Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 97. Texanites collignoni sp. nov. Paratype SAS-Z866. x 0,58. 130 ANNALS OF THE SOUTH AFRICAN MUSEUM from the umbilical edge, a prominent radially elongated, lateral (2) tubercletowards the dorsal third of the flanks (this tubercle juts out furthest laterallythough it is not necessarily strongest developed), and progressively clavatesubmarginal (3), marginal (4) and external (5) tubercles over the rest of theflanks. With increasing diameter, and especially towards the body chamber,the umbilical and the lateral tub
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 97. Texanites collignoni sp. nov. Paratype SAS-Z866. x 0,58. 130 ANNALS OF THE SOUTH AFRICAN MUSEUM from the umbilical edge, a prominent radially elongated, lateral (2) tubercletowards the dorsal third of the flanks (this tubercle juts out furthest laterallythough it is not necessarily strongest developed), and progressively clavatesubmarginal (3), marginal (4) and external (5) tubercles over the rest of theflanks. With increasing diameter, and especially towards the body chamber,the umbilical and the lateral tubercles move ventrally, so that the former issome distance from the umbilical region and the latter nearer midflank. Intypical forms ribbing is single, but some specimens feature bifurcations. Thekeel is undulating; undulations coinciding with lateral Fig. 98. Texanites collignoni sp. nov. Holotype SAM-PCZ5920. x 0,5. CRETACEOUS FAUNAS FROM SOUTH AFRICA 131
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Photo credit: © The Reading Room / Alamy / Afripics
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
