The Sakishima green snake (''Ptyas herminae'') is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

snake Snakes are elongated limbless reptiles of the suborder Serpentes (). Cladistically squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales much like other members of the group. Many species of snakes have s ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Colubridae Colubridae (, commonly known as colubrids , from , 'snake') is a family of snakes. With 249 genera, it is the largest snake family. The earliest fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. C ...

. The species is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the

Yaeyama Islands The Yaeyama Islands (八重山列島 ''Yaeyama-rettō'', also 八重山諸島 ''Yaeyama-shotō'', Yaeyama: ''Yaima'', Yonaguni: ''Daama'', Okinawan: ''Yeema'', Northern Ryukyuan: ''Yapema'') are an archipelago in the southwest of Okinawa Pref ...

in the southern

Ryukyu Islands The , also known as the or the , are a chain of Japanese islands that stretch southwest from Kyushu to Geography of Taiwan, Taiwan: the Ryukyu Islands are divided into the Satsunan Islands (Ōsumi Islands, Ōsumi, Tokara Islands, Tokara and A ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

Etymology

The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''herminae'', is in honor of Boettger's wife, Hermine Boettger.

Geographic range

''P. herminae'' is found in the

of Japan.

Habitat

The preferred natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

of ''P. herminae'' is

forest A forest is an ecosystem characterized by a dense ecological community, community of trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, ...

Description

''P. herminae'' may attain a total length of , which includes a tail about long. Boulenger (1896).

Behavior

''P. herminae'' is

terrestrial Terrestrial refers to things related to land or the planet Earth, as opposed to extraterrestrial. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on o ...

Diet

''P. herminae'' preys upon

earthworm An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta. In classical systems, they we ...

Reproduction

''P. herminae'' is

oviparous Oviparous animals are animals that reproduce by depositing fertilized zygotes outside the body (i.e., by laying or spawning) in metabolically independent incubation organs known as eggs, which nurture the embryo into moving offsprings kno ...

. An adult female may lay a

clutch A clutch is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor, while the clutch's output shaft is connected to the mechanism that does th ...

of about eight eggs in August, which is later than other species of terrestrial snakes lay eggs in the Ryukyus.

References

* Boettger O (1895). "''Neue Frösche und Schlangen von den Liukiu-Inseln'' ". ''Zoologischer Anzeiger'' 18: 266–270. (''Ablabes herminae'', new species, p. 269). (in German). * Boulenger GA (1896). ''Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ) ....'' London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 727 pp. + Plates IXXV. (''"Ablabes herminæ"'', p. 643). * Figueroa A, McKelvy AD, Grismer LL, Bell CD, Lailvaux SP (2016). "A Species-Level Phylogeny of Extant Snakes with Description of a new Colubrid Subfamily and Genus". ''PLoS ONE'' 11 (9): e0161070. (''Ptyas herminae'', new combination). *Goris, Richard C; Maeda, Norio (2004). ''Guide to the Amphibians and Reptiles of Japan''. Malabar, Florida: Krieger Publishing Company. 285 pp. . * Stejneger L (1907). ''Herpetology of Japan and Adjacent Territory''. United States National Museum Bulletin 58. Washington, District of Columbia: Smithsonian Institution. xx + 577 pp. (''Liopeltis herminæ'', new combination, pp. 343–344, Figures 296–297). Ptyas Endemic reptiles of Japan Endemic fauna of the Ryukyu Islands Taxa named by Oskar Boettger Reptiles described in 1895 Taxonomy articles created by Polbot {{Colubrinae-stub