Redescrição de Ischnocnema holti (Amphibia: Anura: Brachycephalidae)

Abstract

Ischnocnema holti (Cochran, 1948) foi descrito com base em apenas um único indivíduo coletado no início do século XX no alto da Serra do Itatiaia. Neste trabalho é apresentada uma redescrição dessa espécie, baseada em 25 exemplares (18 machos e sete fêmeas), coletados na localidade-tipo. Medições dos exemplares, descrição da coloração em vida e aspectos de sua biologia e reprodução, observados em campo são incluídos. Ischnocnema holti é uma espécie de porte médio (comprimento rostro-anal: 13,5 a 31,7mm), vista dorsal e lateral arredondada e discos adesivos dos dedos bem desenvolvidos, e muita plasticidade em relação a sua morfologia e coloração. Encontra-se no grupo de I. lactea (Miranda-Ribeiro, 1923) e é aqui comparada com alguns de seus componentes.

Molecular phylogeny of Ischnocnema (Anura: Brachycephalidae) with the redefinition of its series and the description of two new species

“…Some species lack the pad, yet for others its presence is unknown. It can be large and conspicuous, as in the members of the I. parva, I. guentheri, and I. venancioi series, and also I. surda (member of the I. verrucosa series; Brusquetti et al, 2013;Taucce et al, 2018; this study); minute, as in I. randorum (Heyer, 1985); faint and translucent, as in I. karst, I. nigriventris, and I. vizottoi (Martins and Haddad, 2010;Berneck et al, 2013); and even reduced to some white granules as in I. holti (Targino and Carvalho-e-Silva, 2008). The nuptial pad is absent from the remaining species of the I. verrucosa series (Hedges et al, 2008), from I. melanopygia and I. spanios, of the I. lactea series (Heyer, 1985;Targino et al, 2009), from I. manezinho (Garcia, 1996), from I. nanahallux (Brusquetti et al, 2013), and from I. sambaqui (Castanho and Haddad, 2000).…”

“…Expanded tips of fingers II-IV and large truncated discs of fingers III and IV distinguish I. venancioi from members of the I. parva series, I. nanahallux (tips of fingers not expanded in these species; Hedges et al, 2008;Brusquetti et al, 2013), and members of the I. verrucosa series (disks small or moderately-sized in these species; Hedges et al, 2008;. The large, conspicuous, glandular-appearing nuptial pad differentiates I. venancioi from I. manezinho, I. sambaqui, I. nanahallux, and the members of the I. lactea series (minute nuptial pad in I. randorum; translucent in I. nigriventris and I. vizottoi; reduced to some white granules in I. holti; absent in I. manezinho, I. sambaqui, I. nanahallux, I. melanopygia and I. spanios; unknown in other species; Heyer, 1985;Hedges et al, 2008;Targino and Carvalho-e-Silva, 2008;Berneck et al, 2013) and I. verrucosa series (except for I. surda; faint, translucent nuptial pad in I. karst [Canedo, Targino, Leite, and Haddad, 2012]; absent in other species; Hedges et al, 2008;. The mask-like stripe starting at the tip of the snout or the nostril, contouring the canthus rostralis, passing through the eye, contouring the dorsal portion of the tympanum, and finishing near arm insertion distinguishes I. venancioi from I. manezinho, I. sambaqui, and the members of the I. guentheri, I. lactea, and I. verrucosa series (mask-like stripe usually absent in these species; when present it does not pass through the eye).…”

“…The large, conspicuous, glandular-appearing nuptial pad differentiates I. parnaso sp. nov. from I. manezinho, I. sambaqui, I. nanahallux, and the members of the I. lactea (minute nuptial pad in I. randorum; translucent in I. nigriventris and I. vizottoi; reduced to some white granules in I. holti; absent in I. melanopygia and I. spanios; unknown in other species ;Heyer, 1985;Hedges et al, 2008;Targino and Carvalho-e-Silva, 2008;Berneck et al, 2013) and I. verrucosa series (except for I. surda; faint, translucent nuptial pad in I. karst; absent in other species; Hedges et al, 2008;. The mask-like stripe starting at the tip of the snout or the nostril, contouring the canthus rostralis, passing through the eye, contouring the dorsal portion of the tympanum and reaching near arm insertion distinguishes I. parnaso sp.…”

Taxonomic status and redescription of Flectonotus ulei (Anura: Hemiphractidae), with a key for the species of Fritziana

“…The nomenclature for the shape of tubercles follows DUELLMAN (1970) and the nomenclature of the position of tubercles follows TARGINO & CARVALHO-E-SILVA (2008). The webbing formula follows SAVAGE & HEYER (1967) with subsequent modifications from MYERS & DUELLMAN (1982).…”

Rediscovery and re-description of Ischnocnema nigriventris (Lutz, 1925) (Anura: Terrarana: Brachycephalidae)

“…The specimens we collected share the following characters with them: series of warty tubercles on the upper eyelid and dorsum; presence of prominent calcar on the heels; and the expanded emarginated disks, with ungual flap notched in dorsal view. There are three species of the Ischnocnema lactea species series in Itatiaia, I. melanopygia, I. concolor, and I. holti (Targino & Carvalho-e-Silva, 2008;Targino et al 2009). The illustrated specimen (Fig.…”