Mantidactylus schulzi sp. nov. Figs. 3–4 Remarks. This species has previously been named Mantidactylus sp. aff. biporus "Tsaratanana Andampy" by Glaw & Vences (2007), Mantidactylus sp. aff. betsileanus by Andreone et al. (2009), Mantidactylus sp. 32 by Vieites et al. (2009) and Mantidactylus sp. Ca32 by Perl et al. (2014). The ICZN-LSID number for this nomenclatural act (description of a new species) is urn:lsid:zoobank.org:act:2739C501-C964-4FB2-9ADC- 0FE4CB85B05A. Holotype. ZSM 653/2001 (field number FGMV 2001.150), adult male, collected on the Tsaratanana Massif, Manarikoba Forest, Andampy, "Camp 0" (14°02’32’’S, 48°45’42’’E, ca. 730 m above sea level), former Antsiranana province, northern Madagascar on 10–11 February 2001 by F. Andreone, F. Mattioli, J. Randrianirina & M. Vences. Paratypes. ZMA 19374 (fgmv 2002.754, Adult female) and ZMA 19375 (FGMV 2002.762, Adult male), ZSM 821–822 /2003 (adult males) and ZSM 823–826 /2003 (adult females), all collected on 2 February 2003 at Manongarivo, Camp 0 (13°58’32’’S, 48°25’36’’E, 688 m above sea level), former Antsiranana province, northwestern Madagascar, by F. Glaw, R.D. Randrianiaina & M. Vences; ZSM 651–652/2001 and 654/2001, with same collection data as holotype. The field numbers of the zsm paratypes are provided in Table 1. Additional uncatalogued paratypes from the UADBA collection are FGMV 2002.749, FGMV 2002.756, FGMV 2002.758, FGMV 2002.760, FGMV 2002.761, FGMV 2002.763, FGMV 2002.764, and FGMV 2002.765, all with same collection data as ZMA 19374. These eight UADBA paratypes and the two ZMA paratypes were not available for morphological studies but had identical sequences as the holotype (Fig. 1). Diagnosis. The new species is assigned to the genus Mantidactylus based on the presence of an intercalary element between terminal and subterminal phalanges of fingers and toes (verified by external observation), and of a central depression in femoral glands, presence of a rudimentary femoral gland in the female, and tympanum diameter distinctly larger in males compared to females. Within Mantidactylus, it is assigned to the subgenus Brygoomantis by the combination of (1) rather small body size (male SVL 21–24 mm, female SVL 25–29 mm), (2) absence of dorsolateral colour border, (3) absence of a distinct frenal stripe, (4) absence of large yellowish patches or stripes in the inguinal region or between colouration of flanks and belly, (5) only partially webbed feet, (6) riparian habits, living close to the water in streams, and (7) molecular phylogenetic relationships (see Glaw & Vences 2006). In comparison with nine out of the 12 nominal species of Brygoomantis, according to data summarized from Glaw & Vences (2007) and Blommers-Schlösser & Blanc (1991), the new species is distinguished by its smaller body size (male SVL 21–24 mm): from M. bellyi (32–41 mm), M. bourgati (> 30 mm mm), M. biporus (26–27 mm), M. curtus (> 30 mm), M. ambohimitombi (> 40 mm), M. madecassus (27–30 mm), M. noralottae (33–35 mm), M. pauliani (25–32 mm), and M. ulcerosus (32–34 mm). Where advertisement calls are known, the new species also differs by advertisement calls: M. bellyi, M. biporus, and M. ulcerosus all emit pulsed notes with evenly spaced pulses (unevenly spaced in the new species) and as far as known with faster pulse rates, but detailed analyses and comparisons of their calls are still pending. Two further species of Brygoomantis also are slightly larger, but with overlap of values: M. betsileanus (male SVL 23–28 mm), M. alutus (24–26 mm); M. schulzi sp. nov. is distinguished from M. alutus by a more distinct throat pattern, with a white central stripe on dark throat (vs. mostly light-coloured throat with indistinct dark mottling), by a weakly expressed light spot on the snout tip (vs. absence), and different advertisement calls (irregular short series of pulsed notes with a typical rate of 62–84 pulses per second, vs. a regular series of 5–14 pulsed notes of 19–22 pulses repeated at a pulse rate of about 50 per second); from M. betsileanus as defined by Blommers-Schlösser (1979) and Glaw & Vences (1994, 2007) by a less distinct white spot on the snout tip and much larger and more distinct femoral glands in males. Finally, the new species is at first glance morphologically similar to M. tricinctus but strongly differs from this species by more extended webbing on the foot (almost absent in that species), and by a slightly larger body size (male SVL 21–24 mm, vs. 17–19 mm in M. tricinctus). The calls of unambiguously identified M. tricinctus (from near the type locality in south-eastern Madagascar) remain undescribed and a bioacoustic comparison to the new species is therefore not possible. Furthermore, the new species is distinguished from all nominal species of Brygoomantis (except M. ambohimitombi for which no genetic data are available) by strong genetic differences (pairwise 16S differences>6.7%). Description of the male holotype. ZSM 653/2001 (field number FGMV 2001.150), adult male in mediocre state of preservation (softly fixed, similar to all other available specimens, Fig. 3). For measurements, see Table 1. Body rather stout. Head wider than long, as wide as body. Snout rather pointed. Nostrils directed laterally, slightly protuberant, nearer to tip of snout than to eye. Canthus rostralis moderately distinct, loreal region slightly concave. Tympanum distinct, large, oval, horizontal diameter of tympanum 94% of horizontal eye diameter. Supratympanic fold distinct, beginning straight above, with rather distinct bend midway towards insertion of forelimb. Tongue ovoid, distinctly bifid posteriorly. Vomerine teeth form two rounded aggregations, positioned posterolateral to choanae. Choanae rounded. Subarticular tubercles single. Outer metacarpal tubercle poorly recognizable, inner metacarpal tubercle present. Fingers without webbing. Relative length of fingers: I

Published as part of Vences, Miguel, Hildenbrand, Andrea, Warmuth, Katharina M., Andreone, Franco & Glaw, Frank, 2018, A new riparian Mantidactylus (Brygoomantis) frog from the Tsaratanana and Manongarivo Massifs in northern Madagascar, pp. 575-588 in Zootaxa 4486 (4) on pages 579-581, DOI: 10.11646/zootaxa.4486.4.10, http://zenodo.org/record/1442208