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Lapsigyrus

Gastropoda - Rissoidae

Taxonomy
Lapsigyrus was named by Berry (1958). It is extant.

It was assigned to Rissoidae by Ponder (1984).

Synonymy list
YearName and author
1958Lapsigyrus Berry
1984Lapsigyrus Ponder pp. 95 - 96

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassCaenogastropoda(Cox 1959)
—Sorbeoconcha(Ponder and Lindberg 1997)
—Hypsogastropoda(Ponder and Lindberg 1997)
superfamilyRissooideaGray 1847
familyRissoidaeGray 1847
genusLapsigyrusBerry 1958

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. Lapsigyrus Berry 1958
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Lapsigyrus mutans Carpenter 1857
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Invalid names: Lapsigyrus contrerasi Jordan 1936 [synonym]
Diagnosis
ReferenceDiagnosis
W. F. Ponder 1984Shell: small, ovate-conic, moderately solid, imperforate, with lightly convex whorls, sharp spiral ribs and weak axial threads. Aperture rather large, pyriform to D-shaped, rounded anteriorly, sharply angled and very narrowly channelled posteriorly, withsimple peristome. Outer lip slightly opisthocline, with a narrow, rather weak varix; inner lip closely applied to parietal wall. Base simple, lacking a basal fold (Figs 65; 143A). Protoconch small, somewhat conical, of 2-3 convex whorls, apparently smooth except for sinuous growth lines (Fig. 143C).