Exila nigropalmata (ANDERSSON, 1918)
Can you confirm these amateur observations of Exila nigropalmata?
|Higher Taxa||Scincidae, Mabuyinae, Scincoidea, Sauria, Squamata (lizards)|
|Common Names||Black Mabuya|
|Synonym||Mabuia nigropalmata ANDERSSON 1918: 8|
Mabuya nigropalmata — BURT & BURT 1933: 86 (part)
Mabuya nigropalmata — PETERS et al. 1970: 200
Mabuya nigropalmata — GREER & NUSSBAUM 2000
Mabuya nigropalmata — MAUSFELD et al. 2002
Exila nigropalmata — HEDGES & CONN 2012: 85
Exila nigropalmata — RIBEIRO-JÚNIOR & AMARAL 2016
|Distribution||Brazil (Rio Curuca), Bolivia (La Paz: San Fermin), Peru [Gordo et al. 2006]|
Type locality: Rio Curucá, Brazil and San Fermin, Bolivia.
|Types||Syntypes: NRM 23258-59|
|Diagnosis||Diagnosis (genus). Species in this genus are characterized by (1) frontoparietals, one, (2) supraciliaries, five, (3) supraoculars, four, as reported in original description (Andersson 1918), but supraoculars were not reported by Miralles et al. (2009), (4) prefrontal contact, present, (5) parietal contact, present, (6) rows of nuchals, 2–3, (7) dorsals + ventrals, undetermined (46–58 dorsals and 30–47 ventrals as reported by Miralles et al., 2009a, but those counts were made using a different counting method than used here), (8) total lamellae, not reported, (9) a dark middorsal stripe, absent, (10) dark dorsolateral stripes, absent, (11) a dark lateral stripe, present, and (12) dark ventral striping, absent. Body size was not reported by Miralles et al. (2009), but Andersson (1918) noted in the original description that the largest specimen was 60 mm SVL (Table 2).|
Having a single (fused) frontoparietal separates Exila from all others except Notomabuya and Panopa (single frontoparietal) and Aspronema (1–2 frontoparietals). Contact between the prefrontals separates Exila from Brasiliscincus, Capitellum, Notomabuya, and Psychosaura (no contact) and from Alinea, Aspronema, Copeoglossum, Mabuya, Manciola, Maracaiba, and Marisora (contact only rarely). From Aspronema, Brasiliscincus, Manciola, Orosaura, Panopa, Psychosaura, and Spondylurus, it is distinguished by the absence of dark dorsolateral stripes. It differs from Brasiliscincus, Capitellum, Copeoglossum, Manciola, Maracaiba, Notomabuya, Orosaura, and Varzea by having more than one pair of nuchals.
|Comment||Distribution: Mabuya nigropalmata described from Venezuela by several authors correspond to M. crozaiti. Mabuya nigropalmata has also been reported from from Para (Brazil), Peru and from the Guianas, although there seem to be no records from these localities.|
Type Species: Mabuya nigropalmata Andersson, 1918:8 is the type species of the genus Exila HEDGES & CONN 2012.
Phylogenetics: The phylogenetic position of Exila has not yet been firmly established among the various generic clades (e.g., Copeoglossum, Spondylurus).
|Etymology||The generic name (Exila) is a feminine noun derived from the Latin adjective exilis (lean), alluding to the thin body shape and unusually low number of midbody scale rows in this species (24–28).|