. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. SOME SOUTH AFRICAN AEOLIDACEAN NUDIBRANCHIA 135. Fig. 14. Catriona casha sp. nov. Scanning electron micrograph of the radula. Scale: 10 um between squares. of the South African specimens of C. columbiana agree closely with that of the holotype of C. alpha described by Baba & Hamatani (1963a) and Roller (1969), and there is little doubt that they are conspecific. Williams & Gosliner (1979) considered C. alpha (Baba & Hamatani 1963a) and C. spadix (MacFarland 1966) as junior synonyms of C.
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. SOME SOUTH AFRICAN AEOLIDACEAN NUDIBRANCHIA 135. Fig. 14. Catriona casha sp. nov. Scanning electron micrograph of the radula. Scale: 10 um between squares. of the South African specimens of C. columbiana agree closely with that of the holotype of C. alpha described by Baba & Hamatani (1963a) and Roller (1969), and there is little doubt that they are conspecific. Williams & Gosliner (1979) considered C. alpha (Baba & Hamatani 1963a) and C. spadix (MacFarland 1966) as junior synonyms of C. columbiana (O'Donoghue, 1922). Within the geogra- phical range of C. columbiana, the cerata vary from pale yellowish-brown to light pink, orange, brown or vermilion with external opaque white over the whole surface or restricted to a white longitudinal line or subapical band on the cerata. The brighter coloured specimens (North America) have orange rhinophores and oral tentacles, while in the paler specimens (Japan, South Africa) the orange pigment is restricted to a band on the rhinophores. Although Williams & Gosliner (1979) stated that C. columbiana characteristically has only 2 large lateral denticles on the radular tooth, it should be noted that Baba & Hamatani (1963a) showed the possession of 2 or 3 denticles. South African specimens also possess 2 or more commonly 3 lateral denticles interspersed with 0, 1, or 2 minute denticles. The penial stylet in C. columbiana from South Africa is small and is visible only under high magnification. It is embedded in the tip of the elongate penis (Fig. 11F-G) and resembles that described for C. columbiana (MacFarland 1966, as C. spadix). The presence of a penial stylet in C. columbiana as C. alpha) was not described by Baba & Hamatani (1963a), but was confirmed by Roller (1969). The shape of the penis (Baba & Hamatani 1963a, pi. 11 (fig. 6)) resembles that of the South African specimens. Regrettably the penis and style
Size: 1645px × 1519px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
