65 (3): 357 – 370 © Senckenberg Gesellschaft für Naturforschung, 2015. 7.12.2015 Two new Oreophryne species from the Fakfak Mountains, West Papua Province of Indonesia (Anura, Microhylidae) Rainer Günther Museum für Naturkunde, Invalidenstr. 43, 10115 Berlin, Germany, Email-address: rainer.guenther(at)mfn-berlin.de Accepted 19.x.2015. Published online at www.senckenberg.de / vertebrate-zoology on 13.xi.2015. Abstract On the basis of material collected in the year 2008 in the Fakfak Mountains, Bomberai Peninsula, West Papua Province of Indonesia, two new microhylid frogs in the genus Oreophryne are described. Both new species are small (males 23.9 – 24.1 mm snout-vent length and 16.2 – 17.8 mm SVL) and belong to those Oreophryne that have a ligamentous connection between the procoracoid and the scapula, and by rattling or chirping advertisement calls. The larger species is further characterized by a mostly uniform dark grey-brown or black dorsal colouration with numerous small white flecks and yellow blotches on the hind limbs. The smaller species is characterized by a very small body size, and by a chirping call, this of great similarity to the call of the allopatric Choerophryne arndtorum. Kurzfassung Auf der Basis von Material, das im Jahr 2008 in den Fakfak Bergen, Bomberai Halbinsel, West Papua Provinz von Indonesien, gesammelt wurde, werden zwei neue Arten der Microhylidengattung Oreophryne beschrieben. Beide neue Arten gehören zu den kleinwüchsigen Formen (Männchen haben 23,9 – 24,1 mm bzw. 16,2 – 17,8 mm Kopf-Rumpf-Länge) der Gattung, und beide haben eine ligamentöse Verbindung zwischen Procoracoid und Scapula. Im Gegensatz zu den vielen Arten mit piependen oder pfeifenden Paarungsrufen klingen ihre Rufe knatternd (größere Art) bzw. zirpend (kleinere Art). Die größere Art kann von allen übrigen Vertretern der Gattung durch die ein- förmig dunkel graubraune bis schwarze Oberseite, die mit unzähligen winzigen weißen Flecken und Punkten bedeckt ist, sowie die großen gelbe Flecken an den Hinterextremitäten, abgegrenzt werden. Von den wenigen Arten im gleichen Gößenrahmen und einer ligamentösen Verbindung zwischen Procoracoid und Scapula kann die kleinere Spezies durch ihre charakteristisch zirpenden Paarungsrufe, die denen von der auf Yapen Island heimischen Art Choerophryne arndtorum täuschend ähneln, unterschieden werden. Key words Anura, Microhylidae, new species, western New Guinea. Introduction Frogs of the Australasian microhylid genus Oreophryne ALLISON 2009; RICHARDS & ISKANDAR 2000; ZWEIFEL are found from the Philippines in the west to New Britain 2003; ZWEIFEL et al. 2003, 2005). In September 2008 Island (Papua New Guinea) in the east and reach their the author, together with Papuan colleagues, stud- greatest diversity on the island of New Guinea (FROST ied frogs in the Fakfak Mountains, on the Bomberai 2015) where numerous new species have been dis- Peninsula, in the West Papua Province of Indonesia, covered and described since the year 2000 (GÜNTHER island of New Guinea. Among those frogs are two spe- 2003a,b; GÜNTHER & RICHARDS 2011; GÜNTHER et al. cies of the genus Oreophryne that are here described as 2001, 2009, 2012, 2014; KRAUS 2011, 2013; KRAUS & new to science. ISSN 1864-5755 357 Günther, R.: Two new Oreophryne species from West Papua Province of Indonesia Material and methods Frogs were collected at night after they were located by their advertisement calls. All specimens were photo- graphed in life the next day, anaesthetised with chloro- butanol, and subsequently fixed in 2 % formalin. Tissue probes from thigh muscle were taken from some speci- mens and probes stored in 96 % ethanol to enable later DNA sequencing, before the animal was fixed in forma- lin. All specimens were later transferred to 75 % ethanol in the Berlin museum. One specimen of each species was cleared and stained as an osteological preparation ac- cording to a method modified from DINGERKUS & UHLER (1977). The following measurements were taken with a digi- tal calliper (> 10 mm) or with a binocular dissecting mi- Fig. 1. Map of western New Guinea Island indicating West Papua croscope fitted with an ocular micrometer (< 10 mm) to Province and Papua Province of Indonesia and approximate collec- the nearest 0.1 mm from preserved specimens only: tion site (closed circle 1) of both new species. SUL snout-urostyle length from tip of snout to distal tip of urostyle bone; SUL is about one to two mm Material compared shorter than the snout-vent length (SVL). As the measurement error is higher in the latter, I pre- Oreophryne albomaculata South Australian Museum Adelaide fer to use the former. In general, both measure- (SAMA) and Museum für Naturkunde, Berlin (ZMB), type series; ments are more or less identical and are used in- O. albopunctata, Zoologisch Museum Amsterdam (ZMA) 5821, 5822, syntypes; O. anthonyi, The Natural History Museum, London terchangeably in this paper; (BMNH) 1947.2.12.34 – 40, syntypes; O. asplenicola, ZMB, type TL tibia length: external distance between knee and series; O. atrigularis, ZMB type series; O. biroi (Mehelyia affinis), ankle; Naturhistorisches Museum Wien (NHMW) 19826, fide ZWEIFEL TaL length of tarsus: external distance, tarsal and an- et al. (2003); O. brevicrus, American Museum of Natural History, New York (AMNH) 43694, 43697, 43700 – 02, paratypes; O. brevi­ kle joints held at right angles; rostris, ZMB, type series; O. clamata, ZMB, type series; O. cruci­ T4L length of 4th toe: from tip of toe to proximal end fer, ZMA 5819, syntype; O. curator, SAMA and ZMB, type series; of inner metatarsal tubercle; O. flava, ZMA 5823, holotype, AMNH 58152 – 53, 58155 – 57; T4D transverse diameter of disc of 4th toe; O. frontifasciata, National Museum of Natural History, Naturalis, T1D transverse diameter of disc of first toe; Leiden (RMNH) 1807, lectotype; O. furu Museum Zoologicum Bogoriense, Cibinong (MZB Amp.), SAMA and ZMB, type se- F3L length of 3rd finger; ries; O. geislerorum, Forschungsinstitut und Naturmuseum Sen- F3D transverse diameter of disc of 3rd finger; cken berg, Frankfurt/Main (SMF) 4197, holotype; NHMW 19825: F1D transverse diameter of disc of first finger; 1 – 4, fide ZWEIFEL et al. (2003); O. graminis, University of Papua HL head length, from tip of snout to posterior margin New Guinea, Port Moresby (UPNG), SAMA and ZMB, type se- ries; O. habbemensis, ZMB, type series; O. idenburgensis, RMNH of tympanum; 10473 and AMNH A49665 – 6, A49668, paratypes; O. inornata, HW head width, taken in the region of the tympana; AMNH 56731, 56903 – 04, 56984, 57259, paratypes; O. insulana, SL snout length, from an imaginary line connecting AMNH 56732, 57265, 57266, paratypes; O. kampeni, BMNH the centres of the eyes to tip of the snout; 1947.2.1214, holotype; O. kapisa, ZMB, type series; O. loriae, END distance from anterior corner of orbital opening to BMNH 1947.2.12.41 – 42, syntypes; O. moluccensis, SMF 4203, lectotype; O. notata (AMNH A – 81196 – 97 and A – 81199) parato- centre of naris; potypes; O. oviprotector, SAMA and ZMB, type series; O. parke­ IND internarial distance between centres of nares; ri, Museum of Comparative Zoology, Cambridge (MCZ) 12964, ED eye diameter, from anterior to posterior corner of holotype; O. pseudasplenicola, ZMB, type series; O. sibilans, ZMB, orbital opening; type series; O. streiffeleri, SAMA, UPNG and ZMB, type series; O. unicolor, ZMB, type series; O. wapoga, ZMB, type series; TyD horizontal diameter of tympanum. O. wolterstorffi, ZMB 16853, holotype. Moreover, I referred to most of the original species descriptions and recompiled treatises Advertisement calls were recorded under natural condi- to make my comparisons. tions with a Sony Digital Audio Tape (DAT) Walkman TCD-D 100 and a Sennheiser microphone MKE 300 and analysed with Avisoft-SAS Lab Pro software. All speci- mens are currently housed in the Museum für Naturkunde Oreophryne roedeli sp. nov. Berlin (ZMB) and bear registration numbers of this insti- tution. Part of the type series will be transferred to the Holotype. ZMB 83016 (Field number: FN 7917), adult male, Museum Zoologicum Bogoriense (MZB), Cibinong, West about 6 km direct line N of Fakfak Town, near the road Fakfak Java, Indonesia, after completion of my studies. Town – Kokas Village, Bomberai Peninsula, West Papua Province, 358 VERTEBRATE ZOOLOGY — 65 (3) 2015 Indonesia, 2°52′37.56′′ S and 132°18′15.03′′ E (Fig.1), elevation Table 1. Body measurements and body ratios of the type series of 500 m above sea level (a.s.l)., collected by R. GÜNTHER and A. PIA­ Oreophryne roedeli sp. nov. ZMB 83016 is the holotype, all types HAR on 11 September 2008. are adult males, all measurements in mm. Inv.-No. = registration Paratypes. ZMB 83017 (FN 7918) and ZMB 83018 (FN 7919), number; explanation of measurements in “Material and methods”. both adult males, collection data the same as for the holotype. ZMB 83017 is now an osteological preparation. Inv.-No. ZMB 83016 ZMB 83017 ZMB 83018 Mean SUL 23.9 24.0 24.1 24.0 Diagnosis. A small species of the genus Oreophryne TL 10.8 11.3 10.4 with a snout – urostyle length in males (n = 3) from 23.9 – TaL 6.9 7.1 6.7 24.1 mm. Connection between procoracoid and scap- L4T 10.9 11.0 10.3 ula ligamentous. No webs between fingers, but ba- T4D 1.7 1.5 1.5 sal webs between toes; fifth toe somewhat longer than L3F 7.3 7.8 6.9 third; finger discs wider than toe discs (ratio T4D/F3D F3D 1.9 1.8 1.9 0.79 – 0.89); tibiae of middle size (TL/SUL 0.43 – 0.47). F1D 1.3 1.2 1.2 Eyes middle-sized (ED/SUL 0.112 – 0.117), eye-naris T1D 1.0 1.0 1.0 distance greater than internarial distance (END/IND HL 6.3 6.0 6.0 1.17 – 1.29).