Volutidae (Mollusca: Gastropoda) of the Lakhra Formation (Earliest Eocene, Sindh, Pakistan): systematics, biostratigraphy and paleobiogeography Author Merle, Didier Author Pacaud, Jean-Michel Author Métais, Grégoire Author Bartolini, Annachiara Author Lashari, Rafiq A. Author Brohi, Imdad A. Author Solangi, Sarfraz H. Author Marivaux, Laurent Author Welcomme, Jean-Loup text Zootaxa 2014 3826 1 101 138 journal article 45364 10.11646/zootaxa.3826.1.3 6f4b1535-6c6b-4446-aa26-b1ba83ad9126 1175-5326 228537 53549D58-8F38-47B5-879F-0245E900C131 Lyria sp. ( Fig. 4A ) Description. Fragment of a narrow spire, H 14.8, D 9.0 mm. Protoconch eroded, probably paucispiral. Teleoconch of four whorls, the last broken. Whorls high, weakly convex, delineated by a deep, linear suture. Axial sculpture of strong but narrowly rounded costae, almost corresponding from whorl to whorl. No spiral sculpture. Costae opisthocline, rather straight. Columella with at least three folds. Material. 1 spm (stn 5: CPAG .RAN. I.1 , cast MNHN .F. A50339 ). Comments. Although the aperture of this specimen is lacking, the shape of its teleoconch whorls is similar to those found in other members of Lyria , as for example in Lyria subturgidula (d’Orbigny, 1850) from the Middle Eocene of the Paris Basin. By its high whorls and its straight costae, this specimen is easily distinguishable from Lyria cossmanni Vredenburg, 1923 (=? L. feddeni Vredenburg, 1923 ) from the Lakhra Formation and from Lyria samanaensis Cox, 1930 from the Hangu Formation (Samana Range, North Pakistan ). Both species belong to another genus, Lyriopsis nov. gen., described below. Stratigraphic range. Lakhra Formation: Lakhra Dome.