ANATOMY AND SYSTEMATICS OF CARDIOLUCINA 



109 



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05=s -*«^ •' 



Fig. 17 Geographical distribution of Cardiolucina quadruta (Prashad). 



(1982, fig. 19) is here designated as lectotype. The holotype of 

 Dentilucina (Bellucina) macassari Prashad is located at ZMA, reg. 

 number 3.32.090 (Fig. 21 c & d). 



TYPE LOCALITY. C. semperiana from Suez, Red Sea. C. macassari 

 from Makassar, South Sulawesi, Indonesia (Siboga Expediton sta- 

 tion 7 1 ). 



Shell description. Shell solid, small, height to a maximum of 

 7.7 mm, sub-circular in outline H/L mean 0.98; inflated, T/L mean 

 0.46, tumidity of single valve to 4.6 mm. Inequilateral, extended 



Fig. 19 Geographical distribution of Cardiolucina rugosa (Hedley). 



anteriorly. Deep sulcus posteriorly with prominent concentric la- 

 mellae. Posterodorsal margin of the sulcus marked by a ridge with 

 prominent short lamellae. Lunule heart-shaped, shallow. Anteriorly, 

 there is a narrow sulcus. Escutcheon lanceolate with fine concentric 

 sculpture. Exterior sculpture of 20-30 low, rounded radial ribs with 

 narrow interspaces. These are crossed by 15-24 projecting, concen- 

 tric lamellae which are often irregularly spaced. In some specimens, 

 concentric lamellae are thickened with steep, ventral edges, giving a 

 stepped appearance to the shell. Hinge plate thick. Left valve with 

 single posterior and anterior lateral teeth and two cardinal teeth, of 



Fig. 18 Cardiolucina rugosa (Hedley, 1909), Hong Kong Harbour, BMNH 1963233. Specimen of Luc ina seminula Gould 1862 from type locality, given 

 by Gould to Cuming, a, exterior of left valve; b, interior of right valve. Scale bar a-b = 1 .0mm. 



