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Zoila gigas

Gastropoda - Cypraeidae

Taxonomy
Cypraea gigas was named by McCoy (1867). Its type specimen is P12139, a shell, and it is a 3D body fossil.

It was recombined as Cypraea (Aricia) gigas by McCoy (1875); it was recombined as Cypraea (Erosaria) gigas by Harris (1897); it was recombined as Gisortia gigas by Vredenburg (1927); it was recombined as Gigantocypraea gigas by Schilder (1930); it was recombined as Zoila (Gigantocypraea) gigas by Schilder (1935); it was recombined as Zoila gigas by Darragh (2011).

Synonyms
  • Cypraea dorsata was named by Tate (1890). Its type specimen is SAM T849, a shell, and it is a 3D body fossil.

    It was recombined as Gisortia dorsata by Vredenburg (1927); it was recombined as Zoila (Gigantocypraea) dorsata by Schilder (1935); it was synonymized subjectively with Zoila gigas by Darragh (2011).
  • Cypraea gabrieli was named by Chapman (1912). Its type specimen is P12366, a shell, and it is a 3D body fossil.

    It was recombined as Gigantocypraea gabrieli by Darragh (1970); it was synonymized subjectively with Zoila gigas by Darragh (2011).
Synonymy list
YearName and author
1867Cypraea gigas McCoy p. 18
1875Cypraea (Aricia) gigas McCoy p. 19 figs. pl. 15; pl. 16, fig. 2; pls. 17–18, fig. 1
1890Cypraea dorsata Tate p. 212
1892Cypraea dorsata Tate figs. pl. 10, fig. 4; pl. 11, fig.6
1897Cypraea (Erosaria) gigas Harris p. 208
1912Cypraea gabrieli Chapman p. 190 figs. pl. 13, figs 1–3
1927Gisortia dorsata Vredenburg p. 58
1927Gisortia gigas Vredenburg p. 58
1930Gigantocypraea gigas Schilder p. 126 figs. 34-5
1935Zoila (Gigantocypraea) dorsata Schilder pp. 337, 338
1935Zoila (Gigantocypraea) gigas Schilder pp. 337, 338 fig. 17
1970Gigantocypraea gabrieli Darragh p. 170
2011Zoila gigas Darragh pp. 21 - 24 figs. 2B, 13E–H, 14A–H, 15A–E

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropoda
subclassCaenogastropoda(Cox 1959)
RankNameAuthor
—Sorbeoconcha(Ponder and Lindberg 1997)
—Hypsogastropoda(Ponder and Lindberg 1997)
superorderLatrogastropodaRiedel 2000
superfamilyCypraeoidea(Rafinesque 1815)
familyCypraeidaeRafinesque 1815
tribeCypraeorbini(Schilder 1927)
genusZoilaJousseaume 1884
speciesgigas()

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.

†Zoila gigas McCoy 1867
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Invalid names: Zoila dorsata Tate 1890 [synonym], Zoila gabrieli Chapman 1912 [synonym]
Diagnosis
ReferenceDiagnosis
T. A. Darragh 2011Shell solid, very large for genus, globose, covered with glaze, humped at dorsal midpoint of shell. Ventral surface flat to slightly concave on most specimens. Spire scarcely projecting, covered with thick callus. Four teleoconch whorls. Protoconch of two whorls, the first depressed, large, irregular, with finely granulated surface, coiled at an angle to axis of teleoconch whorls. Posterior canal bounded by very thick walls, deeply incised, strongly reflexed dorsally, deeply notched. Anterior canal short, about same length as posterior canal, narrow, deeply incised, strongly reflexed dorsally. Aperture very sinuous, widest at beginning of anterior canal; outer lip with 2–28 teeth, on most specimens only extending to midpoint of lip. Columellar lip edentulous. Fossula scarcely differentiated from columellar lip, relatively small, slightly depressed, somewhat rectangular, extending only slightly into aperture, bounded by very weak terminal ridge.