Liolaemus shehuen, Abdala, Cristian Simón, Gómez, Juan Manuel Díaz & Heredia, Viviana Isabel Juarez, 2012
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publication ID |
https://doi.org/ 10.5281/zenodo.246399 |
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DOI |
https://doi.org/10.5281/zenodo.6176421 |
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persistent identifier |
https://treatment.plazi.org/id/03A08780-7530-B06E-39E5-FF7CFD82F995 |
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treatment provided by |
Plazi |
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scientific name |
Liolaemus shehuen |
| status |
sp. nov. |
Liolaemus shehuen sp. nov.
( Figs. 4–7 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 )
1999 Cei and Scolaro Liolaemus fitzingerii, Revue francais de Aquariologie, 26, 79-82. 2007 Liolaemus sp7. Abdala C. S., Zootaxa, 1538, 84 pp.
Holotype. ― FML 22191. Adult male. 60 km west of Telsen , Telsen Department, Chubut Province, Argentina. C. S. Abdala, J. S. Abdala and M. Juarez cols. January 23, 2004. ( Figs. 4 View FIGURE 4 , 5 View FIGURE 5 ).
Paratypes. ― FML 22192-195.4 individuals. 1 male, 3 females. Same data as holotype.
FML 22204-205.2 individuals. 2 males, same data as holotype. FML 22217-219.3 individuals. 1 male, 2 females. 80 km west of Telsen , Telsen Department, Chubut Province, Argentina. C. S. Abdala, J. S. Abdala and M. Juarez cols. January 23, 2004.
Diagnosis.― Liolaemus shehuen belongs to the L. boulengeri group, characterized by having a patch of enlarged scales on the posterior medial surface of the thigh ( Etheridge 1995; Abdala 2007) and hypertrophy of the flexor tibialis internus muscle ( Abdala et al. 2006); tail long relative to body length, head proportionally longer than wide, palpebral ‘comb’ not developed, and more precloacal pores both in males and females than in the remaining species of the clade. Liolaemus shehuen differs from the species of the L. darwinii group ( Table 2) in having posterior teeth with expanded crowns and different body proportions, and in lacking a transversal black line on the eye. It differs from the species of the L. wiegmannii group ( Table 2) in having a row of lorilabial scales (never two or three). Liolaemus shehuen differs from L. boulengeri , L. donosobarrosi , L. goetschi , L. hermannunezi (Pincheira-Donoso, Scolaro & Schulte), L. inacayali (Abdala) , L. josei (Abdala) , L. loboi (Abdala) , L. martorii (Abdala) , L. rothi (Koslowskyi 1898) L. sagei (Etheridge & Christie) , L. senguer (Abdala) , L. tehuelche (Abdala) , and L. telsen (Cei & Scolaro) in having an evident black antehumeral arch that is absent in the aforementioned species. The species differs from all the species of the L. telsen group, except L. rothi and L. sagei , in having longer snout-vent length (max SVL 90.8 mm vs 32.3–77.1 mm). It differs from L. mapuche (Abdala) in having different dorsal body coloration, lacking light blue scales and having more marked ventral melanism. It differs from L. cuyanus in having more marked ventral melanism and different dorsal coloration.
Group Species
L. anomalus L. anomalus , L. ditadai , L. lentus and L. pseudoanomalus
L. abaucan , L. albiceps , L. calchaquí , L. chacoensis , L. cinereus , L. crepuscularis , L. darwinii , L. L. darwinii diaguita, L. espinozai , L. grosseorum , L. irregularis , L. koslowskyi , L. montanezi , L. laurenti , L.
lavillai, L. olongasta , L. ornatus , L. quilmes and L. uspallatensis
L. boulengeri , L. inacayali , L. josei , L. loboi , L. martorii , L. puelche , L. rothi , L. sagei , L. senguer ,
L. telsen L. tehuelche , and L. telsen
L. arambarensis , L. azarai , L. cuyumhue , L. lutzae , L. multimaculatus , L. occipitalis , L. rabinoi , L.
L. wiegmannii riojanus, L. salinicola , L. scapularis and L. wiegmannii
L. goetschi L. cuyanus , L. donosobarrosi , L. goetschi and L. mapuche
L. camarones , L. canqueli , L. casamiquelai , L. chehuachekenk , L. fitzingerii , L. melanops , L.
L. fitzingerii morenoi L. shehuen and L. xanthoviridis
Liolaemus shehuen sp. nov. belongs to the L. fitzingerii clade ( Abdala, 2007), which is characterized by its tricuspidate posterior teeth with expanded crowns, neck equal to or wider than head, cylindrical body, short limbs relative to the trunk, black antehumeral arch present and ventrally expanded, and males with ventral melanism.
Within the Liolaemus fitzingerii clade, L. shehuen sp.nov. has four to six scales in contact to mental (as the southern populations of L. fitzingerii ). In L. shehuen the head melanism characteristic of L. canqueli and L. melanops is absent. Liolaemus shehuen lacks the intense green dorsum with irregular, transverse black paravertebral spots of L. melanops , and the transverse black and yellow-orange bands of L. canqueli . Liolaemus shehuen differs from L. chehuachekenk in lacking a conspicuous vertebral band, having fewer individuals with pre- and postscapular spots, fewer ventral scales (109-121, mean=115.6 vs. 99-116, mean=106), and shorter snout-vent length (SVL 90.8 mm vs. 98.3 mm); it differs from L. fitzingerii in having shorter snout-vent length (SVL 90.8 mm vs. 106 mm), and lacking the bluish green or light blue dorsum coloration with red paravertebral spots and red scales speckled, as L. fitzingerii has. Liolaemus shehuen differs from L. morenoi in lacking evident scapular markings and having more ventral scales (109-121, mean=115.6 vs. 98-113, mean=107.6). L. morenoi never presents yellow-red dorsal coloration either. Liolaemus shehuen differs from L. xanthoviridis in having different dorsal and ventral coloration, with paravertebral spots and more uniform vertebral region without irregular markings.
Description of the holotype. ― Adult male. SVL 90.6 mm. Trunk length 45.1 mm. Head longer (17.4 mm) than wide (14.8 mm). Head height 11.6 mm. Eye diameter 4.3 mm. Interorbital distance 8.7 mm. Orbit–auditory meatus distance 6.6 mm. Auditory meatus 3.1 mm high, 1.6 mm wide. Orbit–commissure of mouth distance 2.5 mm. Internares distance 3.0 mm. Subocular scale length 5.4 mm. Femur length 13.5 mm, tibia 13.7 mm, and foot 25.6 mm. Humerus length 13.1 mm. Tail length 120.2 mm.
Dorsal surface of the head smooth, with 15 scales. Rostral wider than long, bordered by six scales. Mental larger than rostral, trapezoidal, bordered by four scales. Nasal not in contact with rostral. Four internasals. Nasal surrounded by eight scales, separated from canthal by two scales. Five scales between frontal and supercilliaries. Seven scales between frontal and rostral. Frontal not divided. Two postrostrals. Interparietal smaller than parietals, in contact with six scales. Orbital semicircles complete. Preocular separated from lorilabial row by one scale. Three scales in anterior margin of auditory meatus. Eleven smooth temporals. Three lorilabials in contact with subocular. Eight supralabials, none in contact with subocular. Eight supraoculars. Eight lorilabials. Five infralabials, second ventrally in contact with two scales. Six chinshields, second pair separated by three scales.
Seventy-six scales around midbody. Eighty-six round, slightly imbricate, slightly keeled dorsals from occiput to hind limbs. Thirty-six scale rows in dorsum. Scales of flank same size and shape as dorsals. Ventrals same size as dorsals, flat, imbricate. Thirty-five smooth, weakly imbricate gulars. Eight precloacal pores. Antehumeral scales flat, larger than or equal in size to dorsals. Postauricular, rectal, and longitudinal folds present. Scales on the longitudinal fold granular and smooth. Fourth finger with 19 subdigital lamellae; fourth toe with 26. Infracarpals flat, imbricate, trifid; infratarsals flat, imbricate, not trifid.
C olor in life.― Head grey with scattered red spots and scales on the temporal and occipital region. Conspicuous antehumeral arch. Dorsum and flanks yellow-red with faint, small paravertebral spots. Some of these spots on the posterior region have a lighter spot inside. Vertebral region orange, with two light grey stripes on each side of vertebral region. Dorsal fore- and hind limbs same color as trunk. Dorsal tail greenish grey with yellow and orange scales on flanks and at tail base. Throat pale white-yellow. Gular region, chest to cloacal region and ventral hind limbs melanic. Flanks, forelimbs and ventral tail same color as throat.
Variation.― (Table 3). Based on 10 specimens. Head longer (14.8–17.9 mm; mean = 16.4 mm) than wide (11.9–14.8 mm; mean = 13.4 mm). Head height 9.8–11.6 mm (mean = 10.7 mm). Neck wider than head. SVL 72.7–90.8 mm (mean = 79.9 mm), averaging 2.1 times longer than trunk. Tail length 94.9–120.3 mm (mean = 109.6 mm). Humerus length 9.7–13.1 mm (mean = 11.4 mm). Dorsal surface of head smooth, with 14–18 scales. One row of lorilabials, same size as supralabials. Six to nine lorilabials. Seven to 10 supralabials. Frontal unique or divided horizontally, into two or four scales. Interparietal always smaller than parietals, surrounded by 6–8 scales. Nasal surrounded by 8–9 scales. Five to seven infralabials. Mental in contact with four or six scales. Ten to 11 smooth round temporals. Longitudinal, postauricular, and antehumeral folds present. Horizontal fold Y-shaped between shoulder and auditory meatus.
Scales around midbody 69–80 (mean = 74). Gulars 28–35 (mean = 31.5). Dorsal scales between occiput and hind limbs 63–88 (mean = 77.6). Ventrals 110–119 (mean = 117.3). Males with 8–9 (mean = 8.2) precloacal pores. Females with 0–3 (only one female) (mean = 0.5) precloacal pores. Dorsals flat, slightly imbricate, slightly keeled. Seventeen to 20 infradigital lamellae on fourth finger and 22–29 on fourth toe.
Variation in color pattern. ― No sexual dichromatism evident ( Figs. 6–7 View FIGURE 6 View FIGURE 7 ). Head usually grey or light brown with small yellow-orange spots or scales. Black arch ventrally expanded over antehumeral fold. Dorsal trunk and limbs yellow-orange or yellow-red, more intense in some specimens. Faint and small round paravertebral spots, generally dark, but sometimes preceded by a lighter spot. Some specimens have one or two dorsolateral whiteyellow strips and/or vertebral line of same color as paravertebral spots. Some specimens have diffuse white-yellow bars transversal to the body axis. Lateral region of the body same color as dorsum. Tail uniformly bluish grey or greenish grey with scattered spots. Gular region, chest to cloacal region, anterior forelimbs and hind limbs have ventral melanism. Males more melanic than females. In juveniles melanism expands from gular region to cloacal region as the individual grows.
Natural history.― Liolaemus shehuen sp. nov. was found in the Telsen plateau and nearby regions, along National Route 4, an area with sand dunes and abundant vegetation, an ecotone between the phytogeographic regions of Monte and Patagonia ( Cabrera & Willink 1980). The soil is mostly sandy with basaltic rocks, surrounding a lowland with red soils called ‘Bajo de la tierra colorada’. The vegetation consists mainly of Stipa , Verbena , Mulinum , Nassauvia and Lycium ( Cei & Scolaro 1999) .
The Patagonian plateaus ( Telsen , Somuncurá in Río Negro and Chubut provinces, and Buenos Aires Lake, in Santa Cruz Province) are areas with high herpetofauna diversity. Liolaemus shehuen sp. nov. is sympatric with Diplolaemus darwinii (Bell) , Homonota darwinii (Boulenger) , L. bibronii (Bell) , L. petrophilus (Donoso-Barros & Cei) , L. rothi , L. telsen , Leiosaurus belli (Duméril & Bibron) , Pristidactylus nigroingulus (Cei, Scolaro & Videla) , the snakes Philodryas patagoniensis (Girard) , Philodryas trilineata (Burmesteir) , and the viperid Bothrops ammodytoides (Leybold) .
Liolaemus shehuen is oviparous and insectivorous. It is active between 12.00 AM and 15:00 PM, when the sand temperature is highest. There is no more information about its biology.
Distribution.― Liolaemus shehuen is distributed on the Telsen plateau and east of Río Negro Province, Argentina ( Fig. 8 View FIGURE 8 ).
Etymology.― shehuen is a Tehuelche word that means 'Sun', and makes reference to the dorsal coloration of Liolaemus shehuen . The tehuelches, also known as Patagones, are ancient indigenous people that have inhabited Patagonia for more than 10000 years.
| FML |
Fundacion Miguel Lillo |
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