Indoweyla coxi Fürsich & Heinze, 1995
JAITLY, A. K., F. T. FÜRSICH & M. HËINZE. 1992. Contributions to the Jurassic of Kachchh, western India. IV. The bivalve fauna. Part I. Subclass Palaeotaxodonta, Pteriomorphia, and Isofilibranchia. Beringeria, 16: 147-257. [p. 199, pl. 20, figs. 13-15]
1995 Indoweyla coxi Fürsich & Heinze, 1995
«Material. Lower Callovian of Atainakanga: 1 RV (BSPG 2015 XIII 176).
Description. Shell suborbicular, well inflated, but umbonal area depressed; anterior auricle triangular, with byssal notch, posterior auricle broken off. Ornamentation consisting of approximately 20 broadly arched radial ribs, separated by much narrower interstices. Both ribs and interstices are covered with 4 to 6 and 1 to 2 secondary radial riblets, respectively. Anterior auricle with well developed growth lines and radial riblets, creating a reticulate pattern.
Remarks. Indoweyla is a rare faunal element within the Ethiopian faunal province. Apart from Indoweyla coxi individuals occurring in this province have been accommodated in two more species, Pecten rochi Agrawal (1956: 75, pl. 9, figs, 1, 2) and Pecten kachhensis Cox (1952: 21, pl. 2, fig. 4a, b). These species come from the Callovian of Kachchh (rochi and kachhensis) and Madagascar (rochi), and differ only in small details. In Pecten rochi radial ribs are commonly paired and secondary radial riblets are present, albeit in lower numbers. Pecten kachhensis appears to lack secondary radial riblets. Whether these differences deserve separation at the species
level is, at present, not clear. We cannot exclude that Indoweyla coxi and Pecten rochi are in fact junior synonyms of Pecten kachhensis. However, without the knowledge of left valves, no final conclusion can be reached at present.» FÜRSICH, F. T. , M. HEINZE & W. S. AYOUB-HANNAA. 2019. Middle to Upper Jurassic bivalves of the southwestern Morondava Basin (Madagascar). Zitteliana, 93: 143-203, pls. 1-17. [p. 164]
|
Indoweyla coxi Fürsich & Heinze, 1995; F. T. Fürsich, M. Heinze & W. S. Ayoub-Hannaa, 2019, Middle to Upper Jurassic bivalves of the southwestern Morondava Basin (Madagascar), plate 5, figure 9.
|