. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. MID-CRETACEOUS OSTRACODA 173 Diagnosis Species with curved DM, weakly convex VM, and slightly ventrally de- flected PM apex. Description External features. Plump ovate aspect in lateral view. AM broadly rounded, DM convex, VM weakly convex, PM acutely rounded with apex directly slightly ventrally. Highest point of valve at mid-length. Valve surface smooth. Internal features. MA moderately wide, with numerous (c. 15) fine RPC an- teriorly. Hinge merodont, gently curved: in RV ATE has five teeth, PTE h
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. MID-CRETACEOUS OSTRACODA 173 Diagnosis Species with curved DM, weakly convex VM, and slightly ventrally de- flected PM apex. Description External features. Plump ovate aspect in lateral view. AM broadly rounded, DM convex, VM weakly convex, PM acutely rounded with apex directly slightly ventrally. Highest point of valve at mid-length. Valve surface smooth. Internal features. MA moderately wide, with numerous (c. 15) fine RPC an- teriorly. Hinge merodont, gently curved: in RV ATE has five teeth, PTE has six teeth, ME is a crenulate groove; in LV TE are sockets with ventral ledges, ME is a curved denticulate bar and a narrow, overhung accommodation groove. MS consist of a curved row of four rounded adductors and a large rounded anterior scar (Fig. 32).. Fig. 32. Muscle scars of Pirileberis ma- katiniensis sp. nov., SAM-PC6109, RV, locality 171-21, Mlambongwenya Spruit, Albian III. Scale bar = 30/a. Remarks P. makatiniensis differs from the type species (P. progonata Grekoff, Kim- meridgian to Valanginian of Madagascar) in having a straighter VM in lateral view, its line of greatest length well below mid-height, and in its MS pattern, which has the anterior scar in a more ventral position. P. makatiniensis differs from P. mkuzensis sp. nov. in details of lateral outline, hinge structure, and MA. imensions (mm) length height 6107 0,53 0,35 6108 0,52 0,37 6109 0,53 0,30 6110 0,53 0,35. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
