Three New Species of the Liolaemus Elongatus Group (Iguania: Liolaemidae) from Argentina
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Cuad. herpetol., 2424 (2):(2): 9393–109,–109, 20102010 93 THREE NEW SPECIES OF THE LIOLAEMUS ELONGATUS GROUP (IGUANIA: LIOLAEMIDAE) FROM ARGENTINA CRISTIAN SIMÓN ABDALA1,2, ANDRÉS SEBASTIÁN QUINTEROS3, GUSTAVO JOSÉ SCROCCHI1 & JUAN CARLOS STAZZONELLI2 1 Conicet – Instituto de herpetología, Fundación Miguel Lillo. 2 Facultad de Ciencias Naturales e IML. Miguel Lillo 251. (4000) Tucumán. Argentina. [email protected] 3 IBIGEO (Instituto de Bio y Geociencias del NOA).Universidad Nacional de Salta – CONICET. Av. Bo- livia 5150. (4400) Salta. Argentina. [email protected] R E S U M E N. — Describimos tres nuevas especies de Liolaemus del Sur de Argentina. Estas nuevas especies pertenecen al grupo de Liolaemus elongatus, grupo monofilético incluido en el subgénero Liolaemus sensu stricto. Dos de las nuevas especies habitan en el sur de la Provincia de Mendoza y la otra en el centro-oeste de la provincia de Río Negro. Las nuevas especies pre- sentan estados de caracteres que las diferencian de todos los miembros del grupo de L. elongatus. Esos estados de carácter incluyen al patrón de coloración, número de escamas en el dorso, forma de las escamas temporales y tamaño (entre otros). Aunque con estas nuevas especies se dilucida el status taxonómico de varias poblaciones pertenecientes al grupo de L. elongatus, muchas que- dan inciertas aún. PALABRAS CLAVE: Liolaemus, grupo elongatus, Patagonia, nuevas especies. A B S T R A C T. — We describe three new species of Liolaemus from Southern Argentina. These new species belong to the monophyletic Liolaemus elongatus group, included within the subgenus Liolaemus sensu stricto. Two of the new species inhabits in southern Mendoza Province and the other one inhabits in central west Río Negro Province. The new species exhibit character states that distinguish they from all other members of the L. elongatus group. Those character states include color pattern, number of scales in dorsum, shape of temporal scales, and size (among others). Although with those new species we clarify the taxonomic status of several populations which belongs to the L. elongatus group, many remain unknown. KEYWORDS: Liolaemus, elongatus group, Patagonia, new species. INTRODUCTION vided the Genus in two main groups (Subgenera: Liolaemus sensu stricto, The taxonomic composition of the and Eulaemus), and in several sub- genus Liolaemus, an specious South groups included (Laurent, 1983, 1985; American lizard, has growing up during Etheridge, 1995, 2000; Abdala, 2007; the last decade (Abdala et al., 2008; Ab- Lobo, 2001, 2005; Avila et al., 2006; dala et al., 2009; Avila et al. 2008; Avila Morando, 2007; Espinoza et al., 2004; et al., 2010; Lobo et al., 2007; Lobo et Schulte et al., 2000, among much oth- al., 2010; Quinteros et al., 2008a,b), in- ers). Inside the Liolaemus sensu stricto creasing its specific number to 223 (the most studied group) is found a (Lobo et al., 2010). These lizards inhab- group primarily defined by Cei (1974), its in diverse microhabitat, distributed the Liolaemus elongatus group. Later, from Tierra del Fuego to central Peru. Espinoza et al. (2000) re-defined this The taxonomic and phylogenetic studies group, composed by: L. austromendoci- carried out in this particular group di- nus (Cei, 1974), L. capillitas (Hulse, Recibido: 10/11/10 — Revisado: 24/11/10 — Aceptado: 29/11/10 Ed. asoc.: F. Lobo 94 C. S. ABDALA et al.: Three new species of Liolaemus 1979), L. elongatus (Koslowsky, 1896), them inhabit in southwestern Mendoza L. heliodermis (Espinoza, Lobo, and Province, whereas the other inhabit in Cruz, 2000), L. petrophilus (Donoso Bar- central western Río Negro Province. ros and Cei, 1971), and L. thermarum (Videla and Cei, 1996). Liolaemus umb- rifer was added to the group after its MATERIALS AND METHODS description (Espinoza & Lobo, 2003). These species are distributed in west We studied specimens that belong to Argentina, from Catamarca, in the the Liolaemus elongatus group and addi- north, to Chubut, in the south. Posteri- tional specimens of other species of the or phylogenetic analyses (Lobo, 2005; Liolaemus sensu stricto subgenus. Díaz Gómez and Lobo, 2006) defined a Morphological characters commonly new group (Liolaemus capillitas group), used for Liolaemus taxonomy were con- which include the Northern distributed sidered, as described in Laurent (1985); species of L. elongatus group, formed by Etheridge (1993, 1995, 2000), Cei (1986), L. capillitas, L. heliodermis, L. dicktra- Lobo (2001), and Abdala (2007). Descrip- cyi (Espinoza and Lobo, 2003) and L. tion of color in life was made based on umbrifer. photographs taken at the time of cap- In phylogenetic analyses performed ture. Description of body color patterns by Morando et al. (2003) and Avila et follows Lobo and Espinoza (1999). Squa- al. (2004), these species are included in mation characters were taken with a two more inclusive groups named L. microscope (10-40X), measurements elongatus and L. petrophilus groups. were obtained using caliper to the near- The L. capillitas group proposed by Lobo est 0.02 mm. Specimens were captured (2001, 2005) and recovered by Díaz by noosing or hand, sacrificed with sodi- Gómez and Lobo (2006) is included in um pentothal 1%, fixed in 10% formalin the L. petrophilus group proposed by and later preserved in 70% ethanol. Morando et al. (2003) and Avila et al. Specimens used in the study are listed (2004). Liolaemus talampaya (Avila et in the Appendix 1. al., 2004) is recovered in a clade which includes species member of the L. capil- litas group following the phylogenetic RESULTS hypothesis of Lobo (2005). Recently two new species were described, L. tulkas Comparison between new species and and L. parvus (Quinteros et al., 2008a) other members of the Liolaemus elong- the first one belonging to the L. capill- atus group are showed in Table 1. itas group, and the second one also in- cluded in the petrophilus group and re- Liolaemus smaug sp. nov. lated to L. austromendocinus and L. Figs 1-4 gununakuna according to (Morando et 1974 Liolaemus elongatus elongatus Cei, J. M., al., 2003 and Avila et al., 2004). Recent- J. Herp. 8:219-229. ly, Lobo et al., (2010) proposed the L. 1998 Liolaemus elongatus Cei, J. M. and L. J. elongatus group (including the L. capill- Avila, Facena, 14:75-80. itas group) which resemble the elonga- tus – kriegi complex (without the kriegi Holotype.— FML 22449: Between Las group) of Morando et al., (2003) and Loicas and Volcán Peteroa Provincial Avila et al., (2004). Road 186, (35º39’51,3” S; 70º12’00,9”W, In this work we describe three new 1688 m.), Malargüe Department, Mendo- species of Liolaemus, which belong to za Province, Argentina. Abdala, Scrocc- the more inclusive Liolaemus elongatus chi, Nori, Martinez, Carrizo, cols. Octo- group (sensu Lobo et al., 2010). Two of ber 2008. Cuad. herpetol., 24 (2): 93–109, 2010 95 Character states of the Liolaemus petrophilus group members. Modified from Espinoza and Lobo, 2003. Table 1. 96 C. S. ABDALA et al.: Three new species of Liolaemus Figure 1. Liolaemus smaug sp. nov. Holotype in dorsal view. Figure 2. Liolaemus smaug sp. nov. Holotype ventral view. Figure 3. Liolaemus smaug sp. nov. Female in dorsal view. Figu- re 4. Liolaemus smaug sp. nov. Female in ventral view. Paratypes.— FML 22444 – 448 and capillitas group (Lobo, 2005) who inhabit FML 22451: Same locality and date of in Northwestern Argentina and differs the holotype. FML 23817-18: 11 km of them because the lack of red colora- from Las Loicas, on the provincial road tion on cloacal region and tiny spots 186 to Paso Pehuenche, Malargüe De- spread in shoulder region (both charac- partment, Mendoza Province, Argenti- ter sates are synapomorphies of the L. na. Abdala, Juarez, Robles cols. Febru- capillitas group, sensu Lobo, 2005). Li- ary 2006. olaemus smaug differs from all mem- bers of the L. petrophilus group in hav- Etymology.— In Tolkien’s mythology ing a distinct color pattern and in char- Smaug, the Golden, is the last of the acter states of lepidosis. It differs from Middle Earth dragons. The name Li- the southern members of the L. petro- olaemus smaug is because this new spe- philus group (L. austromendocinus, L. cies exhibit a golden coloration on elongatus, L. gununakuna (Avila, Moran- body. do, Perez, and Sites, 2004), L. petrophi- lus, and L. thermarum) because it has a Diagnosis.— A slender, medium size Li- small SVL (max SVL 71.25 mm in L. olaemus (Max SVL 71.25 mm), which smaug vs. 81 – 103 mm). Dorsal scales belong to the L. chiliensis group, partic- have a distinct keel in L. smaug, while ularly in the L. elongatus group (sensu in L. austromendocinus the dorsal Lobo et al. 2010). Inside this group the scales are weakly keeled. Temporal new species is distributed far away scales are keeled in L. elongatus, L. south from the members of the L. petrophilus, and L. thermarum while in Cuad. herpetol., 24 (2): 93–109, 2010 97 L. smaug the temporal scales are tral. Four internasals. Nasal scale sur- smooth. Liolaemus smaug have lower rounded by eight scales, separated from number of scales around midbody than canthal scale by two scales. Four scales L. gununakuna and L. thermarum (73- between frontal and supercilliaries. Five 80 in L. smaug vs. 84-97). The number scales between frontal and rostral. of dorsal scales in L. smaug is lower Frontal divided in two. Two postros- than in L. gununakuna but higher than trals. Interparietal smaller than pari- in L. elongatus (62-68 in L. elongatus; etals, in contact with seven scales. Or- 69-83 in L. smaug; 83-90 in L. gu- bital semicircles complete. Five su- nunakuna). Liolaemus gununakuna has praoculars. Preocular separated from a lower number of ventral scales than lorilabial row by one scale.