Polychrus liogaster BOULENGER, 1908
Can you confirm these amateur observations of Polychrus liogaster?
|Higher Taxa||Polychrotidae, Iguania, Sauria, Squamata (lizards)|
|Common Names||E: Boulenger's Bush Anole|
G: Glattbäuchiger Buntleguan
Portuguese: Camaleão, Camaleãozinho, Papa-Vento
|Synonym||Polychrus liogaster BOULENGER 1908: 113|
Polychrus marmoratus liogaster — BURT & BURT 1933: 41
Polychrus liogaster — PETERS et al. 1970: 234
Polychrus marmoratus — DUELLMAN 1987: 492
Polychrus liogaster — DIRKSEN & DE LA RIVA 1999
Polychrus liogaster — SCHLÜTER 2013: 57
|Distribution||Bolivia (Amazonas, Beni, Cochabamba, Santa Cruz), SE Peru, Brazil (Acre, Amazonas, Rondonia), Ecuador|
Type locality: Provincia Sara, Bolivia, 750 m elevation, and Chanchamayo, eastern Peru.
|Types||Type: BMNH 1918.104.22.168-23 (and possibly additional specimens).|
|Diagnosis||Diagnosis. Polychrus with a blunt snout; relatively large and nearly smooth scales on dorsal surface of head; nasal in contact with second supralabial, in some specimens also with a short suture with first or third supralabial; a gular crest formed b y low and wide, enlarged scales present anterior to gular fan; scales o n sides of neck larger than those on nape, and those on flanks about as large as, or smaller than, scales on tail; ventrals smooth or only slightly keeled; with three black lines radiating from each eye, two of which reach level of forelimbs. No sexual dimorphism in colour pattern. A forest inhabitant (Avila-Pires 1995: 133).|
Description. Very similar to P. marmoratus, to the description of which I refer, except for what follows. Maximum SVL in males 134 mm (BM 1922.214.171.124), in females 152 mm (RMNH 5243a). Head 0.21-0.25 (0.22 ± 0.02, n= 12) times SVL, 1.5-1.6 (1.57 ± 0.05, n= 12) times as long as wide, 1.0-1.2 (1.14 ± 0.06, n= 12) times as wide as high. Forelimbs 0.35-0.39 (0.37 ± 0.02, n= 7) times SVL, hind limbs 0.49-0.51 (0.50 ± 0.01, n= 5) times, tibia 0.14-0.17 (0.15 ± 0.01, n= 12) times, tail 2.4-3.1 (2.67 ± 0.23, n= 10) times.
Postrostrals 2-4. Scales on snout between second canthals 2-4, mostly three. Canthals two. Scales in supraorbital semicircle 7-8, exceptionally nine. Supraciliaries 9-13, mostly 11-12. Loreal scales below second canthal 1-3. Preoculars 2-3, suboculars 2-3, postoculars 3-4. Supralabials 6-7, one but last below centre of eye, followed to commissure by 2-4 scales. Postmentals 2-4, mostly three. Infralabials 5-7,4-6 to below centre of eye, followed to commissure by 2-4 (mostly three) scales. Enlarged scales in gular crest low, wide. Scales on sides of neck slightly larger than those on nape. Dorsals smooth or slightly keeled, 103-125 (110.3 ± 6.9, n= 12) scales in a middorsal line between occiput and posterior margin of hind limbs. Scales on flanks mostly smooth. Ventrals mostly smooth or, in some specimens, part of them (especially posteriorly) slightly keeled. Scales around midbody 66-95 (79.4 ± 7.6, n= 12). Femoral pores either form a notch in a scale, or occupy its centre; total number 15-24 (21.3 ± 2.8, n= 12). Lamellae under fourth finger 29-37 (32.6 ± 2.4, n= 24,12 specimens), under fourth toe 38-47 (42.1 ± 2.7, n= 24,12 specimens).
BM 19126.96.36.199 is mainly blue, with a wide tan vertebral band and tan tail; it has a label on which it is described as "nice live green, the light brown colour of tail runs over the back until the neck" (translated from German). CEPB 302-303 have a similar pattern, while the remaining specimens are an irregular mixture of blue and brown, with or without "V"-shaped transverse light bands along back and flanks. The three black lines radiating from eyes, which are present in P. marmoratus, are also seen, but here the two that are directed posteriorly continue along neck, where they may become wider, reaching level of forelimbs (in INPA 452 the head and neck segments are separated by a gap); they may enclose an area lighter than the area outside. The juvenile RMNH 5243 dorsally is brown with a banded pattern, ventrally mostly tan, chin and gular fan medially cream; the lines radiating from eyes are present but not very conspicuous (Avila-Pires 1995: 133).
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