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Varzea bistriata (SPIX, 1825)

IUCN Red List - Varzea bistriata - Least Concern, LC

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Higher TaxaScincidae, Mabuyinae (Mabuyini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Two-striped Mabuya
Portuguese: Calango-Liso, Lagarto-Liso 
SynonymScincus bistriatus SPIX 1825: 23
Eumeces Spixii DUMÉRIL & BIBRON 1839: 642
? Mabouya agilis — GOSSE 1849: 307
Mabuya agilis — BURT & BURT 1931: 299
Mabuya mabouya mabouya — DUNN 1936: 544 (part)
Mabuya mabouya — HOOGMOED 1979: 278
Mabuya ficta REBOUCAS-SPIEKER 1981: 161
Mabuya bistriata — HOOGMOED & GRUBER 1983: 396
Mabuya bistriata — GREER et al. 2000
Mabuya bistriata — MAUSFELD et al. 2002
Varzea bistriata — HEDGES & CONN 2012: 215 
DistributionBrazil (Amazonas, E Para, Amapa, Rio de Janeiro), French Guiana, Bolivia (Beni, La Paz, Pando, Santa Cruz), Colombia ?, Trinidad ?, Jamaica (Wilson & Vogel 2000)

Type locality: "Belem, Para', Brazil'  
TypesLectotype: RMNH 2512, Paralectotype: ZSM 112/0 (lost), (designated by Hoogmoed and Gruber 1983) 
DiagnosisDiagnosis (genus). Species in this genus are characterized by (1) frontoparietals, two, (2) supraciliaries, 4–5, (3) supraoculars, four, (4) prefrontal contact, absent or (less commonly) present, (5) parietal contact, present, (6) rows of nuchals, one, (7) dorsals + ventrals, 116–126, (8) total lamellae, 208, (9) a dark middorsal stripe, absent, (10) dark dorsolateral stripes, absent (except, occasionally, as rows of broken spots), (11) dark lateral stripes, present, and (12) dark ventral striping, absent. They reach 97 mm SVL (Table 2).

Species of Varzea are not especially distinctive among mabuyines, having the normal dark lateral stripes and most of the basic head scale conditions shared with other genera. Varzea differs from Aspronema, Brasiliscincus, Capitellum, Manciola, and Psychosaura in having more total digital lamellae (208 versus 147–201). The presence of a single nuchal row separates this genus from Exila and Panopa (2–5 nuchal rows) and from most Spondylurus (usually 2–3 rows, rarely one). The presence of two frontoparietals (unfused) separates this genus from Exila, Notomabuya, and Panopa (one frontoparietal). The absence of a middorsal dark stripe further distinguishes this genus from Aspronema and Manciola. Contact of the parietal scales distinguishes this genus from the Genus Copeoglossum (parietals rarely in contact). In having four supraoculars, Varzea is separated from two genera with three supraoculars: Aspronema (rarely four) and Mabuya (rarely two or four). From Manciola (136–141 dorsals + ventrals) and Maracaiba (127 dorsals + ventrals), it differs by having fewer dorsals + ventrals (116–126). The presence of dark dorsolateral stripes, albeit narrow, short, and sometimes absent in V. altamazonica, separates Varzea from Alinea, Capitellum, Copeoglossum, Exila, Mabuya (rarely present), Maracaiba, Marisora (rarely present), and Notomabuya. Varzea differs from Psychosaura in having a typical mabuyine head shape (subacuminate) versus a prominent, acuminate head shape in Psychosaura [HEDGES & CONN 2012]. 
CommentAvila-Pires (1995) addressed the status of Amazonian Mabuya in what is now considered the M. mabouya species complex, but the assignment of Antillean populations remains unresolved. The name M. bistriata has also been used for a taxon that is called M. nigropunctata by Avila-Pires (1995).

Distribution: Because this species has been confused with others, some of the distribution records maybe in error. For example, the “redefined” M. bistriata does not appear to occur in Peru (where it is replaced by M. nigropunctata).

Type Species: Mabuya bistriata Spix, 1825:23 is the type species of the genus Varzea HEDGES & CONN 2012. 
EtymologyThe generic name (Varzea) is a feminine noun, from the Portugese várzea (a pre-Roman word, Iberian in origin) meaning "flooded river bank," in allusion to the apparent preferred habitat of these species. 
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