Atractus alphonsehogei DA CUNHA & DO NASCIMENTO, 1983
Can you confirm these amateur observations of Atractus alphonsehogei?
|Higher Taxa||Colubridae (Dipsadinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Alphonse's Ground Snake|
|Synonym||Atractus alphonsehogei DA CUNHA & DO NASCIMENTO 1983|
Atractus alphonsehogei — PASSOS et al. 2007
Atractus alphonsehogei — WALLACH et al. 2014: 68
Atractus alphonsehogei — NOGUEIRA et al. 2019
|Distribution||Brazil (Amazonas, Maranhão, Pará)|
Type locality: Bela Vista, 75 km da PA-242, rodovia Braganca-Viseu.
|Types||Holotype: MPEG 14.928, adult male, collected by O. Cunha and F. Nascimento on August 01 1978 at Bela Vista, Km 75 of the PA-242 road near municipality Nova Timboetuba (ca., 01°12’47’’S, 47°23’18’’W; 30 m asl), state of Pará, Brazil (Fig. 8 in Passos et al. 2018). Paratypes (18): MPEG, see list in Passos et al. 2018.|
|Diagnosis||Diagnosis. Atractus alphonsehogei is distinguished from all congeners, except for those species of the A. collaris species group by having one (usually) or two (rarely) apical pits on dorsal scales of both sexes and supracloacal tubercles in the cloacal region of mature males (Passos et al. 2013b). Additionally, the following unique combination of morphological characters is unique from the species and also distinguishes it from any species of Atractus: (1) dorsal scale rows 17/17/17 with apical pits and supracloacal tubercles in males; (2) postoculars two; (3) moderately long loreal, contacting first three supralabials; (4) temporals 1+2; (5) seven supralabials, third and fourth contacting eye; (6) seven infralabials, first three contacting chinshields; (7) six maxillary teeth; (8) gular scale rows in four series; (9) preventrals usually four; (10) ventrals 163–176 in females, 150–162 in males; (11) subcaudals 17–21 in females, 23–26 in males; (12) in preservative, dorsum brown to grayish black, with cream occipital collar incomplete, first dorsal scale rows with lighter center limited dorsally by dark brown lateral lines on the second and third scale rows, and two barely conspicuous brown dorsolateral lines on the sixth to seventh scale rows on each side of body; (13) in preservative, venter cream except for two lines (one from each side of belly) on the lateral margins of ventral scales (paraventral region); (14) small body size, females reaching 284 mm SVL, males 218 mm; (15) moderate tail length in females (8.0–11.4% SVL) and males (12.3– 13.1% SVL); (16) hemipenis moderately bilobed, non-capitate, and non-calyculate (Passos et al. 2018).|
Comparisons. Atractus alphonsehogei differs from all members of the A. collaris species group, except A. collaris and A. gaigeae, by having first supralabial contacting loreal (vs. first supralabial not contacting loreal in A. caxiuana, A. hoogmoedi, A. surucucu, and A. zidoki). Atractus alphonsehogei differs from A. collaris in having calcified alary spines and hemipenial lobes centrifugally oriented, dorsum uniformly dark brown or black lacking spots, and cream supralabials (vs. alary spines lacking calcification and lobes centrolinearly oriented, dorsum with conspicuous spots, and yellow supralabials); from A. gaigeae in having 163–176 ventrals in females, 150–162 in males, six maxillary teeth, and lacking the vertebral line (vs. 200–214 ventrals in females, 184–198 in males; usually five maxillary teeth, and conspicuous vertebral line) (Passos et al. 2018).
|Comment||Only known from the type locality.|
|Etymology||Named after Dr. Alphonse Richard Hoge (1912-1982), a Brazilian-born Belgian herpetologist. Soon after his birth, the family returned to Belgium (1913). However, he returned to Brazil and joined Instituto Butantan, São Paulo, Brazil (1946), and was Director of the Biology Departtnent (1969-1982).|