Lyrischapa haimei (d’Archiac & Haime, 1853), d'Archiac & Haime, 1853

Merle, Didier, Pacaud, Jean-Michel, Métais, Grégoire, Bartolini, Annachiara, Lashari, Rafiq A., Brohi, Imdad A., Solangi, Sarfraz H., Marivaux, Laurent & Welcomme, Jean-Loup, 2014, Volutidae (Mollusca: Gastropoda) of the Lakhra Formation (Earliest Eocene, Sindh, Pakistan): systematics, biostratigraphy and paleobiogeography, Zootaxa 3826 (1), pp. 101-138 : 111-112

Lyrischapa haimei (d’Archiac & Haime, 1853)

( Fig. 4 L)

Voluta haimei d’Archiac & Haime, 1853: 325 , p1. 31, figs. 26, 27.

Voluta haimei d’Archiac, 1850: 298 (nomen nudum).

Aulicina haimei . Cossmann & Pissarro 1909: 26, pl. 2, fig. 29 only [new combination]. Volutoconus funiculifer Cossmann & Pissarro, 1909: 27 , pl. 3, figs 10–12.

Aulica (Aulicina) haimei . Vredenburg 1923: 269; Cotter in Vredenburg 1928: 38 [new combination]. Eovasum haimei . Cox 1930: 186 in part (not pl. 21, figs 1–4), see ( Givens 1991) [new combination]; Davies 1934: 297. Lyrischapa haimei . Givens 1991: 664, figs 3.6–3.8 [new combination].

Material. 1 spm (stn 6: CPAG.RAN. I.8, cast MNHN.F.A50346).

Comments. In his paper on Lyrischapa, Givens (1991) gave a revised description of L. haimei . He recognized two differential characters distinguishing it from L. sismondai (d’Archiac & Haime, 1853) , with which it has often been confounded in the past: 1) a shallower shoulder sinus, and 2) the spire is covered with crowded spiral threads alternating in two sizes (a character already cited by Vredenburg 1923). In addition, Vredenburg (1923) noted that the protoconch of L. sismondai is larger than that of L. haimei . From the middle part of Lakhra Formation at Jhirak, we collected a juvenile specimen of H 22 mm ( Fig. 4 L). Although it is a little crushed, it displays these three distinguishing characters of L. haimei .

Stratigraphic range. Lakhra Formation: Jhirak ( Cossmann & Pissarro 1909; Vredenburg 1923; this paper).

Figures

FIGURE 4. A. Lyria sp., CPAG. RAN. I. 1, stn 5; B – H. Mitreola brohii sp. nov., B – C (holotype, CPAG. RAN. I. 2, ventral (B) and dorsal (C) views, stn 4), D (paratype 1, CPAG RAN. I. 3, ventral view, stn 4), E – F (paratype 2, CPAG. RAN. I. 4, ventral (E) and dorsal (F) views, stn 4), G – H (paratype 3, CPAG. RAN. I. 5, juvenile, ventral view (G) and enlarged view of the spire (H), stn 4); I – K. Lyriopsis cossmanni (Vredenburg, 1923), I – J (CPAG. RAN. I. 6, ventral view (I) and enlarged view of the spire (J), stn 4), K (CPAG. RAN. I. 7, ventral view, stn 4); L. Lyrischapa haimei (d’Archiac & Haime, 1853), CPAG. RAN. I. 8, ventral view, stn 6; M – N. Lyrischapa sismondai (d’Archiac & Haime, 1853), M (CPAG. RAN. I. 10, ventral view, stn 6), N (CPAG. RAN. I. 9, dorsal view, stn 3). Scale bars: B – G, I, K – N = 10 mm; A, H, J = 5 mm.