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Marisora magnacornae HEDGES & CONN, 2012

IUCN Red List - Marisora magnacornae - Data Deficient, DD

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Higher TaxaScincidae, Mabuyinae, Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Corn Island Skink 
SynonymMarisora magnacornae HEDGES & CONN 2012
Mabuya agilis — BARBOUR & LOVERIDGE 1929: 142 (part)
Mabuya mabouya mabouya — DUNN 1936: 544 (part)
Mabuya brachypodus — TAYLOR 1956: 308 (part)
Mabuya brachypoda — WEBB 1958: 1311 (part)
Mabuya mabouya mabouya — PETERS & DONOSO-BARROS, 1970: 200 (part)
Mabuya unimarginata — VILLA et al., 1988: 54 (part)
Mabuya brachypoda — CAMPBELL 1998: 167 (part)
Mabuya unimarginata — LEE 1996: 247 (part)
Mabuya unimarginata — SAVAGE 2002: 503 (part)
Marisora magnacornae — MCCRANIE et al. 2020: 333 
DistributionNicaragua (Great Corn Island), elevation 0-110 m.

Type locality: Great Corn Island, Nicaragua  
TypesHolotype: MCZ R-26976, an adult male collected between 10 December 1927 and 3 January 1928 on Great Corn Island, Nicaragua by James L. Peters (Peters 1929). Only known from the holotype. 
DiagnosisDiagnosis. Marisora magnacornae sp. nov. is characterized by (1) maximum SVL in males, 77.4 mm; (2) maximum SVL in females, not available; (3) snout width, 2.71% SVL; (4) head length, 18.6% SVL; (5) head width, 14.0% SVL; (6) ear length, 1.36% SVL; (7) toe-IV length, 12.4% SVL; (8) prefrontals, two; (9) supraoculars, four; (10) supraciliaries, four; (11) frontoparietals, two; (12) supralabial below the eye, five; (13) nuchal rows, one; (14) dorsals, 57; (15) ventrals, 60; (16) dorsals + ventrals, 117; (17) midbody scale rows, 30; (18) finger-IV lamellae, 12; (19) toe-IV lamellae, 17; (20) finger-IV + toe-IV lamellae, 29; (21) supranasal contact, Y; (22) prefrontal contact, N; (23) supraocular-1/frontal contact, N; (24) parietal contact, Y; (25) pale middorsal stripe, N; (26) dark dorsolateral stripe, N; (27) dark lateral stripe, Y; (28) pale lateral stripe, Y; and (29) palms and soles, pale (Tables 3–5).
Marisora magnacornae sp. nov. differs from all other species in the Genus Marisora in having a longer toe-IV (12.4% SVL versus 7.96–11.9% in other species except M. brachypoda; 7.43–12.2% SVL in 89% of that species). It also differs from individual species in other characters. The limbs of M. magnacornae sp. nov. are longer than most species (arm + leg length 62.3% SVL), and in this character it differs from M. aurulae sp. nov. (53.7–55.9% SVL), M. brachypoda (45.3–61.7% SVL), M. falconensis (53.5–61.6% SVL), and M. roatanae sp. nov. (54.5– 56.2% SVL; Fig. 49). Marisora magnacornae sp. nov. also differs in having fewer dorsals + ventrals (117) than M. roatanae sp. nov. (122–125). From M. alliacea it differs in having 30 midbody scale rows (versus 26–29) and in lacking dark dorsolateral stripes (present in M. alliacea). From M. roatanae sp. nov. it additionally differs in having 30 midbody scale rows (versus 32), a relatively longer supraciliary-1 scale (1.61% SVL versus 1.04–1.29%; Fig. 50A), and absence of pale ventrolateral stripes. From M. unimarginata it differs in having two pairs (versus one pair) of chin shields in contact with the infralabials, a narrower pale lateral stripe (1.10% SVL versus 1.43– 1.89%) and in having the pale lateral stripe passing through the lower half of the ear opening (that stripe passes through all or most of the ear opening in M. unimarginata) [HEDGES & CONN 2012].

See McCranie et al. 2020: 333 for an expanded diagnosis. 
CommentAbundance: only known from the type specimen (Meiri et al. 2017).

Distribution: see map in McCranie et al. 2020: 317 (Fig. 6). 
EtymologyThe species name (magnacornae) is a feminine genitive singular noun, referring to the island on which the species occurs. Although formally called Great Corn Island, it is usually called simply "Corn Island," and hence the English common name, Corn Island Skink. The language of Nicaragua is Spanish, but the Corn Islands were named by the British, and the government of Nicaragua maintains the English name as the official name for the islands. Hence we use that English name as a stem for the species name [HEDGES & CONN 2012]. 
  • Hedges SB, Powell R, Henderson RW, Hanson S, and Murphy JC 2019. Definition of the Caribbean Islands biogeographic region, with checklist and recommendations for standardized common names of amphibians and reptiles. Caribbean Herpetology 67: 1–53
  • Hedges, S.B. & Conn, C.E. 2012. A new skink fauna from Caribbean islands (Squamata, Mabuyidae, Mabuyinae). Zootaxa 3288: 1–244 - get paper here
  • MCCRANIE, JAMES R.; AMY J. MATTHEWS, S. BLAIR HEDGES 2020. A morphological and molecular revision of lizards of the genus Marisora Hedges & Conn (Squamata: Mabuyidae) from Central America and Mexico, with descriptions of four new species. Zootaxa 4763 (3): 301–353 - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Sunyer, J., K.E. Nicholson, J.G. Phillips, J.A.Gubler, and L.A. Obando 2013. Lizards (Reptilia: Squamata) of the Corn Islands, Caribbean Nicaragua. Check List 9: 1383–1390 - get paper here
  • Sunyer, Javier 2014. An updated checklist of the amphibians and reptiles of Nicaragua. Mesoamerican Herpetology 1 (2): 186–202. - get paper here
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