Contributions to the knowledge of the Eratoidae. X. Revision of the genus Archierato Schilder, 1933 (Mollusca: Gastropoda) Author Fehse, Dirk 0000-0002-4053-2146 Zoological State Collection Munich (ZSM), Departement Mollusca, Muenchhausenstrasse 21, 81247 Muenchen, Germany. triviidae @ gmail. com; https: // orcid. org / 0000 - 0002 - 4053 - 2146 triviidae@gmail.com Author Simone, Luiz Ricardo L. 0000-0002-1397-9823 Luiz Ricardo L. Simone, Museu de Zoologia da Universidade de São Paulo, Cx. Postal 42391, 04218 - 970, São Paulo, SP, Brazil. lrsimone @ usp. br, lrlsimone @ gmail. com; https: // orcid. org / 0000 - 0002 - 1397 - 9823 lrlsimone@gmail.com text Zootaxa 2020 2020-09-09 4851 1 81 110 journal article 8577 10.11646/zootaxa.4851.1.3 7cbff168-82f5-4432-a4ea-c1e8d731d3c3 1175-5326 4407214 A9C94FB4-6A22-4477-9B5A-471345D0D2F2 Archierato panamaensis ( Carpenter, 1856 ) ( Figs. 9 , 18 , 44 ) Erato ? maugeriae var. panamaensis Carpenter, 1856: 162 ; Keen, 1968: 435 (pl. 58, figs. 66a, 66b); Cate, 1977: 361 (text fig. 45). Erato panamaensis : Smith, 1910: 14 . Erato ( Hespererato ) panamaensis: Keen, 1971: 488 (fig. 914). Lectotype . NHMUK 1966619 /1; Hugh Cuming collection; designation by Keen (1968: 435). L 7.5 mm , W 5.2 mm , D 3.5 mm , CT –, LT 14 Type locality. ‘Pacific Panama’. Etymology. Named after the type locality. Diagnosis. Shell large, 7 to 9 mm in length, robust, pyriform, inflated, with widely spaced, coarse labral and posteriorly obscured columellar dentition; ventral fold thick, 16 labral teeth; maximum globosity at posterior third. Description. Shell large, inflated, pear-shaped, with slightly elevated spire. Protoconch and subsequent whorls covered by thin callus. Suture distinct. Body whorl ~90% of total height, maximum diameter at posterior third, convexly tapered anteriorly. Anterior ventral margin largely indented. Dorsum rounded. Dorsal sulcus absent. Whole shell surface covered by very thin, sub-glossy callus. Aperture ~90% of total height, sinuous and slightly widened. Labrum narrow, thickened, smooth, flattened ventrally. Outer labral margin rounded, callused, edged at inner margin. Labral teeth coarse, widely spaced, irregular, 14 in number, restricted to labral edge. Siphonal canal extended, rounded, indented. Anal canal simple, blunt. Columella sinuous, curved without inner carinal ridge and parietal lip. Columellar denticles few, fine, posteriorly obscured, anterior most thickened forming terminal ridge. Fossula obscured, not delimited from columella. Callosities white; anterior tip very pale white-brown; dorsum brown. Variability. Not enough specimens are available to evaluate intraspecific variability. Distribution. Carlsbad, California , U.S.A. , to Panama . ‘Bahía Honda, Veraguas , Panama’ ( Vega & González, 2002: 30 ). Confirmed by a specimen in the author’s collection: Carlsbad, California , U.S.A. (DFB 12089). Material examined. W. Panama : Gobernadora Island , Gulf of Montijo ( DFB 5604 ) . U.S.A. California ; Carlsbad , ( DFB 12089) . Remarks. The shell of Archierato panamaensis is not as colourful as that of A. columbella —only the dorsum is coloured. It is distinguished from the latter species by the inflated shell, the wider, sinuous aperture, the narrow, non-declivous labrum, widely spaced, lesser developed labral denticles, the obscured columellar denticles, and the indented anterior tip (compare Figs. 39 and 40 ).