Plestiodon bilineatus (TANNER, 1958)
Can you confirm these amateur observations of Plestiodon bilineatus?
Plestiodon bilineatus
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| Higher Taxa | Scincidae, Scincinae, Scincoidea, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Two-lined Short-nosed Skink S: Alicante de Dos Lineas |
| Synonym | Eumeces brevirostris bilineatus TANNER 1958: 59 Eumeces brevirostris bilineatus — DIXON 1969 Eumeces brevirostris bilineatus — WEBB 1984 Plestiodon brevirostris bilineatus — GARCIA-VÁZQUEZ & FERIA-ORTIZ 2006 Eumeces brevirostris bilineatus — LEMOS-ESPINAL et al. 2004 Plestiodon brevirostris bilineatus — LINER 2007 Plestiodon bilineatus — FERIA-ORTIZ et al. 2011 Plestiodon brevirostris bilineatus — FERIA-ORTIZ & GARCÍA-VÁZQUEZ 2012 Plestiodon bilineatus — BRANDLEY et al. 2012 Plestiodon bilineatus — CRUZ-SÁENZ et al. 2017 |
| Distribution | Mexico (Chihuahua, Durango, Jalisco) Type locality: 10 miles southwest of El Salto, Durango, Mexico |
| Reproduction | oviparous. |
| Types | Holotype: KU No. 44732; Charles M. Fugler; June 28, 1955. PARATYPES: KU. 44728 , 44730 , 44731, 9 miles southwest of El Salto, Durango, México; Charles M. Fugler and Robert G. Webb; June 2628, 1955. Nos. 44726 , 44729 , same locality as holotype; Rollin H . Baker and Robert G. Webb; June 25, 1955. No. 44727, 15 miles southwest of El Salto, Durango, Mexico; Charles M. Fugler; June 25 , 1955. |
| Diagnosis | Diagnosis (n=10): Dorsolateral stripe distinct from rostral to the base of the tail. Lateral stripe absent and with the lighter ventral color blending with the lower edge of the lateral dark stripe. The seventh supralabial and upper secondary temporal very large and in broad contact. Primary temporal or lower secondary temporal missing and when present small. Interparietal small, deeply enclosed by the parsetals and widely separated from the frontal. The latter scute is large and in narrow to wide contact with the frontonasal which is nearly twice as wide as long. Adpressed legs are separated by 2-10 scales in adults. (Tanner 1958) Additional details (41 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Subspecies: FERIA-ORTIZ et al. 2011 provide evidence that P. b. brevirostris, P. b. bilineatus, P. b. dicei, and the eastern populations of P. b indubitus (from Morelos, Guerrero, and México) represent distinct species, whereas the western populations of P. b. indubitus (from Colima and Jalisco) represent an undescribed species. The data cannot resolve whether P. b. pineus is conspecific with P. b. dicei or P. b. dicei is a paraphyletic ( = nonexclusive) species relative to an exclusive P. b. pineus. Thus, the status of P. b. pineus remains uncertain. The haplotype phylogeny also suggests that P. b. brevirostris may represent more than one species. BRANDLEY et al. (2012) showed that bilineatus, dicei, and indubitus are paraphyletic with respect to other species and thus need to be split up. Reference images: see Uetz et al. 2024 for high-resolution reference images for this species. |
| Etymology | From the Latin bilīneātus meaning doubly lined in allusion to its coloration. |
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