Megerlia King, 1850

Bitner, Maria Aleksandra, Lozouet, Pierre & Cahuzac, Bruno, 2013, Upper Oligocene (Chattian) brachiopod fauna from the Aquitaine Basin, southwestern France and its paleoenvironmental implications, Geodiversitas 35 (3), pp. 579-606 : 594

Genus Megerlia King, 1850

TYPE SPECIES. — Anomia truncata Linnaeus, 1767 , by the original designation of King (1850: 145).

Megerlia truncata ( Linnaeus, 1767) ( Fig. 8A, B ; Table 8)

Anomia truncata Linnaeus, 1767: 1152 , no. 229.

Megerlia truncata – Logan 1979: 68-72, text-fig. 21; pl. 9, figs 1-23. — Taddei Ruggiero 1985: 372-374, pl. 8, figs 1-6, pl. 9, figs 1-5, pl. 10, figs 1-11, pl. 11, figs 1-10; 1994: 210, pl. 3, figs 3, 4. — Bitner 1990: 145-147, text-fig.10, pl. 2, figs 6-9, pl. 7, figs 3-6, pl. 8, figs 1-7. — Álvarez & Emig 2005: 167, 168, figs 25J-M, 53F, 71. — Dulai 2010a: 28, pl. 3, figs 4, 5.

Megerlia montruosa – Taddei Ruggiero 1985: 374, 375, pl. 1, figs 7-11; 1994: 210, pl. 3, fig. 5.

MATERIAL EXAMINED. — Peyrère:four complete specimens, one ventral and two dorsal valves, MNHN.F. A46535 , A46536 . Material is strongly crushed.

OCCURRENCE. — fflis is one of the commonest species in the Miocene of the Central Paratethys and the Mediterranean region, being also very common today in the Mediterranean and the western Atlantic with the wide depth range from 8 to 1086 m ( Logan 2007). Megerlia truncata is also recorded from the Indian Ocean ( Cooper 1981; Bitner et al. 2008).

REMARKS

Megerlia truncata is very rare in the investigat- ed assemblage, found only in one locality. ffle material is poorly preserved, all specimens are crushed, preventing examination of internal structure. However, the size and characteristic ribbed ornamentation support attribution to this species. fflis is the first record of this species from the Oligocene but the genus Megerlia was already reported from the Oligocene of Hungary ( Dulai 2010b).

Order THECIDEIDA Elliott, 1958 Superfamily THECIDEOIDEA Gray, 1840

Figures

FIG. 8. — Megerlia truncata (Linnaeus, 1767), Upper Oligocene, Peyrère (MNHN.F.A46535), complete specimen in ventral (A) and dorsal (B) views. Scale bar: 3 mm.