A new species of bent-toed gecko, genus Cyrtodactylus Gray, 1827 (Reptilia: Squamata: Gekkonidae), from Jawa Timur Province, Java, Indonesia, with taxonomic remarks on C. fumosus (Müller, 1895)

Abstract

A new species of the gekkonid lizard genus Cyrtodactylus Gray, 1827 is described from Klakah, Lumajang Regency, Jawa Timur Province, Java, Indonesia. Cyrtodactylus klakahensis sp. nov. can be distinguished from all other congeners by the presence of (1) a deep precloacal groove in males, (2) three rows of enlarged precloacofemoral scales, of which the third row bears 37-38 pores in males, (3) three or four rows of enlarged scales between the precloacofemoral scale rows and the cloaca, forming distinct chevrons, (4) raised and strongly keeled dorsal tubercles in 15-19 rows at midbody, (5) an indistinct lateral fold, (6) 17-20 subdigital lamellae under the 4^th toe, and (7) subcaudal scales which are not transversely enlarged. Cyrtodactylus klakahensis sp. nov. is only the third bent-toed gecko species described from Java, indicating that the diversity of this genus on this island has been neglected in the past. Furthermore, we confirm that C. fumosus (Müller, 1895) is a species that possesses a precloacal groove in males and is most likely restricted to northern Sulawesi. That species is defined by a single female holotype (NMB-REPT 2662). Specimens in museum collections catalogued as C. fumosus from localities elsewhere are misidentified and likely represent undescribed species.

Historical considerations and comments on the type series of Cyrtodactylus marmoratus Gray, 1831, with an updated comparative table for the bent-toed geckos of the Sunda Islands and Sulawesi

“…), we noticed some inaccuracies in our previously published comparative table (Hartmann et al 2016: Table 3), pertaining largely to the presence/absence of a precloacal depression in males vs. females. We herein correct these inaccuracies and take the opportunity to complement the earlier table by including the recently described Cyrtodactylus hitchi Riyanto, Kurniati &Engilis, 2016 andC.…”

“…Of pores, grooves, sulci, pits, hollows, and depressions Whereas Kluge (1985) counted 53 pores for the lectotype of Cyrtodactylus marmoratus (RMNH.RENA 2710a.1), we (Hartmann et al 2016) reported 52. We re-examined the specimen and here correct the count to 56 pores, some barely visible.…”

“…While ontogenetic variation or even variation in adult male specimens of this species appears to be possible, it is likely that Brongersma (1953) combined data from different Javanese taxa masquerading under the name C. marmoratus. Recent descriptions of new bent-toed geckos from Java (Riyanto et al 2014Hartmann et al 2016) indicate that the diversity of this group of geckos in Java is largely underestimated.…”

“…, as part of their recent description of Cyrtodactylus klakahensis Hartmann, Mecke, Kieckbusch, Mader & Kaiser, 2016, provided some further insights into the taxonomy of C. marmoratus Gray, 1831 and C. fumosus (Müller, 1895), two species hitherto considered to have fairly wide distributions in the Indonesian archipelago. Since this publication, we have uncovered additional information regarding the type series of C. marmoratus and some other species from the Sunda Islands and Sulawesi, which will be critical to the impending descriptions of additional species in the region (Awal Riyanto, in litt.…”

Hiding in plain sight on Gunung Muria: A new species and first record of rock gecko (Cnemaspis Strauch, 1887; Squamata, Gekkonidae) from Java, Indonesia

“…km, and Belitung Island (the type locality of C. purnamai) by ~470 km. The African-Asian Frog genus Chiromantis also occurs in Java (Riyanto & Kurniati 2014;Wostl et al 2017), as do other recently described reptiles and amphibians (Riyanto et al 2014;Hartmann et al 2016;Kieckbusch et al 2016;Wostl et al 2017;Hamidy et al 2018). These novelties have shown Java to be a more herpetologically interesting place than heretofore believed, even though it was believed to have been relatively well studied during the long history of exploration during the Dutch colonial period.…”