Galeodea californica, CLARK, 1942

Squires, Richard L., 2019, Revision of Eocene warm-water cassid gastropods from coastal southwestern North America: implications for paleobiogeographic distribution and faunal-turnover, PaleoBios 36, pp. 1-22 : 9

GALEODEA CALIFORNICA CLARK, 1942

FIG. 4A–C

Galeodea (Caliagaleodea) californica Clark, 1942 . p.

118; pl. 19, figs. 15–19.

Galeodea californica Clark. Givens and Kennedy, 1979 . p. 86.

Galeodea (Caliagaleodea) californica Clark. Squires, 1984 . p. 26; fig. 7j. Squires. 1988a. pl. 1, fig. 12; Squires. 1988b. p. 13, fig. 29. Squires and Demetrion, 1994. p. 130; fig. 9.

Primary Type Material— Holotype UCMP 34376 and paratype UCMP 34377 , both from UCMP Locality UCMP 7004 , Llajas Formation , north side Simi Valley , Ventura County, southern California.

Material examined— The thirty-one specimens include: Hypotypes LACMIP 6530 , 14834 , and 28 unfigured topotype specimens .

Emended description— Shell small to medium size (up to 33 mm height, incomplete), globose with thin shell. Spire very small, low, mostly submerged. Sutural “ramp” flat, between spire and last whorl. Callus thin to absent on parietal region of inner lip. Spiral ribs prominent, numerous, and smooth with wide interspaces, especially on most of last whorl. Spiral ribs on neck much thinner, very weak, and bearing closely spaced minute weak nodes. Interspaces on shell neck narrower and bearing three or four spiral threads. Anterior canal moderately long, twisted leftward (broken on nearly all specimens), and umbilicate. Episodic varices lacking. Terminal varix wide, flange-like, and reflected.

Stratigraphic occurrence— Lower Eocene to lower middle Eocene, southern California to Baja California Sur, Mexico. “ Capay Stage ”: Bateque Formation, Baja California Sur, Mexico ( Squires and Demetrion 1994); “ Domengine Stage ”: Juncal Formation?, northern Lockwood Valley, Ventura County, southern California ( Squires 1988c; [for age update, see Squires (2000)]. Llajas Formation, Simi Valley, Ventura County, southern California ( Clark 1942; Squires 1984); lower Scripps Formation, San Diego, San Diego County, southern California ( Givens and Kennedy 1979).

Remarks— Most of the specimens are internal molds or nearly so. The anterior canal is broken off on nearly all of them. Clark (1942) named Caliagaleodea as a subgenus of Galeodea . Beu (2008: p. 288) regarded Caliagaleodea as a synonym.

Figures

Figure 4. See caption on the bottom of page 11.