Gyrostrea sp. A

Musavu Moussavou, Benjamin, 2017, Systematics, palaeoecology and taphonomy of Turonian oysters from the northern Gabon Coastal Basin, Geodiversitas 39 (2), pp. 213-224 : 218-220

Gyrostrea sp. A

( Fig. 3 A)

MATERIAL. — 1 specimen (MDG/LBV/Lm-13).

OCCURRENCE. — Turonian of Gabon (this study).

DESCRIPTION

Shell, represented by LV, is medium, inequilateral, elongated to elliptical shape in outline. Anterior and posterior margin are curved giving semicircular shape of shell. Attachment area is small. Surface rough with growth squamae and few rough rounded irregular ribs well separated from each other.

REMARKS

This species differs to Gyrostrea delettrei ( Coquand, 1862) in having small irregular ribs.

Figures

FIG. 3. — A, Gyrostrea A MDG/LBV/Lm-13;B, C, Rhynchostreon cf.suborbiculatum (Lamarck,1801) MDG/LBV/Lm-9;D-F, Gryphaeostrea sp.;D-E, MDG/LBV/Lm- 7.1, F. MDG/LBV/Lm-7.2; G, H, Curvostrea tevesthensis (Coquand,1862) MDG/LBV/Lm-11;I-M, Ilymatogyra (Afrogyra) africana (Lamarck, 1801); I, J, MDG/LBV/ Lm-8.3,K.MDG/LBV/Lm-8.2,L-M.MDG/LBV/Lm-8.1;N, Q, Ostreidea gen.et sp.;indet MDG/LBV/Lm-34;O,P.Pycnodonte sp.MDG/LBV/Lm-10.Scale bar:1 cm.