![]() ![]() ![]() Some lectotype designations by Nantarat et al. In this article, we review the type status of all cyclophorid taxa originally described by Godwin-Austen (1915). Consequently, the interpretation of Godwin-Austen’s type series boundaries and the designation of the name-bearing type(s) is often contentious ( Nantarat et al. In contrast, the type lot numbers were explicitly designated in the original descriptions of some taxa in other monographs by Godwin-Austen (1910, 1914a, 1920). This way of type designation was not applied in the other works of Godwin-Austen in the same series ( Godwin-Austen 1914b, 1916, 1917, 1918a, b). 1313 MELVILLE COURT MEANING REGISTRATIONOf the type specimens housed in the NHM, the cyclophorid taxa originally described in the “Zoological Results of the Abor Expedition” by Godwin-Austen (1915) require special consideration as the original descriptions contain the explicit designation of “Type” and specimen lot numbers (which correspond to the NHMUK registration numbers note: NHM is the institutional acronym, whilst NHMUK is the registration number prefix of samples kept at the NHM). ![]() 1313 MELVILLE COURT MEANING CODEThese type specimens have already been catalogued and illustrated, and in certain cases lectotypes were designated in accordance with the International Code of Zoological Nomenclature ( ICZN 1999) to stabilize the usage of each nominal name ( Nantarat et al. 2019), and constitute about half of all currently known nominal species of these genera ( Kobelt 1902). The type specimens of 95 nominal species in six other cyclophorid genera, namely Crossopoma Martens, 1891, Cyclotus Swainson, 1840, Myxostoma Troschel, 1847, Pterocyclos, Scabrina Blanford, 1863, Spiraculum, and Rhiostoma are also housed in the NHM ( Sutcharit et al. 2014a), which is approximately a quarter of all currently recognized species ( Kobelt 1902, 1908). The Natural History Museum in London (hereafter the NHM) holds the type specimens of 42 nominal Cyclophorus species ( Nantarat et al. 2018), and for which precise species identification is not possible without direct comparison with the type specimens. Southeast Asia, including Thailand, also hosts a high diversity of related cyclophorid genera, such as Pterocyclos Benson, 1832, Spiraculum Pearson, 1833 (= Pearsonia Kobelt, 1902), and Rhiostoma Benson, 1860, in which the members of each genus are conchologically very similar ( BEDO 2017 Sutcharit et al. The phylogenetic analyses of the operculated land snail genus Cyclophorus ( Caenogastropoda: Cyclophoridae) from Thailand uncovered a high degree of intra- and interspecific morphological variation and a wide distribution of the genus ( Nantarat et al. ![]()
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