Adipicola leticiae Crespo 2017, new species

• Main Author: Crespo, Enrique
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Mytiloida; Mytilidae; Adipicola; Adipicola leticiae; Balaenoptera borealis; Sei Whale
• Online Access: https://doi.org/10.5281/zenodo.6038776

Adipicola leticiae new species Figs 2A ̄J, 3ĀK, 4ĀD Type material. Holotype CNP-Inv 2 229 and twelve paratypes: CNP-Inv 2230, one articulated specimen, CNP-Inv 2231, one articulated specimen, CNP-Inv 2232, one articulated specimen and CNP-Inv 2233, nine articulated specimens, all attached to the skull of a sei whale Balaenoptera borealis. Type locality. 46° 10´S; 61° 50´W, off San Jorge Gulf, Argentina, from a depth of 104 m (Fig. 1). The collection date was July 21, 2010. Etymology. This species is dedicated to Leticia Mercante, the first author´s wife, for her invaluable support during many years. Diagnosis. The new species is characterized by the combination of the following characters: adult shell of medium size, up to 20 mm in length, elongate, fragile, ventral margin straight, distance from umbos to anterior shell margin about 30% of shell length; larval shell with prodissoconch 1 of about 175 µm and prodissoconch 2 with a size between 425 to 580 µm in length. Description. Shell, fragile, subequilateral, equivalve, subrectangular, with anterior end rounded, dorsalanterior margin anteriorly inclined, lunule not defined; dorsal-posterior margin straight, posterior end rounded, ventral margin straight; umbones prosogyrate, not in touch, placed at 30% of shell length measured from the anterior margin. Periostracum dark-reddish brown. Ligament extending along the dorsal-posterior margin for about 65% of posterior length. External surface smooth with irregular growth wrinkles, periostracal hair absent. Internally white, porcelaneous, pallial line complete, without sinus; hinge plate without teeth or crenulations below umbo or behind ligament; posterior adductor scar circular, anterior scar oval, slightly smaller; pedal retractors fused with the posterior byssal retractors just above the posterior scar; anterior retractor scars not observed; prodissoconch 1 about 175 µm, prodissoconch 2 size between 425 to 580 µm in length. No direct anatomical observations could be made on the dried remains. Morphological ...