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Marisora aquilonaria MCCRANIE, MATTHEWS & HEDGES, 2020

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Higher TaxaScincidae, Mabuyinae, Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Southern Sierra Madre Skink 
SynonymMarisora aquilonaria MCCRANIE, MATTHEWS & HEDGES 2020
Mabuia agilis — GADOW 1905: 195 (in part).
Mabuya mabouya — DUNN 1936: 537 (in part).
Mabuya mabouya mabouya — DUNN 1936: 544 (in part)
Mabuya mabouya mabouya — GAIGE et al. 1937: 11 (in part)
Mabuya mabouya mabouya — OLIVER 1937: 15
Mabuya mabouya mabouya — SMITH & TAYLOR 1950: 156 (in part)
Mabuya mabouya mabouya — DAVIS & SMITH 1953: 105
Mabuya mabouya mabouya — FLORES-VILLELA et al. 1991: 161
Mabuya mabouya alliacea — BURGER 1952: 186 (in part)
Mabuya mabouya alliacea — DUELLMAN 1954: 20
Mabuya mabouya alliacea — PETERS 1954: 15
Mabuya mabouya alliacea — DUELLMAN 1958: 16
Mabuya mabouya alliacea — PETERS 1960: 331;
Mabuya mabouya alliacea — FLORES-VILLELA et al. 1991: 161.
Mabuya brachypoda — WEBB 1958: 1311 (in part)
Mabuya brachypoda — DAVIS & DIXON 1961: 49
Mabuya brachypoda — DUELLMAN 1961: 77
Mabuya brachypoda — FLORES-VILLELA et al. 1991: 160
Mabuya unimarginata — GARCÍA-VÁZQUEZ et al. 2006: 168
Mabuya unimarginata — MIRALLES et al. 2009b: 602
Mabuya unimarginata — MIRALLES & CARRANZA 2010: 861 (in part)
Mabuya unimarginata — MACIP-RIOS et al. 2012: 103.
Mabuya unimarginata complex — MIRALLES et al. 2009a: 68 (in part)
Mabuya unimarginata complex — PINTO-SÁNCHEZ et al. 2015: 204 (in part; by implication only).
Marisora brachypoda — HEDGES & CONN 2012: 24 (in part)
Marisora brachypoda — LARA-RESENDIZ et al. 2017: 226 (in part) 
DistributionMexico (Michoacán)

Type locality: Hacienda El Sabino, 30 km S of uruapan, Michoacán, Mexico, 19°16’59.881”N, -101°58’0.1117”W, 1050 m elevation  
Reproduction 
TypesHolotype. FMNH 103565, an adult male, collected 21 July 1936, by Hobart M. Smith.
Paratypes (15). Mexico—Michoacán: FMNH 103562, 103575, 103575, 104590, 104592, 104606, 117144, adult males, FMNH 103576, 117129–30, 117132–33, adult females, all from type locality; Colima: FMNH 1650, adult female, Manzanillo; FMNH 1673, adult male, Paso del Río; Guerrero: USNM 113639, adult female, Paso de Limonaro.
Additional specimens: FMNH, USNM, KU, SMF 
DiagnosisDiagnosis. Marisora aquilonaria sp. nov. is a relatively small, short-limbed species of the genus characterized (data from 8 males, 8 females in type series) by (1) maximum known SVL in males 68.6 mm; (2) maximum known SVL in females 75.2 mm; (3) SW 3.1–4.3% SVL in males, 2.8–3.9% in females; (4) HL 19.3–21.6% SVL in males, 16.3–20.9% in females; (5) HW 12.2–14.1% SVL in males, 10.5–12.7% in females; (6) EAL 1.6–2.5% SVL in males, 1.3–2.4% in females; (7) Toe IV length 8.4–10.4% SVL in males, 8.0–9.8% in females; (8) prefrontals one per side; (9) supraoculars four per side; (10) supraciliaries 4–5 per side, most often 5 (81.3%); (11) frontoparietals one per side; (12) usually fifth supralabial below orbit (80.0%), occasionally sixth below orbit (20.0%); (13) nuchal rows one per side; (14) dorsals 52–55 (54.3 ± 1.3) in males, 50–59 (54.6 ± 3.1) in females; (15) ventrals 55–62 (57.9 ± 2.0) in males, 55–60 (58.5 ± 1.8) in females; (16) dorsals + ventrals 110–117 (112.6 ± 3.4) in males, 105–120 (113.6 ± 5.0) in females; (17) scales around midbody usually 28 (87.5%), 27 in 12.5%; (18) Finger IV lamellae 12–15 (12.6 ± 1.1) per side in males, 10–15 (12.3 ± 1.4) in females; (19) Toe IV lamellae 14–15 (14.5 ± 0.5) per side in males, 13–15 (14.0 ± 0.8) in females; (20) Finger IV + Toe IV lamellae 26–29 (27.1 ± 1.0) per side in males, 25–30 (26.3 ± 1.6) in females; (21) supranasals usually in medial contact and preventing frontonasal-rostral contact (93.3%); (22) prefrontals not in contact; (23) supraocular 1-frontal contact almost always absent (87.5%), except contact made on both sides in 6.3%, and point contact made on one side in 6.3%; (24) parietals in contact posterior to interparietal; (25) pale middorsal stripe absent, but some have small dark brown dorsal spots; (26) thin, indistinct dark brown dorsolateral stripe usually absent, occasionally present above upper edge of an occasionally present, indistinct, thin, pale dorsolateral stripe; (27) dark brown lateral stripe present; (28) distinct white lateral stripe present; (29) palms and soles pale brown or cream; (30) total lamellae for five fingers 41–50 (45.0 ± 3.1) in males, 41–51 (43.9 ± 3.6) in females; (31) total lamellae for five toes 49–53 (50.3 ± 2.4) in males, 42–53 (49.9 ± 3.4) in females. In addition, this is a short-limbed species with combined FLL + HLL/ SVL 53.4–57.8% in males, 50.8–57.2% in females and has two chinshields contacting infralabials (Table 3).
Marisora aquilonaria sp. nov. is a member of the M. alliacea Group of Middle American Marisora and forms a monophyletic clade (Fig. 3). Marisora aquilonaria is a relatively small species as is M. syntoma sp. nov. (see next Description). Marisora aquilonaria can be distinguished from M. syntoma in having 5 supraciliaries per side in 81.3% (versus 4 supraciliaries per side in 96.7% in M. syntoma) and having combined Finger IV and Toe IV lamellae per side of 26–29, x = 27.1 ± 1.0 in males and 25–30, x = 26.3 ± 1.6 in females (versus 22–26, x = 23.7 ± 1.4 combined Finger IV and Toe IV lamellae per side in males and 22–27, x = 24.1 ± 1.8 in females in M. syntoma). Marisora aquilonaria is distinguished from all remaining Mexican and Central American Marisora species by being smaller with a maximum known SVL of 68.6 mm in males and 75.2 mm in females (versus 77.0 mm in males of M. urtica sp. nov. [female M. urtica unknown], 81.0 mm in males and 89.0 mm in females of M. brachypoda), 80.9 mm in males and 92.5 mm in females of M. lineola, 76.1 mm in males and 90.2 mm in females of M. roatanae, 85.7 mm in males and 95.1 mm in females of M. magnacornae, 79.0 mm in males and 90.3 mm in females of M. alliacea, and 84.0 mm in males and 90.3 mm in females of M. unimarginta). Marisora aquilonaria is further distinguished from M. urtica by lacking any indication of dark dorsal lines (versus those lines indicated in M. urtica and by having 5 supraciliaries per side in 81.3% (versus 4 superciliaries in M. urtica). Marisora aquilonaria differs further from M. brachypoda by having a tiny fifth supraciliary scale present posteriorly in 81.3% (versus that small scale absent in 96.7% of M. brachypoda). Marisora aquilonaria differs further from M. lineola by lacking distinct dark and pale dorsolateral stripes (versus dark brown dorsolateral stripe or dashes suggestive of stripes present and a pale brown dorsolateral stripe present in M. lineola). Marisora aquilonaria differs further from M. roatanae by having fewer toe lamellae for five toes (49–53, x = 50.3 ± 2.4 in males and 42–53, x = 49.9 ± 3.4 in females versus 55–62, x = 60.3 ± 0.5 in males and 54–61, x = 59.0 ± 2.7 in females in M. roatanae. Marisora aquilonaria differs further from M. magnacornae and M. alliacea) by having shorter limbs (FLL + HLL/SVL 53.4–57.8% in males and 50.8–57.2% in females versus 60.8–68.7% in males and 55.8–68.0% in females of M. magnacornae and 62.5–74.6% and 58.0–67.6%, respectively, in M. alliacea). Marisora aquilonaria differs further from M. alliacea in having pale palms and soles (versus palms and soles dark in M. alliacea). Marisora aquilonaria differs from the extralimital M. pergravis by having fewer ventrals (55–62 in both sexes combined versus 70–73 in M. pergravis), fewer dorsals (50–59 versus 62–63 in M. pergravis), and having a dark lateral stripe (versus that stripe absent in M. pergravis). Marisora aquilonaria has been previously confused with M. unimarginata of the M. unimarginata group, but besides the size differences discussed above, also differs from M. unimarginata by having shorter limbs (FLL + HLL/SVL 53.4–57.8% in males and 50.8–57.2% in females versus 56.9–66.9% and 55.9–69.1%, respectively, in M. unimarginata). Marisora aquilonaria 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; furthermore a huge geographical hiatus inhabited by other species of Marisora occurs between those two species. 
CommentSynonymy: after MCCRANIE et al. 2020, see there for references.

Distribution: see map in McCranie et al. 2020: 317 (Fig. 6). 
EtymologyThe specific name aquilonaria is a Latin feminine adjective derived from aquilonaris, which means north, northern, northerly. The name is used in reference to this nominal form being the most northerly known species of Marisora. 
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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