Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870,

Cruz, Carlos Alberto Gonçalves, Caramaschi, Ulisses, Fusinatto, Luciana Ardenghi & Brasileiro, Cinthia Aguirre, 2019, Taxonomic review of Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870, with revalidation of D. imitator (Miranda-Ribeiro, 1920) and D. lauroi Miranda-Ribeiro, 1926, and description o, Zootaxa 4648 (1), pp. 27-62: 31-34

publication ID

https://doi.org/10.11646/zootaxa.4648.1.2

publication LSID

lsid:zoobank.org:pub:ECE2A8C4-9CAA-4580-B589-D693C2F3EEB6

persistent identifier

http://treatment.plazi.org/id/03FF87BC-FFA9-EA15-FF34-F8C1FBE7FA53

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scientific name

Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870
status

 

Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870 

( Figs. 1–2View FIGURE 1View FIGURE 2)

Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870  .

Dendrophryniscus brevipollicatus  brevipollicatus— Miranda-Ribeiro 1926.

Dendrophryniscus brevipollicatus lutzi Miranda-Ribeiro, 1926  .

Dendrophryniscus  b. travassoi P. Miranda-Ribeiro, 1955 — nomen nudum.

Dendrophryniscus brevipollicatus — Cochran 1955  (part); Izecksohn 1994 (part).

Neotype. MNRJ 91627View Materials, adult male, collected at Açude da Solidão (22º57’S, 43º17’W, Datum WGS 84; 410 m above sea level), Parque Nacional da Tijuca , Municipality of Rio de Janeiro, State of Rio de Janeiro, Brazil, by A. L. Peracchi and E. Izecksohn, on 11 February1961.GoogleMaps 

Jiménez de la Espada (1870) did not designate the type specimens for D. brevipollicatus  . Frost (2019) stated that the types were presumably in the Museo Nacional de Ciencias Naturales, Madrid, Spain ( MNCN). However, according to the curator of the herpetological collection at MNCN, there are not extant type specimens of D. brevipollicatus  . Based on the Article 75 of the International Code of Zoological Nomenclature ( ICZN 1999), we here designate a neotype for the species.

The original type locality of D. brevipollicatus  was quoted as Hab. in Brasil; prope Rio de Janeiro, in monte Corcovado ( Jiménez de la Espada 1870)  , and given as Corcovado  , Rio de Janeiro, Guanabara by Bokermann (1966). The current neotype designation sets the type locality for D. brevipollicatus  in the same general original region, in the Parque Nacional da Tijuca, Rio de Janeiro, RJ, Brazil.

Diagnosis. The species is characterized by: (1) medium size for the genus ( SVL 18.3–25.1 mm in males, 20.9– 27.7 mm in females); (2) body slender; (3) snout mucronate in dorsal view; (4) canthus rostralis slightly curved; (5) elliptical set of unpigmented pronounced granules posterior to the corner of mouth; (6) surfaces of upper eyelid with numerous granules and with a conspicuous margin; (7) tip of third and fourth fingers laterally expanded; (8) skinfold well developed on the articulation of the first and second phalanges of the fingers II, III, and IV; (9) male with moderate nuptial pad with minuscule dark horny asperities on finger I; (10) fingers slightly fringed, webbed only at base.

Comparisons with other species. Dendrophryniscus brevipollicatus  is distinguished from D. proboscideus  by the smaller size ( SVL 18.3–25.1 mm in males of D. brevipollicatus  ; SVL 39.2–46.4 mm in males of D. proboscideus  ); D. brevipollicatus  is distinguished from D. krausae  and D. stawiarskyi  by the slender body with uniform shape (robust and enlarged posteriorly in those species); D. brevipollicatus  is distinguished from D. berthalutzae  , D. carvalhoi  , D. krausae  , D. lauroi  , D. oreites  , D. proboscideus  , D. skuki  , and D. stawiarskyi  by the snout mucronate in dorsal view (snout rounded in D. berthalutzae  , D. carvalhoi  , D. lauroi  , and D. stawiarskyi  ; snout truncate in dorsal view in D. krausae  , D. oreites  , and D. proboscideus  ; snout long, narrow, spatulate, with parallel lateral borders and rounded tip in D. skuki  ); by the canthus rostralis slightly curved, D. brevipollicatus  is distinguished from D. davori  sp. nov., D. carvalhoi  , D. krausae  , D. lauroi  , and D. stawiarskyi  (canthus rostralis straight); D. brevipollicatus  presents an elliptical set of white granules posterior to the corner of mouth (longitudinal set in D. berthalutzae  , D. krausae  , D. leucomystax  , and D. oreites  ; two pronounced granules in D. imitator  ; absent in D. carvalhoi  , D. haddadi  sp. nov., D. organensis  , D. proboscideus  , D. skuki  , and D. stawiarskyi  ); D. brevipollicatus  presents the surfaces of upper eyelid with numerous granules densely distributed and with a conspicuous margin (few granules sparse and external margin prominent in D. haddadi  sp. nov. and D. imitator  ; few granules sparse and external margin con- spicuous in D. davori  sp. nov.; D. brevipollicatus  is distinguished from D. berthalutzae  , D. carvalhoi  , D. haddadi  sp. nov., D. imitator  , D. krausae  , D. oreites  , and D. stawiarskyi  by the tip of the third and fourth fingers laterally expanded (poorly or not expanded in those species); D. brevipollicatus  is distinguished from D. davori  sp. nov., D. berthalutzae  , D. carvalhoi  , D. haddadi  sp. nov., D. imitator  , D. krausae  , D. lauroi  , D. leucomystax  , D. oreites  , and D. stawiarskyi  by the presence of a skinfold well developed on the articulation of the first and second phalanges of the fingers II, III, and IV (poorly developed in those species); D. brevipollicatus  is distinguished from D. davori  sp. nov., D. carvalhoi  , D. izecksohni  sp. nov., D. leucomystax  , and D. stawiarskyi  by the presence of moderately developed nuptial pad in males (absent in D. leucomystax  ; very developed in D. davori  sp. nov., D. carvalhoi  , D. izecksohni  sp. nov., and D. stawiarskyi  ); D. brevipollicatus  is distinguished from D. berthalutzae  , D. carvalhoi  , D. haddadi  sp. nov., D. imitator  , D. lauroi  , D. oreites  , D. skuki  , and D. stawiarskyi  by the fingers slightly fringed and webbed only at base (fingers not fringed nor webbed in those species), from D. krausae  (fingers not fringed and webbed only at base), and from D. izecksohni  sp. nov. and D. jureia  sp. nov. (fingers fringed and webbed about one third).

D escription of neotype. Body slender, elongated ( Fig. 1View FIGURE 1); head triangular, longer than wide, head length 33.5% of SVL; snout mucronate in dorsal view, acute in lateral view ( Fig. 2View FIGURE 2), snout 49.7% of head length; nostrils not protuberant, small, elliptical, located laterally at the beginning of the distal third of the eye to snout distance, slightly below the canthus rostralis; internarial distance 65% of eye to snout distance; eye diameter 78% of eye to nostril distance, 81% of interorbital distance; eye slightly protuberant; canthus rostralis slightly curved; loreal region vertical; vocal sac indistinct; choanae small, circular, very far from each other; tongue long, narrow; vocal slits present. Arms robust, forearms more robust than upper arms; hand with fingers slender, slightly fringed and webbed only at base, distal end of the third and fourth fingers laterally expanded; finger I enlarged, covered by moderate nuptial pad with minuscule dark horny asperities; relative lengths of fingers I< II < IV < III; subarticular tubercles single, round; outer metacarpal tubercle large, rounded; inner metacarpal tubercle rounded, of the same size of subarticular tubercles; supernumerary tubercles present, small; skin fold developed on the articulation of the first and second phalanges of the fingers II, III, and IV. Thigh length slightly shorter than tibia length; sum of thigh and tibia lengths 80% of snout–vent length. Tarsal length 25% of the snout–vent length. Foot with toes slender, not fringed; interdigital webbing only at the base, webbing formula: I1–2 - II2 - –3 III2– 31 /2 IV3–2 V; distal end of toes globose, not expanded laterally, relative lengths of toes I< II < III <V< IV; subarticular tubercles single, rounded, larger than those of the fingers; outer metatarsal tubercle large, approximately rounded; inner metatarsal tubercle large, elliptical; supernumerary tubercles absent. Dorsal and lateral surfaces covered by spinulose granules densely distributed, with uniform different size; ventral surfaces rugose; presence of numerous granules on upper eyelid surface, with the external margin prominent; elliptical set of white granules posterior to the corner of mouth.

Color in preservative. Dorsum pale brown; the characteristic pattern of a transverse brown bar on interorbital region extending on the upper eyelids, an ‘X’ shaped brown blotch on the scapular region, an inverse ‘Y’ shaped brown blotch on the sacral region, and two small blotches on the urostyle is only discernible.

Measurements of neotype. SVL 20.6; HL 6.9; HW 5.3; IND 1.5; ESD 3.4; ED 1.8; IOD 2.2; THL 8.0; TL 8.5; TAL 5.2; FL 7.4.

Variation. Specimens are congruent with respect to the morphological characters. Variation of measurements and descriptive statistics of males and females are presented in Tables 2 and 3. Sexual dimorphism can be observed on SVL (longer in females), on arms (more robust in males), finger I (short and robust in males), and nuptial pad (on finger I of males). Nuptial pad can be pigmented or not.

Distribution. Dendrophryniscus brevipollicatus  is known from the following municipalities ( Fig. 17View FIGURE 17) in the State of Rio de Janeiro, Brazil: Cachoeiras de Macacu, Reserva Ecológica de Guapiaçu (22 o 23’S, 42º43’W Datum WGS 84), Engenheiro Paulo de Frontin (22 o 32’S, 43 o 40’W, Datum WGS 84; 400 m altitude), Magé (22 o 37’S, 43 o 03’W, Datum WGS 84; 100 m altitude), Nova Iguaçu (22 o 50’S, 43 o 37’W, Datum WGS 84; 45 m altitude), Rio de Janeiro, Parque Nacional da Tijuca (22 o 57’S, 43 o 16’W, Datum WGS 84; 500 m altitude), Silva Jardim (22 o 39’S, 42 o 24’W, Datum WGS 84, 35m altitude).

Natural history. This species is associated to forested areas below 500 m altitude, breeding in Bromeliaceae  and Asparagaceae  plants, where its larvae develop in the water deposited in leaves axillae (C.A.G. Cruz, personal observation).

Remarks. Izecksohn (1971) described the vertebral pattern of this species.

MNCN

Museo Nacional de Ciencias Naturales

Kingdom

Animalia

Phylum

Chordata

Class

Amphibia

Order

Anura

Family

Bufonidae

Genus

Dendrophryniscus

Loc

Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870

Cruz, Carlos Alberto Gonçalves, Caramaschi, Ulisses, Fusinatto, Luciana Ardenghi & Brasileiro, Cinthia Aguirre 2019
2019
Loc

Dendrophryniscus brevipollicatus — Cochran 1955

- Cochran 1955
1955
Loc

Dendrophryniscus brevipollicatus lutzi

Miranda-Ribeiro 1926
1926
Loc

Dendrophryniscus brevipollicatus Jiménez de la Espada, 1870

Jimenez de la Espada 1870
1870
Loc

Dendrophryniscus brevipollicatus

Jimenez de la Espada 1870
1870
Loc

Dendrophryniscus

Jimenez de la Espada 1870
1870