspecies Rhadinaea taeniata aemula BAILEY 1940 The subspecies epithet aemula is a morphology-based descriptor of resemblance. It is the nominative singular feminine Latin adjective aemulus, meaning "striving to equal or excel," or "rivaling." Grammatically, aemulus is a first/second-declension, three-termination adjective agreeing in gender and case with the feminine genus Rhadinaea. The epithet refers to xtraordinary resemblance of the species to Coniophanes piceivittis COPE, 1870. Myers' 1974 systematic work, states that Rhadinaea taeniata aemula "possibly evolved as a mimic of the opisthoglyphous Coniophanes piceivittis". Publication Quote: "The specific name refers to the extraordinary resemblance of this species to Coniophanes piceivittis Cope." * Selected Sources: 1. Cope, E.D. 1863. Descriptions of new American Squamata in the Museum of the Smtihsonian Institution. Proc. Acad. Nat. Sci. Philadelphia 15 [1863]: 100-106 https://www.biodiversitylibrary.org/page/1958370#page/107/mode/1up 2. Myers, C. W. (1974). The systematics of Rhadinaea (Colubridae), a genus of New World snakes. Bulletin of the American Museum of Natural History, 153(1), 1-262. https://digitallibrary.amnh.org/items/c648df01-5835-4672-8bf6-d04a9235bca5 3. García-Sotelo, U. A., García-Vázquez, U. O., & Espinosa, D. (2021). Historical biogeography of the genus Rhadinaea (Squamata: Dipsadinae). Ecology and Evolution, 11(16), 12413–12428. https://www.researchgate.net/publication/353734686 4. Mata-Silva, V., Pineda-Arredondo, E., Figueroa, A., Smith, E. N., & Johnson, J. D. (2020). A partial molecular phylogeny of Rhadinaea and related genera (Squamata, Dipsadidae) with comments on the generic assignment of Rhadinaea eduardoi. ZooKeys, 945, 129–147. https://zookeys.pensoft.net/article/50738/ 5. Mata-Silva, V., Pineda-Arredondo, E., Smith, E. N., & Johnson, J. D. (2019). A new species of forest snake of the genus Rhadinaea from Tropical Montane Rainforest in the Sierra Madre del Sur of Oaxaca, Mexico (Squamata, Dipsadidae). ZooKeys, 813, 55–65. https://zookeys.pensoft.net/article/29617/ Onomastic of Rhadinaea Page | 19 6. García-Vázquez, U. O., Pavón-Vázquez, C. J., Blancas-Hernández, J. C., Blancas-Calva, E., & Centenero-Alcalá, E. (2018). A new rare species of the Rhadinaea decorata group from the Sierra Madre del Sur of Guerrero, Mexico (Squamata, Colubridae). ZooKeys, 780, 137–154. https://zookeys.pensoft.net/article/25593/ 7. Dunn, E. R. (1944). A revision of the Colombian snakes of the genera Leimadophis, Lygophis, Liophis, Rhadinaea, and Pliocercus, with a note on Colombian Coniophanes. Caldasia, 2(10), 479-495. https://sci-hub.se/10.2307/23640977 8. Bailey, Joseph R. 1940. The mexican snakes of the genus Rhadinaea. Occasional Papers of the Museum of Zoology, University of Michigan (412): 1-19 https://deepblue.lib.umich.edu/items/f9fe9441-08c6-4b18-bcf2-ffa311f46d20 9. Uetz, P., Freed, P, Aguilar, R., Reyes, F., Kudera, J. & Hošek, J. (eds.) (2025) The Reptile Database, http://www.reptile-database.org, accessed [November 2025] Acknowledgement In preparing this document, original publications (when available online) were consulted for detailed information on each species; the Reptile Database was used for lists of valid species and type localities; Wikipedia was referenced for historical data; and Wiktionary for Latin grammar and epithet formation. Two specific papers by Myers (1974) and Bailey (1940) which also included the etymology section for several Rhadinaea species helped in shaping this document. AI Tools Consulted: Generative AI tools, specifically Google's Gemini, were leveraged to assist with etymological, geographical, and historical research. Gemini was instrumental in clarifying complex Greek and Latin grammar and reconciling nomenclatural discrepancies between secondary databases and original descriptions. It provided deep-dive research into type localities, historical honoree biographies, and verified grammatical agreement in accordance with ICZN guidelines. All AI-assisted research was meticulously cross-referenced with primary literature, and full responsibility for the final accuracy and interpretation of the manuscript remains with the author. Online Versions: Facebook https://www.facebook.com/groups/etymologyofsnakes/posts/841875341957453 Author’s website https://salimian.webersedu.com/SNAKES/PDF/Salimian_Rhadinaea_Onomastic.pdf