Laona californica Willett 1944

• Main Authors: Valdés, Ángel, Cadien, Donald B., Gosliner, Terrence M.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Cephalaspidea; Philinidae; Laona; Laona californica; Arctic
• Online Access: https://doi.org/10.5281/zenodo.6066650; http://treatment.plazi.org/id/F67B87E8303FFFE86B8EF9B4FD176EBD

Laona californica (Willett, 1944) Figures 1–2 Philine californica Willett 1944: 72, pl. 14, fig. 4. Philine sp. 2 Gosliner 1996: 183, figs. 2.9B, 2.10A. Type material. Holotype (LACM 1074): off Redondo Beach, California, 91 m depth (Fig. 1 C). Other material examined. Six miles southwest of Seal Beach, California (33º36.5’N, 118º06.4’W), 48 m depth, R/ V Velero III (AHF BS 1135), 16 Feb 1941, 1 shell with dried soft parts, 4.6 mm long (LACM 41-228.4). North flank of the Redondo Submarine Canyon, Santa Monica Bay, California (33º49.25’N, 118º32.95’W), 208 m depth, R/ V Ocean Sentinel (Southern California Bight Project, stn. 1175), 18 Jul 1994, 1 specimen 6 mm preserved length, leg. Cadien (LACM 178900). Description. Live animal unknown. The specimen here examined was contracted and the cephalic shield not visible (Fig. 1 A). Shell internal, covered with tissue. Shell to 5.5 mm long, elongate, inflated (Fig. 1 D–E). Spire sunken. Aperture very large, oval, narrowing posteriorly. Outer lip extending above apex. Columella slightly thickened. Inner lip twisted, flattened at intersection with body whorl. Sculpture of fine axial striations crossed by spiral lines forming a net-like pattern. Mature adult individuals often bear sharp raised spines at the intersections of the axial and spiral lines. Shell color white, in some specimens with a light brown band. Digestive system with an oval buccal mass, surrounded by the central nervous system anteriorly (Fig. 2 A). Two salivary glands connect with the buccal bulb at the insertion point of the esophagus. Esophagus short, simple, thin-walled. Gizzard and gizzard plates absent. Radular formula 12 x 6.1.0.1.6. Innermost lateral teeth large, hookshaped, smooth, lacking denticles (Fig 1 B). Outer teeth elongate, smooth. Gizzard plates absent. Male reproductive system with a long and simple prostate connected to an undiferentiate penis (Fig. 2 B). Range. Southern California (Fig. 3 A). Depth range 48–208 m. Remarks. Willett (1944) placed Philine californica in the “section” ...