Tricheilostoma bicolor (JAN, 1860)
Can you confirm these amateur observations of Tricheilostoma bicolor?
|Higher Taxa||Leptotyphlopidae, Epictinae, Epictini, Typhlopoidea, Serpentes, Squamata (snakes)|
|Common Names||Two-colored Blind Snake|
|Synonym||Stenostoma (Tricheilostoma) bicolor JAN 1860|
Stenostoma (Tricheilostoma) gracile JAN 1860
Stenostoma brevicauda BOCAGE 1887: 194
Glauconia brevicauda - BOULENGER 1890: 92
Glauconia bicolor - BOULENGER 1890: 92
Glauconia brevicauda — BOULENGER 1893: 67
Glauconia bicolor — BOULENGER 1893: 68
Glauconia bicolor gruveli CHABANAUD 1917
Glauconia gruveli - BOULENGER 1920
Leptotyphlops bicolor - LEESON 1950
Leptotyphlops brevicauda - LEESON 1950: 20
Leptotyphlops brevicauda — HUGHES & BARRY 1969
Leptotyphlops cairi — HAHN 1980: 7
Leptotyphlops brevicaudus — HAHN 1980: 9
Leptotyphlops bicolor — HAHN & WALLACH 1998
Leptotyphlops bicolor — MCDIARMID, CAMPBELL & TOURÉ 1999: 21
Guinea bicolor — ADALSTEINSSON, BRANCH, TRAPE, VITT & HEDGES 2009
Leptotyphlops brevicaudus — ULLENBRUCH et al. 2010
Tricheilostoma bicolor — HEDGES 2011
Leptotyphlops bicolor — SEGNIAGBETO et al. 2012: 348
Tricheilostoma bicolor — WALLACH et al. 2014: 737
|Distribution||Togo, Benin, SW Chad, Ghana, Nigeria, Burkina Faso, Niger, Ivory Coast, Mali, Guinea, possibly Cameroon (Hughes 1983)|
brevicaudus: Benin, Ghana, Ivory Coast, Mali, Niger, Nigeria; Type locality: Dahomey. Type locality: Dahomey
Type locality: Boutry, Gold Cost (= Butre, Ghana) Map legend:
- Region according to the TDWG standard, not a precise distribution map.
NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
|Types||Holotype: RMNH 3682|
Holotype: MBL. destroyed according to HAHN 1980 [brevicaudus]
holotype: MNHN 1916.196 [Glauconia bicolor gruveli]
|Comment||Synonymie: brevicauda and bicolor have been synonymized by HAHN & WALLACH 1998.|
Distribution: Leptotyphlops brevicauda has been erroneously listed for Benin but does not occur there (Hughes 2013).
Type species: Stenostoma (Tricheilostoma) bicolor JAN 1860 is the type species of the genus Tricheilostoma HEDGES, ADALSTEINSSON, BRANCH 2009 (designated by HEDGES 2011). Note that the same speces had been designated as type species of Guinea previously. However, Guinea is a homonym of the hymenopteran genus Guinea Koçak & Kemal, 2008. Also, Loveridge (1957) mistakenly designated Stenosoma macrolepis as type species of Tricheilostoma, referring to the journal article (Jan 1861b). Pinto et al. (2010) acknowledged the mistake but considered his type designation to be valid based on Art. 70.2 of the ICZN which states that an earlier, overlooked, type fixation should be accepted and any later fixations treated as invalid. However, that article is irrelevant here because no type was ever correctly fixed. What was called Tricheilostoma by HEDGES et al. 2009 is now called Trilepida sp.
Diagnosis (genus): Species of Tricheilostoma have 14 midbody scale rows, 12 midtail scale rows, 173–288 middorsal scale rows, 6–16 subcaudals, three (two in G. greenwelli) supralabials, small anterior supralabials (large in G. sundewalli), 112–188 mm maximum adult total length, a body shape of 24–69.2 (total length/width), a relative tail length of 2.4–7.0 %, a tail shape of 1.4–4.3, no striped pattern, a brown dorsum (unpigmented in G. greenwelli), and paler brown venter (Table 2). They are distinguished from the other genus in this tribe, Rhinoleptus, by having 14 midbody scale rows (versus 16), 12 midtail rows (versus 14), 173–288 middorsal rows (versus 302–546), 6–16 subcaudals (versus 21–28), and a body shape of 24–69.2 (versus 67–77). Only one species was included in the molecular phylogenetic analyses (Figs. 3–4). [adapted from ADALSTEINSSON et al. 2009].
|Etymology||Etymology (genus): The generic name refers to the presence of three supralabials.|
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