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A Comparison of Tadpoles of Two Populations of Leptodactylus Plaumanni (Anura: Leptodactylidae), with a Discussion of Leptodactylus Tadpole Morphology

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A Comparison of Tadpoles of Two Populations of Leptodactylus Plaumanni (Anura: Leptodactylidae), with a Discussion of Leptodactylus Tadpole Morphology Studies on Neotropical Fauna and Environment ISSN: 0165-0521 (Print) 1744-5140 (Online) Journal homepage: https://www.tandfonline.com/loi/nnfe20 A comparison of tadpoles of two populations of Leptodactylus plaumanni (Anura: Leptodactylidae), with a discussion of Leptodactylus tadpole morphology Caio Marinho Mello, Darlene da Silva Gonçalves, Mirco Solé, Denise de Cerqueira Rossa-Feres & Carlos Eduardo Conte To cite this article: Caio Marinho Mello, Darlene da Silva Gonçalves, Mirco Solé, Denise de Cerqueira Rossa-Feres & Carlos Eduardo Conte (2018) A comparison of tadpoles of two populations of Leptodactylusplaumanni (Anura: Leptodactylidae), with a discussion of Leptodactylus tadpole morphology, Studies on Neotropical Fauna and Environment, 53:3, 233-244, DOI: 10.1080/01650521.2018.1492661 To link to this article: https://doi.org/10.1080/01650521.2018.1492661 View supplementary material Published online: 16 Jul 2018. Submit your article to this journal Article views: 55 View Crossmark data Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=nnfe20 STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT 2018, VOL. 53, NO. 3, 233–244 https://doi.org/10.1080/01650521.2018.1492661 ORIGINAL ARTICLE A comparison of tadpoles of two populations of Leptodactylus plaumanni (Anura: Leptodactylidae), with a discussion of Leptodactylus tadpole morphology Caio Marinho Melloa,b, Darlene da Silva Gonçalvesa, Mirco Soléc,d, Denise de Cerqueira Rossa-Ferese and Carlos Eduardo Conte f,g aPrograma de Pós-Graduação em Zoologia, Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, PR, Brazil; bGrupo de Pesquisa Bioacústica, Ecologia e Comportamento Animal – BECA, Instituto Federal do Paraná, Pinhais, PR, Brazil; cDepartamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil; dHerpetology Section, Zoologisches Forschungsmuseum Alexander Koenig, Bonn, Germany; eLaboratório de Ecologia Teórica, Departamento de Zoologia e Botânica, Universidade Estadual Paulista - UNESP, São José do Rio Preto, SP, Brazil; fInstituto Neotropical: Pesquisa e Conservação, Curitiba, PR, Brazil; gCriadouro Onça Pintada, Campinha Grande do Sul, PR, Brazil ABSTRACT ARTICLE HISTORY Of the currently known 75 species within the four recognized species groups of Leptodactylus,the Received 24 August 2017 L. fuscus group contains 30 species, of which tadpoles are known for 24, including L. plaumanni Accepted 20 June 2018 described based on a population from Argentina. Herein, we describe external and internal oral KEYWORDS L. plaumanni morphology of tadpoles collected in Brazil and compare with tadpoles from Argentina. Larval morphology; In addition, we compare phenetic groups obtained from analysis of larval characters with the currently taxonomic groups; internal recognized species groups. The tadpole of L. plaumanni from Brazil is identified by: body globular in oral morphology; lateral view, ventral fin forming a wide arc, oral disc lateroventrally emarginate, marginal papillae of Leptodactylus fuscus group oral disc biseriate, more than 10 papillae on each side delimiting the mouth floor, and buccal roof arena trapezoidal. Of the 23 analyzed external morphological characters, only eight were shared by tadpoles from Argentina and Brazil, and they also shared 14 of the 15 internal oral morphological characters. Tadpoles of both populations differ in external morphology and, although such intraspe- cific differences can be due to plasticity, the hypothesis that these two populations represent different species cannot be dismissed. Phenetic groups obtained using larval characters are consistent with species groups proposed for Leptodactylus by phylogenetic analysis, based on adult characters. Introduction The Leptodactylus fuscus species group (de Sá et al. The genus Leptodactylus Fitzinger, 1826 consists of 75 2014) consists of 30 species that range in size from small species distributed from North to South America and (SVL = 30.9 mm) to large (SVL = 105.1 mm) and are West Indies (de Sá et al. 2014). The included species distinguished from species of the other species groups by were originally clustered into four phenetic groups lacking interdigital membranes and having nostrils that based on morphological and behavioral characters of are adjacent to or in contact with each other along their adults: L. latrans, L. melanonotus, L. pentadactylus, and median edges. The combined species distribution extends L. fuscus species groups (Heyer 1969a, 1970a, 1978, from the US state of Texas to Argentina, on both sides of 1979; Maxson & Heyer 1988). An integrative systema- the Andes, and on some islands of the Antilles, with a tic approach based on molecular (mitochondrial and large number of species concentrated in the southern and nuclear markers), morphological, and behavioral char- eastern regions of the Amazon Basin (Heyer 1978). acters of adults, corroborated the monophyly of the Leptodactylus plaumanni is distributed in southern genus and the phenetic groups proposed (de Sá et al. South America from Misiones, Argentina, to the states 2014). More than 80% of the species of Leptodactylus of Rio Grande do Sul, Santa Catarina and Paraná, in were included in their analysis, and their results Brazil (de Sá et al. 2014). The tadpole of this species was required the reallocation of just a few species in order described based on specimens from Misiones, Argentina to render the four species groups as monophyletic. (Grosso 2015). Comparing the description of the species CONTACT Caio Marinho Mello [email protected] Supplemental data for this article can be accessed here. © 2018 Informa UK Limited, trading as Taylor & Francis Group Published online 16 Jul 2018 234 C. M. MELLO ET AL. with tadpoles from Brazilian populations, we noticed municipality of General Carneiro (26°24′S, 51°22′W), extensive discrepancies, such as shape of body in lateral State of Paraná, and in the municipalities of Ponte view, total body length, body height, snout shape, dorsal Serrada, Passos Maia and Vargem Bonita, State of and ventral fin shape and marginal papillae. Herein, we Santa Catarina at the boundaries of Parque Nacional describe the external and internal oral morphology of L. das Araucárias (26°47′S, 51°56′W). The two locations plaumanni tadpoles collected in Brazil and compare them are 51 and 137 km, respectively, from Nova Teutônia, to the tadpoles described from Argentina (Grosso 2015). the type locality of L. plaumanni (Ahl 1936). Despite the extensive number of characters employed in Tadpoles were found in Araucaria forest associated the phylogenetic analysis of de Sá et al. (2014), larval with natural grasslands (‘campos naturais’, sensu morphology was not included. Considering that different Maack 2002), in four temporary water bodies: one life cycle phases can be under the influence of different located at the forest edge, two in an area of natural processes, we thought it of interest to also evaluate the grassland, and one in a pasture. During two years of usefulness of larval morphology for understanding rela- monthly samplings, adults and tadpoles of only two tionships among the species of the genus Leptodactylus. species of Leptodactylus were recorded in all areas sampled: L. latrans and L. plaumanni (Conte 2010; Conte pers. com. for the municipality of Vargem Material and methods Bonita). Tadpoles belonging to L. plaumanni were identified using a taxonomic key (Gonçalves 2014). Sampling, habitat and identification of For species confirmation, we raised individual tadpoles L. plaumanni tadpoles from Brazil until they were frogs and could be identified by the Brazilian tadpoles of L. plaumanni were collected following characteristics, which are in agreement with between January 2007 and January 2008, in the those of L. plaumanni (de Sá et al. 2014)(Figure 1): Figure 1. Juvenile specimen of Leptodactylus plaumanni from Brazil in (A) lateral view (B) dorsal view and (C) ventral view, and (D) hind limb and (E) forelimb. STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT 235 male snout calloused, not spatulate; males lacking Table 1. Morphometric proportions of Leptodactylus plaumanni thumb and chest spines; light upper lip stripe distinct; tadpoles from Brazil, with classification of ratios. Position of the pair of dorsal folds distinct; pair of dorsolateral folds nostrils and the spiracle were determined relative to the long- itudinal axis. BH: body height; BL: body length; BW: body width; distinct; pair of lateral folds distinct; posterior of thigh DFH: maximum dorsal fin height; ED: eye diameter; SED: snout- with light stripe; upper shank with narrow longitudinal eye distance; SH: spiracle height; SL: spiracle length; SND: snout- light stripes; belly uniformly light in color; and toes nostril distance; SOW: spiracle open width; SW: spiracle width; without lateral fringes. Tadpoles and juvenile frogs are TMH: maximum tail muscle height; TMW: maximum tail muscle deposited in the Coleção Científica de Anfíbios of the width; VFH: maximum ventral fin height. Departamento de Zoologia e Botânica of UNESP de Measure Formula Ratios Classification Nostrils size ED/BL > 0.03 Large São José do Rio Preto (DZSJRP Amphibia-Tadpoles: < 0.03 Small 1561.2, 1709.3, 1733.1 and 1713.1). One tadpole of L. - Absent Nostrils position SND/ < 0.4 Next to end of plaumanni from the Argentinian locality was provided SED nose/mouth by Dr. Diego Baldo, Laboratory of Evolutionary > 0.5 Next to eyes Genetics, Universidad
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