. Bulletin. Science; Natural history; Natural history. 58 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. V I 1 5^m Fig. 3. Catloplax janeirensis (Gray, 1828), Virgin Gorda. British Virgin Islands (AJF 294). Dis- articulated specimen, original length. mm. A. Anterior and posterior valves. B. Intermediate valve. C. Girdle scales. Zoologica (1828:6, sp. no. 9) as ";" of "Chiron ; for which he had already admitted to be "probably a distinct ; My examination of the specimen revealed that it is, indeed, of a species different from the Caribb
. Bulletin. Science; Natural history; Natural history. 58 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. V I 1 5^m Fig. 3. Catloplax janeirensis (Gray, 1828), Virgin Gorda. British Virgin Islands (AJF 294). Dis- articulated specimen, original length. mm. A. Anterior and posterior valves. B. Intermediate valve. C. Girdle scales. Zoologica (1828:6, sp. no. 9) as ";" of "Chiron ; for which he had already admitted to be "probably a distinct ; My examination of the specimen revealed that it is, indeed, of a species different from the Caribbean Calloplax janeirensis: In fact, the specimen (Fig. 2) is conspecific with the later described Callistochiton viviparus Plate, 1902. The Caribbean Calloplax janeirensis is discussed in detail and illustrated by Kaas (1972). It differs from the two other species of Calloplax in the Pacific not only in details of the tegmental sculpture (Fig. 3A, B). but in the girdle scales, which tend to be somewhat polymorphic with irregular and coarse striations (Fig. 3C), and in the spicules which tend to be longer in the specimens ex- amined. An interesting feature of the species is the presence of very long (up to 200 ixm) and closely packed spicules in the cuticular bridges that stand between the valves as tenuous continuations of the girdle. It is also worth noting that in Calloplax janeirensis the apices of the valves iv to vii are often turned upwards, as if "upswept," a feature first described in Callistochiton elenensis (Sowerby, 1832) by Thorpe (//; Keen. 1971:875). In size, Calloplax janeirensis rarely attains 2 cm; the largest specimen I have examined measures mm in length (St. Thomas Bay, Virgin Gorda Is., British Virgin Islands, in 3-5 m, leg. A. J. Ferreira, May 10-13, 1976, AJF sta. 294). As reported in the literature (Kaas, 1972). C. janeirensis is present in most of the tropical Caribbean Province, having been collected from both coasts of Florida, Florida
Size: 2661px × 939px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectscience
