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Marisora lineola MCCRANIE, MATTHEWS & HEDGES, 2020

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Higher TaxaScincidae, Mabuyinae, Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Mayan Skink 
SynonymMarisora lineola MCCRANIE, MATTHEWS & HEDGES 2020: 312
Mabuia agilis — GÜNTHER 1885: 33 (in part)
Mabuia agilis — BOULENGER 1887: 190 (in part)
Mabuya agilis — RUTHVEN 1912: 323
Mabuya agilis — STUART 1934: 13
Mabuya agilis — STUART 1935: 47
Mabuya agilis — GAIGE 1936: 298
Mabuya agilis — BURT & MYERS 1942: 49 (in part)
Mabuya mabouya — DUNN 1936: 539 (in part)
Mabuya mabouya mabouya — DUNN 1936: 544 (in part)
Mabuya mabouya mabouya — GAIGE et al. 1937: 11 (in part)
Mabuya mabouya mabouya — SMITH 1938: 5
Mabuya mabouya mabouya — SCHMIDT 1941: 496
Mabuya mabouya mabouya — SMITH 1936: 298
Mabuya mabouya mabouya — BURT & MYERS 1942: 49, 344 (in part)
Mabuya mabouya mabouya — STUART 1948: 55
Mabuya mabouya mabouya — SMITH & TAYLOR 1950: 156 (in part)
Mabuya mabouya mabouya — MASLIN 1963: 15.
Mabuya mabouya alliacea — BURGER 1952: 186 (in part)
Mabuya mabouya alliacea — WERLER & SMITH 1952: 563
Mabuya mabouya alliacea — STUART 1954: 57
Mabuya mabouya alliacea — STUART 1958: 23
Mabuya brachypoda — WEBB 1958: 1311 (in part)
Mabuya brachypoda — NEILL & ALLEN 1959: 45
Mabuya brachypoda — SMITH 1960: 223
Mabuya brachypoda — McCoy & VAN HORN 1962: 182
Mabuya brachypoda — NEILL & ALLEN 1962: 85
Mabuya brachypoda — DUELLMAN 1965: 603
Mabuya brachypoda — NEILL 1965: 98
Mabuya brachypoda — MCCOY 1966: 307
Mabuya brachypoda — GREER 1970: 172
Mabuya brachypoda — VILLAFUERTE & FLORÉS-VILLELA 1992: 47
Mabuya brachypoda — CAMPBELL 1998: Fig. 104 (legend)
Mabuya unimarginata — LEE 1996: 247
Mabuya unimarginata — CALDERÓN-MANDUJANO & MORA-TEMBRE 2004: 295
Mabuya unimarginata — LUJA 2006: 469
Mabuya unimarginata complex — MIRALLES et al. 2009: 68 (in part)
Mabuya unimarginata complex — PINTO-SÁNCHEZ et al. 2015: 204 (by implication)
Marisora brachypoda — HEDGES & CONN 2012: 24 (in part)
Marisora brachypoda — LARA-RESENDIZ et al. 2017: 226 (in part; map) 
DistributionGuatemala (Escuintla), Mexico (Caribbean versant from central Veracruz, Tabasco, and the Yucatán Peninsula), Belize

Type locality: El Salto, near Laguna Encantada, Escuintla, Guatemala, 14°16’53”N, -90°42’38”W, elevation 275 m  
Reproduction 
TypesHolotype. MVZ 88405, adult female, collected 2 March 1969, by “Woods & Crenshaw.”
Paratypes (15): GuATEMALA—MVZ 88406, adult male from the same locality as the holotype; Jutiapa: FMNH 68712, adult male, 7 miles W of Jutiapa; Petén: USNM 71382, adult female, Chuntuquí; USNM 25116, adult male, Sacluc; USNM 71951, adult female, “Petén.” MExICO—Campeche: KU 70560, adult male, 4 km S of Champotón; Chiapas: USNM 113656, adult male, USNM 113658–59, 113663, adult females, La Esperanza; USNM 113646, adult female, Palenque 17°32.30’N, 91°59.30’W; Tabasco: KU 41604, male, 19 miles N, 10 miles E of Macuspana; USNM 113640–41, adult female and adult male, respectively, Tenosique; Yucatán: KU 157475, 13.6 mi E of Mérida.
Additional specimens (62): USNM, LSUMZ, UTA, CM, KU 
DiagnosisDiagnosis. Marisora lineola sp. nov. is a relatively stout, large species of Marisora characterized (data from 8 males, 8 females in type series) by (1) maximum known SVL in males 80.9 mm; (2) maximum known SVL in females 86.2 mm [92.5 mm in specimen not examined by us; see Neill, 1965]; (3) SW 2.6–4.5% SVL in males, 2.2–3.7% in females; (4) HL 17.9–23.8% SVL in males, 16.0–20.5% in females; (5) HW 11.9–13.6% SVL in males, 11.2–12.8% in females; (6) EAL 1.4–2.2% SVL in males, 1.1–2.4% in females; (7) Toe IV length 10.1–12.9% SVL in males, 8.9–11.6% in females; (8) prefrontals one per side; (9) supraoculars four per side; (10) supraciliaries four per side in 93.8%, five in 6.2%; (11) frontoparietals one per side; (12) fifth supralabial below orbit in 93.8%, rarely sixth (6.2%); (13) nuchal rows one per side; (14) dorsals 54–59 (56.0 ± 1.7) in males, 57–61 (58.1 ± 1.1) in females; (15) ventrals 61–69 (63.9 ± 2.6) in males, 60–65 (62.1 ± 1.8) in females; (16) dorsals + ventrals 115–126 (119.9 ± 3.7) in males, 117–124 (120.1 ± 2.2) in females; (17) midbody scale rows 30 in 68.8%, 28 in 31.2%; (18) Finger IV lamellae 11–15 (12.4 ± 1.3) per side in males, 11–14 (11.9 ± 1.0) in females; (19) Toe IV lamellae 13–16 per side in both males and females (14.7 ± 1.2, 14.3 ± 1.3, respectively); (20) Finger IV + Toe IV lamellae 26–31 (27.0 ± 2.1) on one side in males, 24–30 (26.1 ± 1.9) in females; (21) supranasals in medial contact in 88.7%, not in medial contact in 11.3%, thus frontonasal in contact with rostral in 13.3%; (22) prefrontals not in contact; (23) supraocular 1-frontal contact absent in 93.3%, point contact made in 6.7%; (24) parietals in contact posterior to interparietal; (25) pale middorsal stripe absent, but dark brown dashes suggestive of a dark brown vertebral line present in some; also dorsal region with several similar rows of dark brown dashes to spots in many, or dark brown dashes or incomplete stripes present in others, especially on posterior third of body; (26) dark brown to black dorsolateral stripe (paired in some), some scales inside stripe with paler brown centers; those dark brown stripes or dashes present above upper edge of pale brown to cream dorsolateral stripe; (27) dark brown lateral stripe present; (28) distinct cream lateral stripe present; (29) palms and soles pale brown or cream, but dark in one (uTA R-22113); (30) total lamellae for five fingers 38–51 (43.9 ± 4.1) in males, 41–49 (45.4 ± 3.2) in females; (31) total lamellae for five toes 51–60 (54.6 ± 3.5) in males, 48–57 (51.7 ± 3.2) in females. In addition, this species is relatively short-limbed with FLL + HLL/SVL 53.7–59.3% in males, 45.1–57.8% in females, and has two or three chinshields contacting infralabials (see Table 3 for some variable characters).
Marisora lineola sp. nov. is a member of the M. alliacea group of Middle American skinks. Marisora lineola is most closely related to M. alliacea (Fig. 3), but differs from that species in having shorter limbs (FLL + HLL/SVL 53.7–59.3% in males and 45.1–57.8% in females versus 62.5–74.6% in males and 58.0–67.6% in females in M. alliacea). Marisora lineola differs from M. roatanae in having cream to pale brown palms and soles (versus distinct dark brown to nearly black soles and palms in M. roatanae) and in having 2–3 chinshields contacting infralabials (versus one chinshield making that contact in 70.8% in M. roatanae). Marisora lineola is most easily distinguished from M. brachypoda by having one or two dark brown or black dorsolateral body lines or dark brown dashes or spots suggesting lines (versus those dark marks absent or indistinct in M. brachypoda). Marisora lineola also differs from M. brachypoda by having more ventrals (61–69, x = 63.9 ± 2.6 in males and 60–65, x = 62.1 ± 1.8 in females (versus 50–63, x = 57.9 ± 3.4 in males and 55–62, x = 58.7 ± 3.2 in females in M. brachypoda). Marisora lineola is distinguished from M. aquilonaria sp. nov. and M. syntoma sp. nov. (both described below) in being a larger species (maximum known SVL 80.9 mm in males and 92.5 mm in females versus 68.6 mm and 75.2 mm, respectively, in M. aquilonaria and 68.5 mm and 75.0 mm, respectively, in M. syntoma), having a distinct pale brown dorsolateral stripe (versus that stripe absent or occasionally indistinct in M. aquilonaria and M. syntoma), and in having one or two dark brown or black dorsolateral body lines or dark brown dashes or spots suggesting lines (versus those dark marks absent or indistinct in M. aquilonaria and M. syntoma). Marisora lineola is further distinguished from M. syntoma by having more ventrals in males (61–69, x = 63.9 ± 2.6 versus 56–60, x = 57.4 ± 2.3 ventrals in males of M. syntoma). Marisora lineola is distinguished from M. urtica sp. nov. by having pale brown dorsolateral stripes and 2 chinshields contacting infralabials (versus those pale dorsolateral stripes absent and 1 chinshield contacting infralabials in M. urtica). Marisora lineola differs from M. magnacornae in having shorter limbs (FLL + HLL/SVL 53.7–59.3% in males and 45.1–57.8% in females versus 60.8–68.7% in males and 55.8–68.0% in females in M. magnacornae). Marisora lineola differs from the extralimital to this morphological study M. pergravis by having fewer ventrals (60–69 in both sexes combined versus 70–73 in M. pergravis), fewer dorsals (54–61 versus 62–63 in M. pergravis), and having a dark lateral stripe (versus that stripe absent in M. pergravis). Marisora lineola has been previously confused with M. unimarginata of the M. unimarginata group (Fig. 3), but differs from that species by having the fifth supralabial below the orbit in 93.8% (versus sixth supralabial below orbit in 81.9% in M. unimarginata), in having 2–3 chinshields in contact with infralabials (versus 1 chinshield contacting an infralabial in 82.9% in M. unimarginata), and having shorter limbs (FLL + HLL/SVL 53.7–59.3% in males and 45.1–57.8% in females versus 56.9–66.9% and 55.9–69.1%, respectively, in M. unimarginata). Marisora lineola is known to differ from the extralimital and poorly known M. berengerae (incomplete morphological data available only from the literature of the unsexed holotype) of the M. unimarginata group only from genetic data. 
CommentSynonymy: after MCCRANIE et al. 2020, see there for references.

Sympatry: “nearly sympatric with M. brachypoda in south-central Guatemala” (McCranie et al. 2020)

Distribution: see map in McCranie et al. 2020: 317 (Fig. 6). 
EtymologyThe specific name lineola, a noun in apposition, is Latin and means a diminutive line. The name is used in reference to the thin dorsolateral dark brown line or dorsal dark brown dashes found in this species.

Distribution: see map in McCranie et al. 2020: 317 (Fig. 6). 
References
  • 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
 
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