Comprehensive DescriptionRead full entry
“Bairdoppilata (Bairdoppilata) villosa (Brady), 1880
FIGURES 40, 41a-c
Bairdia villosa Brady, 1880, p. 50, pl. 3: fig. 3a-b; pl. 5: fig. 2a-f; pl. 8: 4a-f.
MATERIAL—Three valves and one whole carapace, all mature, in Challenger slide 140, British Museum (Natural History) cat. no. 80.38, labeled as station 149, Balfour Bay, Kerguelen Island. The Whole carapace has been designated lectotype by H. S. Puri, Neil C. Rulings, and Richard H. Benson (MS.).
Two adult males living at Eltanin station 1418.
One immature female tentatively identified as this species, living in an intertidal collection from Prince Edward Island.
DIMENSIONS—Adult male USNM 121344, left valve, length 1.28 mm, height 0.81 mm; right valve, length 1.24 mm, height 0.77 mm.
AFFINITIES—The terminal hinge dentition is less marked in this form than in the more typical shallow-water species of Bairdoppilata; however, it is clearly visible on the Challenger paratype specimens. The lectotype specimen is more highly and angularly arched dorsally than the paratypes, and its hinge has not been seen. The Eltanin specimens are very slightly smaller and more elongate than the paratypes.
The less conspicuous hinge dentition, more convex lateral outline, and short, nearly straight copulatory tube are characters shared by B. (B.?) simplex (Brady) and in part by B. (B.?) hirsuta. For these species another subgeneric category probably should be established.
DISTRIBUTION—Kerguelen I., Macquarie I., Prince Edward I.; reported by Brady (1880) from Tristan d'Acunha and Bass Strait. Subsequent reports of this species are numerous but mostly unconvincing.” (Maddocks 1969b, p.75-77)