Pareas nuchalis (BOULENGER, 1900)
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Pareas nuchalis
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| Higher Taxa | Pareidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Barred slug-eating snake |
| Synonym | Amblycephalus nuchalis BOULENGER 1900: 185 Amblycephalus nuchalis — DE ROOIJ 1917: 277 Pareas nuchalis – MALKMUS 1996 Pareas nuchalis — MALKMUS et al. 2002 Pareas nuchalis — WALLACH et al. 2014: 537 Pareas (Pareas) nuchalis — POYARKOV et al. 2022: 62 |
| Distribution | Indonesia (Borneo), Malaysia (Borneo, Sarawak) Type locality: Matang, Kidi District, Sarawak. |
| Reproduction | oviparous |
| Types | Holotype: SMK, a 490 mm specimen (A. Everett?), Sarawak Museum, Kuching, Sarawak, East Malaysia |
| Diagnosis | Diagnosis (n= 9): Pareas nuchalis differs from other members of the genus Pareas by the following combination of morphological characters: maximal total length up to 678 mm; anterior pair of chin shields longer than broad; loreal not contacting the eye; prefrontal in contact with the eye; 1–3 suboculars; 1–2 postoculars; temporals generally 3 + 4 or 3 + 3; one to three median vertebral scale rows slightly enlarged; 7–8 supralabial scales; generally 7 (rarely 6 or 8) infralabials; 15 dorsal scale rows at midbody, all totally smooth; 201–220 ventrals; 102–120 subcaudals, all divided; dorsum tan to light brown with weak dark-brown vertebral spots and 61–78 distinct transverse dark-brown bands (Figs. 16 and 17); upper postorbital stripes thick, black, bifurcating posterior to the secondary temporals, forming a vertical black bar to the mouth angle; upper postorbital stripes contacting each other on the nuchal area forming a large black ring-shaped blotch (Fig. 17); lower postorbital stripes thick, black, reaching the anterior part of SL6, often continuing to the lower jaw and chin; belly yellowish immaculate or with sparce brown dusting (Figs. 16 and 17); iris in life whitish with brownish speckles and veins getting denser around the pupil (Fig. 17) (Boulenger, 1900; Stuebing, Inger & Lardner, 2014; our data). |
| Comment | Habitat: partly arboreal (Harrington et al. 2018). |
| Etymology | Named after the Latin adjective in nominative singular meaning “nuchal” and was given in reference to the characteristic black ring-shaped spot in the nuchal area in this species. |
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