A review of Aulacospira Möllendorff, 1890 and Pseudostreptaxis Möllendorff, 1890 in the Philippines (Gastropoda, Pupilloidea, Hypselostomatidae)

Abstract

The genera Aulacospira and Pseudostreptaxis of the Philippines are revised based on the collections of the Senckenberg Forschungsinstitut und Naturmuseum (Frankfurt am Main, Germany), the Florida Museum of Natural History (USA), and recently collected material. Three new species are described: Aulacospiralens Páll-Gergely & Auffenberg, sp. n., Aulacospirakrobyloides Páll-Gergely & Schilthuizen, sp. n., Pseudostreptaxisharli Páll-Gergely & Schilthuizen, sp. n.

The terrestrial microsnail genus Aulacospira Möllendorff, 1890 (Eupulmonata, Stylommatophora, Hypselostomatidae) in Thailand with key to Thai species

“…nov. cannot be classified into either of these groups because both the apertural barrier and conspicuous groove are absent. The shell shape of A. panhai is distinctively different from other Thai species; its streptaxoid shell shape resembles the genus Pseudostreptaxis Mölendorff, 1890 and especially P. azpeitiae (Hidago, 1890) from the Philippines, which was described only by shell morphology (Möllendorff 1890;Páll-Gergely et al 2019). We place A. panhai in Aulacospira, but more data, including anatomical and molecular, are needed to clarify its taxonomic placement.…”

“…Remarks. Páll-Gergely et al (2019) suggested that Thai and Philippine Aulacospira may not be closely related due to their unusual distribution pattern and suggested that the similar shell shape of these snails may be due to convergence but more data are needed to support this hypothesis. However, we continue to use Aulacospira for Thai species following the description of this genus by Pilsbry (1916Pilsbry ( -1918.…”

“…Of the known Thailand species, only A. lampangensis is known from the north of the country and all other species are restricted to eastern Thailand (Panha and Burch 2005, Dumrongrojwattana and Panha 2006, Dumrongrojwattana, 2008 (Table 1). Most of previous taxonomic studies on Aulacospira were based only on shell morphology (Pilsbry 1916(Pilsbry -1918Panha et al 2004;Panha and Burch 2005;Dumrongrojwattana andPanha 2005, 2006;Dumrongrojwattana 2008;Vermeulen et al 2007;Páll-Gergely et al 2019), and there is no information on the radula and genital system. We provide an overview of the Thai Aulacospria and describe three new species from eastern and southern Thailand based on the shell morphology, radula, and genital system.…”

A new subspecies of microsnail from Masungi Georeserve, Rizal, Philippines

“…However, Bouchet et al (2017) considered the family as a synonym of Gastrocoptidae Pilsbry, 1918following Gittenberger (1973, while several studies recognized Vertiginidae (Thompson & Lee 1988;Panha 1997;Hwang 2014). Páll-Gergely et al (2019) recognized the Hypselostomatidae. It is widely distributed throughout southern China and the Malayan peninsula, extending towards the Philippines and the Ryukyu Islands (Thompson & Auffenberg 1984;Páll-Gergely et al 2015).…”