Haddadus aramunha (Cassimiro, Verdade & Rodrigues, 2008) Cassimiro, Verdade & Rodrigues, 2008

Amaro, Renata C., Nunes, Ivan, Canedo, Clarissa, Napoli, Marcelo F., Juncá, Flora A., Verdade, Vanessa K., Haddad, Célio F. B. & Rodrigues, Miguel T., 2013, A molecular phylogeny recovers Strabomantis aramunha Cassimiro, Verdade and Rodrigues, 2008 and Haddadus binotatus (Spix, 1824) (Anura: Terrarana) as sister taxa, Zootaxa 3741 (4), pp. 569-582 : 575-576

Haddadus aramunha (Cassimiro, Verdade & Rodrigues, 2008) , new comb.

Diagnosis. To date, there is no identifiable morphological synapomorphy supporting the monophyly of the genus Haddadus (see discussion). We assign H. aramunha to this genus based on inferred relationships using molecular data, as well as on the overall similarity among males of S. aramunha and H. binotatus . Also, head width (HW)/ snout-vent length (SVL) lower than 49% is a characteristic distinguishing members of Haddadus from Strabomantis (Cassimiro et al. 2008) (up to 54% in Strabomantis, Hedges et al. 2008 ).

Haddadus aramunha is characterized by the following combination of traits: (1) largest size for the genus (adult males SVL 37.3–44.9 mm, adult females SVL 51.0– 81.9 mm; Napoli et al. 2010); (2) wide head (HW/SVL 0.40–0.49; HL/SVL 0.37–0.45), its width greater to slightly smaller than its length; (3) adult females bearing welldeveloped frontoparietal crests, delimiting a mid-dorsal longitudinal groove; (4) posterior part of pars fascialis of maxilla deepened; (5) mandibular ramus of the trigeminal nerve passing lateral to the m. levator mandibulae posterior subexternus, (6) finger I much longer (FLI/SVL 0.15–0.23) than finger II (FLII/SVL 0.08–012); (7) fifth toe smaller than third; (8) dorsum generally smooth, covered with keratin white dots, bearing only one or two granular dorsolateral ridges; (9) vocal sac and vocal slits absent in males; (10) no asperities on thumbs of males; (11) in adult live specimens, dorsal background dark reddish brown.

The new combination herein proposed changes Hedges’ et al. (2008) generic diagnosis of Haddadus : (1) head narrower (or broader than body); (3) cranial crests absent (or present and well developed in females); (8) Toe III equal in length, slightly shorter (or clearly longer than Toe V); and (11) range in SVL 17 mm in only known specimen of H. plicifer (82 mm in females of H. aramunha ).

Comparisons with other species. Haddadus aramunha differs from H. binotatus by always presenting the head wider than long in females, and usually wider than long in males (always longer than wide in H. binotatus ); shorter legs (slightly longer than SVL in H. aramunha (thigh + tibia + foot length about 1.05 SVL), and clearly longer than SVL in H. binotatus (thigh + tibia + foot length about 1.15 SVL); conspicuous frontoparietal crests in females, and poorly developed ones in males, delimiting a mid-dorsal longitudinal groove (absent in H. binotatus ); Haddadus aramunha also differs from H. binotatus and H. plicifer (species data from Boulenger 1888) by the presence of only one or two granular dorsolateral ridges on dorsum (five symmetrical undulous linear folds on each side of the back in H. binotatus and H. plicifer ). The dark reddish brown dorsal background in live adult females of H. aramunha differs this species from H. binotatus , which never presents such a pattern (See Fig. 1 of Napoli et al. 2010). Haddadus aramunha inhabits open areas, living near streams within “campo rupestre” environments, while H. binotatus and H. plicifer are restricted to forested areas of the tropical Atlantic forest.

Figures

FIGURE 1. Bayesian inference (BI) topology of combined molecular dataset (cyt b, 16 S, 12 S, RAG – 1, and rhodopsin genes) showing the relationships of Haddadus aramunha within Terrarana. Numbers above nodes are posterior probability values (ns <95 %), maximum likelihood (ML) bootstrap support (ns <70 %), and maximum parsimony (MP) bootstrap support (ns <70 %), displayed as (BI / ML / MP); ns = no high support; * = 100 %; nc = no such clade by this criterion.