ANATOMY AND SYSTEMATICS OF CARDIOLUCINA 



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Fig. 2 Cardiolucina ciustralopilula Taylor and Glover new species. Beacon Island. Wallabi Group, Houtman Abrolhos Islands, Western Australia, a, 

 Holotype (WAM 1 10-96), exterior of right valve; b. Holotype. exterior of left valve; c, Paratype (BMNH 1996090), exterior of left valve; d, Paratype 

 (BMNH 1996090), interior of left valve; e. interior of right valve of juvenile shell. Eagle Bluff, Peron Point, Shark Bay; f, Holotype dorsal area. Scale 

 bars a-d = 2.0mm, e = 2.5mm, f = 2.0mm. 



tooth, two cardinal teeth, the posterior larger than the anterior, and a 

 single anterolateral. Cardinal teeth sit on a curved, ventrally project- 

 ing buttress. Ligament elongate, extending from beak to posterior 

 lateral tooth. Inner margin of shell thickened with 21 crenulations. 

 Small sinus on posterolateral margin corresponding to the position 

 of the posterior sulcus. Anterior adductor muscle scar narrow, 

 elongate and sited on a buttress with ventral third detached from the 



pallial line. Posterior muscle scar ovate. Pallial line continuous. 

 Shell colour white. 



Juvenile shells (Fig 2e) less inflated, more anteriorly extended. 

 External radial ribs visible on interior of shell. 



Anatomy. The mantle margin is thick and fused only at the 

 posterior exhalant aperture (Fig. 4), and there is no fused inhalant 



