Stromboidea

• Aporrhaidae
  • Lispodesthes
    • Lispodesthes panda Stephenson, 1952

Original description of Lispodesthes panda by Stephenson, 1952:

• ”Shell small, with plump body and rather low spire; spiral angle about 47°. Protoconch not clearly uncovered but apparently low turbinate, with 1 or 1½ coils; in adults the protoconch is inwrapped in a mantle of callus. Suture closely appressed, sharply, but not deeply, impressed. Whorls 4, rather rapidly expanding, ornamented with spiral lirae that usually become completely covered with a mantle of callus in the adult stage. The body whorl bears about 15 low, narrow, primary lirae, those on the more inflated part of the shell being the strongest and most widely spaced; the fifth one from the top is the strongest. Secondary lirae may be introduced in the interspaces, and these increase in strength in the forward direction. Eight lirae are exposed on the penultimate whorl. The periphery and base of the body whorl are broadly rounded, and the base descends with moderate steepness. Growth lines sinuous, broadly convex in trend, forward on the base below and convex rearward on the part above the periphery. Aperture long-lanceolate, acutely angular at the rear, with a narrow anal channel incised in callus extending up the sides of the spire to, and 1.5 to 2 mm above, its tip, and with a moderately long, very narrow, strongly curved siphonal canal at the front. Outer lip of adults thick, dually expanded to form an upper long, narrow, upturned, pointed, sickle-shaped prong and a lower, much shorter, stubby, downward- and inward-turned projection; about halfway around the inflated part of the body whorl a pair of ribs arises, the upper and stronger rib continuing forward and out onto the upper prolongation of the lip to its tip and the lower rib diverging downward and extending as a weak ridge well out onto the lower prolongation; the rib that traverses the upper prong is reflected on the inner surface as a narrow, sharply incised channel that extends from the inner surface of the body whorl to the tip. Inner lip very broadly excavated and, in the adult, forming a deposit of callus that spreads forward and around the outer surface of the shell. Callus also spreads backward from the outer lip over the outer surface of the shell; the layers of callus from the inner and outer lips eventually meet, thus completely concealing the sculpture over the entire surface."

Locus typicus: near old Slate Shoals, Red River, 8 miles east of Arthur City, Lamar County, Texas, USA

Stratum typicum: Templeton Member, Woodbine Formation, Cenomanian, upper Cretaceous

Dimensions: Holotype: height about 18.2 mm; diameter, exclusive of the expanded lip about 8.5 mm; including this lip, 15 mm.

Types: Holotype: Smithsonian Museum PAL 105853, Paratypes: PAL 105855, 5 specimens, see Smithsonian Collection catalog

References

• Stephenson, 1952