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Liolaemus yalguaraz ABDALA, QUINTEROS & SEMHAM, 2015

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Higher TaxaLiolaemidae, Iguania, Sauria, Squamata (lizards) 
Common Names 
SynonymLiolaemus yalguaraz ABDALA, QUINTEROS & SEMHAM 2015
Liolaemus bibronii — CEI 1973 (part)
Liolaemus bibronii — CEI & ROIG 1973
Liolaemus bibronii — CEI 1982: fig. 1 (part)
Liolaemus bibronii — VIDELA 1983
Liolaemus bibronii — CEI 1986
Liolaemus bibronii — RAMÍREZ-PINILLA 1992
Liolaemus bibronii — AVILA et al. 1992
Liolaemus bibronii — PINCHEIRA-DONOSO & NÚÑEZ 2005: 211 (part)
Liolaemus bibronii — CORBALÁN & DEBANDI 2008 (part)
Liolaemus bibronii — AVILA et al. 2013 (part: table 2) 
DistributionArgentina (Mendoza)

Type locality: Uspallata, Pampa de Yalguaraz, Las Heras Department, Mendoza Province, Argentina (32°19’59.0”S, 69°22’54.5”W), 2,325 m elevation  
TypesHolotype: FML 27622. Male. Collectors: C.S. Abdala, J.L. Acosta, A. Laspiur and R. Semhan. November 2010.
Paratypes: FML 27623–27634. MCN 5068–5069. Five males and nine females collected with the holotype. 
CommentSynonymy: after Abdala et al. 2015.

Diagnosis: Liolaemus yalguaraz is a slender, small Liolaemus belonging to the L. alticolor-bibronii group sensu Quinteros (2012, 2013). The character states that support the L. alticolor-bibronii group include small body (60 mm snout–vent length; SVL) and a distinct dorsal color pattern formed by dorsolateral stripes, paravertebral spots, and vertebral and ventrolateral lines. In some species, one of these character states may be absent. The species of the L. alticolor-bibronii group also have fine gray to black markings on the ventral surface of the tail and share a generally terrestrial lifestyle, with the exception of L. saxatilis and L. pagaburoi, which are saxicolous. Table 1 shows a comparison between L. yalguaraz and the phylogeneti- cally and geographically closest species of the L. alticolor- bibronii group.
The dorsal surface of the head of Liolaemus yal- guaraz is smooth, differing from L. bitaeniatus Laurent, 1984, L. exploratorum Cei and Williams, 1984, L. lemniscatus Gravenhorst, 1838, L. pagaburoi Lobo and Espinoza, 1999, L. saxatilis Avila and Cei, 1992, L. tac- nae Shreve, 1941, and L. variegatus Laurent, 1984, (ru- gose dorsal surface of head). The upper temporal scales of L. yalguaraz are weakly keeled, differing from L. abdalai, L. aparicioi Ocampo, Aguilar-Kirigin and Quinteros, 2012, L. bitaeniatus, L. lemniscatus, L. nitidus Wiegmann, 1834, L. robertmertensi Hellmich, 1964, L. saxatilis, L. var- iegatus (keeled temporal scales), and from L. bibronii, L. gracilis Bell, 1843, L. paulinae Donoso-Barros, 1961, L. pachacutec, L. puna Lobo and Espinoza, 2004, L. tacnae, and L. walkeri (smooth temporal scales). The smooth neck scales of L. yalguaraz distinguish it from L. abdalai, L. bi- taeniatus, L. chaltin Lobo and Espinoza, 2004, L. cyaneino- tatus, L. fuscus, L. incaicus Lobo, Quinteros, and Díaz Gómez, 2007, L. pyriphlogos Quinteros, 2012, L. lemniscatus, L. nitidus, L. paulinae, L. pagaburoi, L. ramirezae Lobo and Espinoza, 1999, L. robertmertensi, L. saxatilis, L. tandilien- sis Vega, Bellagamba, and Lobo, 2008, and L. variegatus, which have keeled neck scales. Liolaemus yalguaraz exhibits 29–32 scales on neck, more than in L. abdalai (20–25), L. cyaneinotatus (13–17), L. gracilis (22–26), L. lemniscatus (20–29), L. robertmertensi (18–23), L. saxatilis (18–25), and L. tandiliensis (20–27), and fewer than in L. explor- atorum (34–41). Gular scales are 33–40 in the new tax- on, more than in L. abdalai (25–28), L. alticolor Barbour, 1909, (27–21), L. bitaeniatus (24–32), L. gracilis (25–33), L. incaicus (20–28), L. pagaburoi (24–33), L. robertmertensi (20–27), L. tacnae (28–32). The auricular scale is conspic- uous in L. yalguaraz, being absent in L. curicencis Müller and Hellmich, 1938.
The number of scales around the midbody is greater in Liolaemus yalguaraz (45–52) than in L. abdalai (33–40), L. bitaeniatus (37–46), L. gracilis (36–44), L. robertmer- tensi (31–37), L. saxatilis (31–46), L. variegatus (39–45) and lower than L. cyaneinotatus (60–68). Dorsal scales in L. yalguaraz are lanceolate, imbricate, keeled, and with a tiny mucron. Those character states distinguish the new taxon from L. alticolor, L. chavin, L. pachacutec, L. paulinae, L. tacnae, and L. tandiliensis (without mucron), from L. aparicioi, L. bibronii, and L. chungara (dorsal with evident mucron), and from L. bitaeniatus and L. wari (rhomboidal dorsal scales). The number of scales between the occiput and thighs is 49–54 in L. yalguaraz, which distinguishes it from L. abdalai (34–42), L. alticolor (38–43), L. apari- cioi (39–46), L. bitaeniatus (35–46), L. chungara (28–49), L. gracilis (37–48), L. incaicus (40–47), L. lemniscatus (31– 47), L. pagaburoi (32–43), L. pseudolemniscatus (36–42), L. robertmertensi (33–40), L. saxatilis (35–46), and L. var- iegatus (32–46). Also, L. yalguaraz possesses more ventrals (81–91) than L. abdalai (62–78), L. alticolor (62–73), L. bi- taeniatus (70–81), L. robertmertensi (59–76), and L. tacnae (76–81). Male SVL is greater in L. yalguaraz (51–60 mm) than in L. abdalai (43–48 mm), L. alticolor (44 mm), L. fuscus (39–51 mm), L. pseudolemniscatus (46–47 mm), and L. tacnae (43–48 mm).
The dorsal color pattern is golden-reddish in Liolae- mus yalguaraz, whereas it is gray-brownish in L. bibronii. The presence of paravertebral spots distinguishes L. yal- guaraz from L. alticolor, L. chaltin, L. chungara, L. gracilis, L. puna, L. ramirezae, L. tacnae, and L. yanalcu Martinez Ol- iver and Lobo, 2002. Other members of the group exhibit paravertebral spots that differ in shape, being bar shaped in L. abdalai, L. lemniscatus, L. pagaburoi, L. robertmertensi, L. saxatilis, and L. variegatus and rounded in L. bibronii, L. exploratorum, L. incaicus, L. sanjuanensis Cei, 1982, and L. tandiliensis (Fig. 1). Dorsolateral stripes are evident in L. yalguaraz, which distinguishes it from L. yanalcu (dor- solateral stripes absent). Also, the width of dorsolateral stripe in L. yalguaraz (1 scale wide) differs from L. chaltin, L. incaicus, L. pyriphlogos, L. lemniscatus, and L. saxatilis, in which the dorsolateral stripes are 2–2.5 scales wide. The presence of a vertebral line in L. yalguaraz distinguishes this taxon from L. abdalai, L. bitaeniatus, L. exploratorum, L. incaicus, L. lemniscatus, L. robertmertensi, L. sanjuanen- sis, L. saxatilis, and L. tacnae, in which the vertebral line is absent, and from L. curicencis, in which the vertebral line cane be present or absent. Also, in L. yalguaraz the vertebral line extends along the dorsal surface of tail, being absent in L. exploratorum, L. lemniscatus, L. robert- mertensi, L. sanjuanensis, L. saxatilis, and L. tacnae. Males of L. chavin, L. pachacutec, L. wari, and L. walkeri exhibit partial or total ventral melanism, which is absent in L. yalguaraz. 
EtymologyThe specific epithet yalguaraz refers to the Pampa de Yalguaraz, where Liolaemus yalguaraz sp. nov. occurs, and is used as a noun in apposition. Yalguaraz is derived from the Huarpe “Llaiguaraz,” 
  • Abdala, Cristian Simón; Andrés Sebastián Quinteros, and Romina Valeria Semham 2015. A New Species of Liolaemus of the Liolaemus alticolor-bibronii Group (Iguania: Liolaemidae) from Mendoza, Argentina South American Journal of Herpetology Aug 2015, Vol. 10, No. 2: 104-115, doi: 10.2994/SAJH-D-14-00033.1 - get paper here
  • Avila L J. CEI J M. MARTORI R A. ACOSTA J C. 1992. A new species of Liolaemus of the bibroni group from granitic ravines of Achiras Sierra de Comechingones, Cordoba Argentina (Reptilia: Tropiduridae). Boll. Mus. Reg. Sci. Nat. Torino 10 (1): 101-111.
  • AVILA, LUCIANO JAVIER; LORENA ELIZABETH MARTINEZ & MARIANA MORANDO 2013. Checklist of lizards and amphisbaenians of Argentina: an update. Zootaxa 3616 (3): 201–238
  • Cei J M 1982. A new endemic lizard from Sierra Pie de Palo in western Argentina. Journal of Herpetology 16 (2): 179-182 - get paper here
  • Cei,J.M. 1973. Herpetología patagónica. VII. Notas ecológicas y morfológicas sobre Liolaemus bibroni y L. boulengeri (Sauria: Iguanidae). Physis, 32: 459-469
  • Cei,J.M. & ROIG,G.V. 1973. Fauna y ecosistemas del Oeste arido argentino. I. Reptiles de la Provincia de Mendoza. Deserta 4: 69-91
  • Corbalán V., Debandi G. 2008. La lacertofauna de Mendoza: lista actualizada, distribución y riqueza. Cuadernos de Herpetología 22:5–24
  • PINCHEIRA-DONOSO, Daniel & HERMAN NÚÑEZ 2005. The Chilean species of the genus Liolaemus Wiegmann, 1834 (Iguania, Tropiduridae, Liolaeminae). Taxonomy, systematics and evolution [in Spanish] Mus Nac Hist Nat Chile Publ Ocas 59: 1-486
  • Ramírez-Pinilla M.P. 1992. Actividad reproductiva en tres especies simpátricas del género Liolaemus (Reptilia: Sauria: Tropiduridae). Caldasia 17: 67–74
  • Videla F. 1983. Hábitos alimenticios en iguánidos del oeste árido de la Argentina Deserta 7:192–202
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