Amphisbaena arenicola PEREZ & BORGES-MARTINS, 2019
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|Higher Taxa||Amphisbaenidae, Amphisbaenia, Lacertoidea, Squamata (lizards)|
|Synonym||Amphisbaena arenicola PEREZ & BORGES-MARTINS 2019|
|Distribution||Brazil (Santa Catarina)|
Type locality: Praia dos Ingleses, municipality of Florianopolis, State of Santa Catarina, Brazil (27° 26’S, 48° 23’O).
|Types||Holotype: UFRGS 5892. Collected by Tobias S. Kunz (Fig. 8). Paratypes: UFRGS5893, 5894, 5967*Ingleses, Florianopolis,|
Santa Catarina, Brazil; Referred material: CHUFSC 668, 683 Rio Vermelho, Florianopolis, Santa Catarina, Brazil; CHUFSC 696; UFRGS 5968*, 6303*, 6615*, 6616*, 6702* Ingleses, Florianopolis, Santa Catarina, Brazil; CHUFSC 856 Baixada do Macaimbu, Pinheira, Santa Catarina, Brazil. Specimens indicated with an asterisk where included on genetic analysis.
|Diagnosis||Diagnosis: Amphisbaena arenicola sp. nov. is distinguished from other Amphisbaena by the following character combination: (1) rounded head; (2) smooth segments at the tip of the tail; (3) four pre-cloacal pores; (4) 199-216 body annuli; (5) caudal autotomy seen externally from 8-9 caudal anulli; (6) 3/3 or 4/4 supralabial shields; (7) short snout, representing less than 50% of head length.|
Comparison: Amphisbaena arenicola sp. nov. is distinguished from A. albocingulata by presenting the post-malar row (vs. post-malar row absent). Differs from A. hogei by presenting 199-216 body annuli (vs. 177-191 body annuli). It differs from A. heterozonata by presenting 20-22 caudal annuli (vs. 13-17 caudal annuli). It differs from A. nigricauda by having a uniformly colored tail tip (vs. a darkly colored tail tip). Differs from A. trachura by presenting smooth scales on tail tip (vs. tuberculate scales). It differs from A. darwinii by presenting a slender body and smaller adult SVL ranging between 117 and 178 mm (vs. sturdy body with long SVL in adults, 150-304 mm). Differs from A. prunicolor by presenting a uniform coloration pattern (vs. checkered coloration pattern). Differs from A. tiaraju sp. nov. by presenting a larger number of ventral segments in the midbody annulus, varying between 16 and 18 (vs. 13-16) and a smaller snout, varying between 42.6 and 47.9% (x = 45.9 ± 1.9) of head length (HL) (vs. 48.5-55.8%. x = 52.4 ± 3.1 of HL). It differs from A. munoai by presenting 3/3 or 4/4 supralabial shields (vs. always 3/3 supralabial shields) and smaller nasal suture varying between 12.5 and 17.2% (x = 14.7 ± 1.5) of HL (vs. 14.1-20.8, x = 17.6 ± 1.5 of HL). It differs from A. nana sp. nov. by presenting a widened ocular shield, with larger size than ocular shield, varying between 22,0 and 24,4% (x = 23.1 ± 0.9) of head length (HL) (vs. 17.7-22.8; x = 21.3 ± 1.3; with similar size of the ocular shield) and by 3.4% of 16S rDNA mean genetic distance.
|Etymology||The specific epithet arenicola is an adjective derived from the Latin word for living in the sand. This name was chosen because this is the only taxon of the species-group inhabiting mainly sandy habitats (Restinga areas).|
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