NATURAL HISTORY · CATALOGUE RECORD
Black-bordered Rat Snake
Ptyas nigromarginata (Blyth, 1855)
Source-backed taxonomic record
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Open encyclopedia reference
Ptyas nigromarginata, commonly known as the green rat snake or black-bordered rat snake, is a species of snake in the family Colubridae. The species is endemic to parts of Southeast Asia, including regions of China, India, Myanmar, and Vietnam. This slender, agile snake is characterized by its striking green coloration, often accompanied by a distinctive black border along its dorsal scales.
Wikipedia contributors, Ptyas nigromarginata; see linked history · CC BY-SA 4.0 . Plain-text lead excerpt, at most 180 words; no infobox or later sections Retrieved 2026-10-05T10:49:19.413570+00:00. This reference remains separate from the taxonomic record.
Identity & source status
- Scientific name
- Ptyas nigromarginata (Blyth, 1855)
- Name authority
- (Blyth, 1855)
- Common name
- Black-bordered Rat Snake
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Squamata
- Family
- Colubridae
- Genus
- Ptyas
- Extinction status
- Not supplied by this source
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classReptilia Laurenti, 1768
- orderSquamata Oppel, 1811
- suborderSerpentes Linnaeus, 1758
- infraorderAlethinophidia Nopcsa, 1923
- familyColubridae
- subfamilyColubrinae
- genusPtyas
- speciesPtyas nigromarginata (Blyth, 1855)
Close classified relatives
These entries share the source’s genus, Ptyas. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Sulawesi Black RacerPtyas dipsas (Schlegel, 1837) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Brown Rat SnakePtyas fusca (Günther, 1858) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Chinese RatsnakePtyas korros (Schlegel, 1837) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Smooth-Scaled Mountain Rat SnakePtyas luzonensis (Günther, 1873) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Many-banded Green SnakePtyas multicincta (Roux, 1907) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Sakishima Green SnakePtyas herminae (Boettger, 1895) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Bach Ma green rat snakePtyas bachmaensis Nguyen, Vo, Orlov, Phan, Le, Nguyen, Tran, Murphy & Che, 2024 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Ptyas dhumnades (Cantor, 1842) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| DhamanPtyas mucosa (Linnaeus, 1758) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
Names & synonyms
Names explicitly linked to this accepted taxon in the source. Synonymy can change with revision.
| Recorded name | Source status |
|---|---|
| Coluber nigromarginatus Blyth, 1855 Blyth, 1855 | synonym |
Documented distribution
Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://reptile-database.reptarium.cz/species?genus=Ptyas&species=nigromarginata Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:4Q9PK. Classification follows source parent identifiers. English common names may vary by region.