Tropidophis paucisquamis (MÜLLER, 1901)
Can you confirm these amateur observations of Tropidophis paucisquamis?
|Higher Taxa||Tropidophiidae, Henophidia, Alethinophidia, Serpentes, Squamata (snakes)|
|Common Names||E: Brazilian Dwarf Boa|
|Synonym||Ungalia paucisquamis MÜLLER in SCHENKEL 1901|
Ungalia brasiliensis ANDERSSON 1901
Tropidophis paucisquamis — STULL 1928: 19
Tropidophis paucisquamis — AMARAL 1930
Tropidophis paucisquamis — MCDIARMID, CAMPBELL & TOURÉ 1999: 221
Tropidophis paucisquamis — CURCIO et al. 2012: 92
Tropidophis paucisquamis — WALLACH et al. 2014: 755
Tropidophis paucisquamis — NOGUEIRA et al. 2019
|Distribution||SE Brazil (Espírito Santo, Rio de Janeiro, São Paulo, Paraná) elevation 500-650 m|
Type locality: "Continent of Tropical America" [MÜLLER in SCHENKEL 1901]; restricted to municipality of Salesópolis, state of São Paulo, Brazil by CURCIO et al. 2012.
brasiliensis: Type locality: "Brasilia" [ANDERSSON 1901]
|Types||Holotype: NMBA 426 (Naturhistorisches Museum Basel.|
Holotype: NRS 1932 [ANDERSSON 1901]
|Diagnosis||Diagnosis. Distinguishable from other mainland congeners by the following combination of characters: (1) 164–183 ventrals (vs. 154–155 in T. grapiuna, 146–160 in T. taczanowskyi, and 200 in T. battersbyi); (2) dorsal scales at midbody usually 21 or 23, rarely 25 (vs. 23 dorsals at midbody in all other mainland species); (3) vertebral scale row usually enlarged, wider than long (vs. verte- bral scale row not distinctly enlarged in size relative to remaining dorsals in T. battersbyi, T. grapiuna, and T. taczanowskyi); (4) dorsals smooth or feebly keeled (vs. dorsals strongly keeled in T. grapiuna and T. taczanowskyi); (5) interparietals usually lacking, but small when present (vs. interparietals present in T. battersbyi and T. grapiuna, usually present in T. taczanowskyi, well developed in the three species); (6) parietals in broad contact along middorsal line of head, even when interpari- etals are present (vs. parietals fully separated by interparietals in T. battersbyi and T. grapiuna); (7) maxillary teeth 15–19 (vs. 12 in T. battersbyi); (8) body spotted, dorsal spots small, with a diameter of approximately two dorsals, and irregular in shape (vs. dorsal spots large, rounded or elliptical, up to four scales in diameter in T. battersbyi); and (9) eight spot rows around body six on dorsum and two on venter (vs. six spot rows around body, four on dorsum and two on venter in T. battersbyi) [CURCIO et al. 2012].|
|Comment||Synonymy that of PETERS & OREJAS-MIRANDA 1970.|
Comparisons. Ventral counts of T. paucisquamis are apparently intermediate among South American taxa. However, with the evidence at hand, it is the only mainland species to have a good proportion of specimens with 21 dorsal scales at midbody (approximately 41% of our sample). Nonetheless, this observation is not decisive because other mainland taxa are known by considerably smaller samples. Subcaudal counts of T. paucisquamis may be high (up to 38), overcoming T. taczanowskyi and T. grapiuna, but not T. battersbyi (41 subcaudals in the only known specimen). The enlarged scales of the vertebral row of dorsals, present in most specimens of T. paucisquamis, do not occur in T. battersbyi, T. grapiuna, and T. taczanowskyi [CURCIO et al. 2012].
Habitat: partly arboreal (Harrington et al. 2018).
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