- GBIF Backbone Taxonomy
- Published in
- Coloma, Luis A., Duellman, William E., C, Ana Almendáriz, Ron, Santiago R., Terán-Valdez, Andrea, Guayasamin, Juan M. (2010): Five new (extinct?) species of Atelopus (Anura: Bufonidae) from Andean Colombia, Ecuador, and Peru. Zootaxa 2574: 1-54, DOI: 10.5281/zenodo.197448
- Atelopus orcesi
Diagnosis. (1) A medium-sized species with SVL in adult male 29.4 mm and in adult female 42.1 mm; (2) hind limbs short, tibia length / SVL 0.354 – 0.415; (3) phalangeal formula of hand 2 - 2 - 3 - 3 (inferred), basal webbing absent; (4) foot webbing formula I (0 - 0 +) — (½ - 1) II (0 +) — (1 -) III (½ - 1 -) — (½) IV (½) — (0 — ½) V; (5) snout acuminate, protruding beyond lower jaw; (6) tympanic membrane absent; (7) dorsal surfaces of body smooth, and warty on limbs; (8) row of yellow creamy warts on dorsolateral body of male, flanks with few, scattered, minute spiculae on female; (9) vertebral neural processes inconspicuous; (10) dorsum light to dark brown (in preservative), bearing a rudimentary X-shaped mark anteriorly and scattered small marks posteriorly; (11) minute gray stippling absent on dorsum of body, but minute white stippling present; (12) venter cream (in preservative) with a brown mark on gular-chest region; (13) gular region without warts, spiculae or coni. Atelopus orcesi sp. nov. is distinct from most species of Atelopus by the combination of two features, i. e., bearing an X-shaped mark on anterior dorsum and by male having a conspicuous dorsolateral row of warts on the body. Only A. laetissimus Ruiz-Carranza, Ardila-Robayo, and Hernández-Camacho, A. mucubajiensis Rivero, A. nahumae Ruiz-Carranza, Ardila-Robayo, and Hernández-Camacho, A. pinangoi Rivero, and A. sanjosei Rivero and Serna, share these two features. Atelopus cruciger Lichtenstein and Martens and A. walkeri Rivero also have these features, but females of these species have a conspicuous dorsolateral row of warts on the body (absent in female A. orcesi). Atelopus orcesi is mostly similar to two specimens (Atelopus sp. 16; Rueda-Almonacid 2005 a) from Departamentos del Chocó and Valle from western Colombia. Although they are geographically separated and on opposite sides of the Andes, and they also differ by female of A. orcesi having a brown band on flank, the possibility that they are conspecific remains to be further investigated with a larger sample size. The morphological character that differentiates them might be polymorphic. Atelopus orcesi also is similar to A. nepiozomus Peters from Provincia Morona-Santiago in southeastern Ecuador. Both have a similar ventral color pattern. Atelopus orcesi is larger (female holotype SVL: A. orcesi = 42.1 vs A. nepiozomus = 32.4) and lacks warts on dorsum (many low, rounded warts and pustules, which may be spiculate in A. nepiozomus). Atelopus orcesi differs from Atelopus laetissimus, A. mucubajiensis, A. nahumae, and A. pinangoi by the contrasting color of the row of warts (not contrasting color in A. laetissimus, A. mucubajiensis, A. nahumae, and A. pinangoi), and by the female having a pale brown band on the flank (band on flank absent in A. laetissimus, A. mucubajiensis, and A. pinangoi). Furthermore, A. orcesi is geographically distant and geographically isolated from A. laetissimus and A. nahumae in the Sierra Nevada de Santa Marta in Colombia, and from A. mucubajiensis and A. pinangoi in the Sierra de Santo Domingo in the Cordillera de Mérida of the Venezuelan Andes. Atelopus orcesi differs from the smaller A. sanjosei (female SVL A. orcesi = 42.1 vs females SVL A. sanjosei = 31.5 – 32.7 mm, n = 2) (from the eastern versant of Cordillera Central in Departamento Antioquia, Colombia) by female of A. orcesi lacking the dorsolateral row of warts (present in female A. sanjosei) and by having a brown mark on gular-chest region (absent in A. sanjosei).
Etymology. The specific name is a noun in the genitive case and it is a patronym for Gustavo Edmundo Orcés Villagómez (1903 – 1999), a pioneer of Ecuadorian vertebrate zoological research (Albuja V. 2004; Adler 2007). We recognize his contributions as a mentor and professor of a generation of zoologists in Ecuador, among them, two of us (LAC and AA). The specific name also is in recognition to the Fundación Herpetológica Gustavo Orcés that through the Vivarium, initially leaded by Jean-Marc Touzet and Ana María Velasco (the latter a collector of this species), pioneered herpetological public exhibits in Ecuador since the 1980 s.
Holotype. MHNG 2684.75, adult gravid female, from La Alegría-Sibundoy (0 ˚ 34 ’ N, 77 ˚ 31 ’ W; 2400 m), Provincia de Sucumbíos, Ecuador, collected in May 1988, by Ana María Velasco. Paratype. MHNG 2559.67, adult male with same data as holotype.
- Atelopus orcesi
- Common names
- Arlequín de Orcés in Spanish
- Orcés harlequin in English