Parasinoennea Páll-Gergely & Hunyadi & Grego & Sajan & Tripathy & Chen 2020 (original) (raw)
2020
Abstract
<i>Parasinoennea</i> Z.-Y. Chen & Páll-Gergely, new genus <b>Type species.</b> <i>Ennea splendens</i> Möllendorff, 1882 (Fig. 9A–E). <b>Diagnosis.</b> Shell ovate, glossy; aperture triangular, adnate to the penultimate whorl. <b>Differential diagnosis.</b> The shell shape of <i>Parasinoennea</i>, new genus, is oval, whereas it is usually elongated and cylindrical in <i>Sinoennea</i>. The teleoconch of <i>Parasinoennea</i> is usually smooth, sometimes ornamented by low, blunt ribs, but is always glossy. In contrast, the ribs of <i>Sinoennea</i> are usually sharp and elevated, and the shell has a less glossy appearance. The main difference is in the aperture shape, which is triangular (in some species the palato-basal part distorted laterally) in <i>Parasinoennea</i>, new genus, but elongated oval and cylindrical in <i>Sinoennea</i>. The aperture is adnate (i.e., the parietal callus is attached to the penultimate whorl) in <i>Parasinoennea</i>, new genus, and the parietal callus is always clearly separated from the penultimate whorl in <i>Sinoennea</i>. The apertural dentition is not clearly different, although <i>Parasinoennea</i>, new genus, often possesses two tubercles (denticles) on the columellar peristome (anterior to the columellar lamella), which has not been observed in any <i>Sinoennea</i> species to our knowledge. The upper denticle is probably homologous with the upper denticle of <i>Pupennea</i>, new genus, and <i>Platylennea</i>, new genus. <b>Included species.</b> <i>Parasinoennea demangei</i> (Bavay & Dautzenberg, 1912) (northern Vietnam), <i>P. formica</i> (Bavay & Dautzenberg, 1912) (northern Vietnam), <i>P. splendens splendens</i> (Möllendorff, 1882) (Guangdong, China), <i>P. splendens hongkongensis</i> Möllendorff, 1885 (Hongkong, China), <i>P. ovulum</i> (Bavay & Dautzenberg, 1912) (northern Vietnam) (Figs. 9F–N, 22H). <b>Etymology.</b> The Greek prefix para- (παρά, meaning beside, next to, against, etc.) is attached to <i>Sinoennea</i> to show that it is separated from that ge [...]
Jozef Grego hasn't uploaded this paper.
Let Jozef know you want this paper to be uploaded.
Ask for this paper to be uploaded.