Gephyromantis (Duboimantis) grosjeani, D. & Mihaja, 2018

D., Mark & Mihaja, Fanomezana, 2018, Two new Madagascan frog species of the Gephyromantis (Duboimantis) tandroka complex from northern Madagascar, Alytes 36 (1 - 4), pp. 130-158 : 146

Gephyromantis (Duboimantis) grosjeani sp. nov.

( fig. 1–3 , 5–9 , Table 1)

Figures

Figure 1. Maximum Likelihood tree based on 1106 bp of the mitochondrial 12S and 16S rRNA gene fragments, showing phylogenetic relationships of the two new species to their closest relatives among Gephyromantis. Support values at nodes are ML likelihood bootstrap values and BI posterior probabilities. Gephyromantis granulatus was used as outgroup (removed for better graphical representation). Inset photos show representative individuals of the target species, size of the pictures roughly to scale.

Figure 2. Comparative oscillograms of parts of call series of some representative of the G. tandroka complex in the subgenus Duboimantis. The figure shows the typical pattern of multi-note calls in Gephyromantis (Duboimantis) saturnini sp. nov. vs. G. (D.) tandroka and G. (D.) grosjeani sp. nov. The recording of G. tandroka from 2005 (taken from Vences et al. 2006) is of a chorus of multiple specimens; for visualization, the amplitude of calls of other specimens was strongly reduced to highlight the calls of the specimens closest to the microphone.

Figure 3. Comparative spectrograms and oscillograms of calls of some representatives of the G. tandroka complex in the subgenus Duboimantis.

Figure 5. Holotypes of Gephyromantis (Duboimantis) saturnini sp. nov. (ZSM 61/2016) and G. (D.) grosjeani sp. nov. (ZSM 1554/2012) in dorsal (left) and ventral (right) view.

Figure 6. Femoral glands of male specimens of Gephyromantis tandroka ZSM 321/2005 (FGZC 2812), femoral gland granules (FGG) 24 left/21 right (above), G. saturnini sp. nov. Holotype ZSM 61/2016 (MSZC 123), FGG 16/15 (middle) and G. grosjeani sp. nov. (unidentified UADBA specimen), FGG, 41/34 (below). Note the much more distinct glands in the latter species.

Figure 7. Heads of Gephyromantis (Duboimantis) saturnini sp. nov. and G. (D.) grosjeani sp. nov. in dorsal view compared to G. (D.) tandroka. Arrows indicate the interocular tubercles, which appear less expressed especially in G. (D.) saturnini sp. nov. than in G. (D.) tandroka.

Figure 8. A calling male specimen of Gephyromantis (Duboimantis) grosjeani sp. nov. (specimen unidentified). Note the clearly bilobed subgular vocal sacs.

Figure 9. Photos in life of four specimens of Gephyromantis (Duboimantis) grosjeani sp. nov. from Sorata. (a–f) unidentified males (UADBA-A specimens) with femoral gland granule (FGG) numbers of (b) 41 left/34 right, (d) 31/34 and (f) 25/27; (g–h) female ZSM 1552/2012 (FGZC 3693).