The Family Seguenziidae Verrill, 1884 in the Northeast Pacific, including a comment on excessive numbers of taxonomic data portals Author Geiger, Daniel L. text Zoosymposia 2019 2019-02-19 13 61 69 journal article http://dx.doi.org/10.11646/zoosymposia.13.1.7 c6aa05ac-8e39-4b3f-bfe1-b0e6b1a7ecf9 1178-9905 3558484 urn:lsid:zoobank.org:pub:16D27C71-5A6C-4ADF-AD6C-6B07C2773112 Asthelys Quinn, 1987 ( Figure 1D ) Asthelys Quinn, 1987: 66 . Type species (OD) Basilissa munda Watson, 1879 . Atlantic Ocean. Description: Shell small, biconical, bicarinate whorls macroscopically smooth, aperture trapezoidal.