Cerithiopsis

Abstract: Cerithiopsidae H. & A. Adams is defined; 37 New Zealand Recent species and 1 subspecies, and all genera with Recent type-species, including some with fossil representatives, are allocated to Cerithiopsinae H. & A. Adams, Eumetulinae Golikov & Starobogatov, and Aliptinae n.subfam. Seilidae Golikov & Starobogatov is reduced to tribal rank in Cerithiopsinae. Cerithiellidae Golikov & Starobogatov is maintained as a discrete family within Cerithiopsoidea, and Ataxocerithium Tate and Seilopsis Tomlin are referred there. Conciliopsis Laseron is synonymised with Cerithiopsis Forbes & Hanley, the genus is defined, and a lectotype is designated for the type-species Cerithiopsis tubercularis (Montagu). Cinctella Monterosato is resurrected from synonymy with Seila A. Adams for the Mediterranean Seila trilineata (Philippi). The following species are newly synonymised: Seila dissimilis Suter with Specula styliformis (Suter); Cerithiopsis canaliculata Suter with Specula retifera (Suter); Cerithiopsis subantarct...

Abstract: The ectoparasitic gastropod genus Cerithiopsis Forbes & Hanley, 1850 was nominally based on Murex tubercularis Montagu, 1803. We have used the DNA barcode COI sequences to assay sympatric samples of morphotypes recently described as distinct species of the Cerithiopsis tubercularis-complex. Our results demonstrated that, in the Croatian waters, the gastropods usually called C. tubercularis in fact comprise a complex of cryptic species, which can be reliably diagnosed only by examining the soft parts. In the present study we have demonstrated that the colour pattern of the head-foot is diagnostic at the species level in this complex and, coupled with genetic data, may provide a sounding base for a revision of the cerithiopsids of the European coasts.

Abstract: With Parts 3 and 4 of the current series, the taxonomic revision of Pliocene gastropods from temporary exposures at Kallo (Oost-Vlaanderen, Belgium) is completed. Material collected from the early Pliocene Kattendijk Formation and the middle-late Pliocene Oorderen, Kruisschans and Merksem members of the Lillo Formation is described and illustrated, and stratigraphic and geographic ranges of species are discussed. Twenty-nine (sub)species are new to the Belgian Pliocene, viz. Lamellaria perspicua (Linne, 1758), Euspira cirriformis gottschei (Kautsky, 1925), Cryptonatica operculata (Jeffreys, 1885), Krachia zelandica (Beets, 1946), Cerithiopsis barleei Jeffreys, 1867, Cerithiopsis nana (Wood, 1848), Aclis ascaris (Turton, 1819), Cirsotrema (C.) fimbriosum exfimbriosum Sacco, 1891, Vitreolina philippii (Rayneval & Ponzi, 1854), Crinophteiros collinsi (Sykes, 1903), Pterynopsis binominatus (Staadt in Cossmann, 1909), Trophon barvicensis (Johnston, 1825), Anachis anglica (Bell in Wood, 1874), Fusinus longiroster (Brocchi, 1814), Babylonella fusiformis subangulosa (Wood, 1848), Pyramidella plicosa Bronn, 1838, Evalea divisa (J. Adams, 1797), Ondina obliqua (Alder, 1844), Anisocycla nitidissima (Montagu, 1803), Menestho britannica Bell, 1873, Brachystomia albella (Loven, 1846), Diaphana minuta Brown, 1827, Cylichna concinna (Wood, 1839), Philine ventrosa (Wood, 1839), Philine denticulata (J. Adams, 1800) and Limacina atlanta (Morch, 1874). Brachystomia cerullii nov. nom. is proposed to replace Brachystomia lineolata (Cerulli-Irelli, 1914) non Sandberger, 1859, while Cerithiopsis keukelaari is described as new, and previous records of ‘Cerithiopsis tuberculata (Montagu, 1803)’ are shown not to belong to that species but to four others.

Abstract: Murex tubercularis Montagu, 1803, type species of the genus Cerithiopsis Forbes & Hanley, 1851, is re- considered on the basis of its original material, other relevant specimens in museum collections, and per- tinent literature and personal data. Since there is a general agreement on teleoconch characters, this work focuses on the protoconch. The latter is conical, of 4.15-4.75 moderately convex whorls, with subsutural and suprasutural spiral rows of granular microprotuberances. It results that a number of specimens with differently sculptured larval shells, hitherto identified as Cerithiopsis tubercularis, do not belong to it. Ma- jor issues of this study are: 1) the type lot of Cerithiopsis tubercularis contains more than one taxon, 2) the identity of the syntype formerly designated lectotype of Cerithiopsis tubercularis is much doubtful, and 3) the existing name-bearing type of Cerithiopsis tubercularis is not in taxonomic accord with the prevailing usage of the name. Accordingly, a possible syntype in Natural History Museum (London) is selected as neotype of Cerithiopsis tubercularis. In this paper, the genus Cerithiopsis is intended rather strictly, to ac- commodate species with general protoconch characters basically conforming to those of the type species. The new genus Nanopsis, with type species Cerithiopsis nana Jeffreys, 1867, is proposed along with the new species Nanopsis buzzurroi and Nanopsis denticulata. Riassunto Murex tubercularis Montagu, 1803, specie tipo del genere Cerithiopsis Forbes & Hanley, 1851, viene critica- mente revisionata sulla base del suo materiale originale, di altri esemplari significativi contenuti in collezioni museali, di informazioni pertinenti fornite dalla letteratura e di dati personali. Dal momento che vi e un sostanziale accordo sui caratteri della teleoconca, questo lavoro si focalizza sulla protoconca che risulta es- sere conica, di 4.15-4.75 giri convessi, con protoconca II fornita di microgranuli suprasuturali e subsuturali grossolanamente disposti in file spirali. Ne consegue che vari esemplari la cui protoconca presenta una dif- ferente microscultura, di solito attribuiti a Cerithiopsis tubercularis, non possono appartenere a questa spe- cie. I principali risultati di questo lavoro sono: 1) i sintipi di Cerithiopsis tubercularis non sono conspecifici e rappresentano piu di una specie, 2) l'identita del sintipo in precedenza designato come lectotipo di Ceri- thiopsis tubercularis appare alquanto dubbia, 3) il lectotipo esistente di Cerithiopsis tubercularis e tassono- micamente discrepante dal concetto prevalente di Cerithiopsis tubercularis. Di conseguenza, un possibile sintipo presente nel Natural History Museum di Londra viene qui proposto come neotipo di Cerithiopsis tu- bercularis. L'esame dei sintipi di Cerithiopsis barleei Jeffreys, 1867 ha permesso di rilevare che questa specie ha una protoconca con caratteri molto diversi da quella di Cerithiopsis tubercularis e, quindi, di respingere la sinonimia di Cerithiopsis barleei con la specie di Montagu postulata da alcuni autori. In questo lavoro, la specie Cerithiopsis barleei e attribuita al genere Prolixodens Marshall, 1978. Il genere Cerithiopsis viene in- terpretato in maniera restrittiva e in esso vengono incluse solo specie con caratteri della protoconca sostan- zialmente simili a quelli della specie tipo. Si introduce il nuovo genere Nanopsis, con specie tipo Cerithiopsis nana Jeffreys, 1867, e si propongono le due nuove specie Nanopsis buzzurroi e Nanopsis denticulata.