Raninella trigeri A. Milne Edwards, 1862

Van Bakel, Barry W. M., Guinot, Danièle, Artal, Pedro, Fraaije, René H. B. & Jagt, John W. M., 2012, A revision of the Palaeocorystoidea and the phylogeny of raninoidian crabs (Crustacea, Decapoda, Brachyura, Podotremata) 3215, Zootaxa 3215 (1), pp. 1-216 : 95

Raninella trigeri A. Milne Edwards, 1862

Raninella trigeri A. Milne Edwards, 1862: 492 .

( Fig. 26A–E )

Material examined. From the upper Cenomanian of Le Mans, Butte de Gazonfier, two specimens, carapace and chelipeds ( MHN LM 2003-1-3787A and B; Guéranger Collection); designated lectotype by Breton & Collins (2007: 18), complete specimen preserving chelipeds, portions of thoracic sternum and pereiopods ( MNHN B16565; Triger Collection); paralectotype (see Brocchi 1877: pl. 29, fig. 3), one of the two carapaces (see also under Raninella elongata ) ( MNHN R03934); carapace with thoracic sternum and chelipeds, labels reading ‘ Raninella trigeri ’ and ‘ Hemioon elongatum ’(see Waugh et al. 2009: 27, figs. 5.3, 5.4) ( NHM In. 63689 (Taylor & Hammond Collection).

Remarks. Raninella trigeri (see A. Milne Edwards 1862: 493; Brocchi 1877: 2), from the Cenomanian of the Le Mans region (northern France), is known from a handful of well-preserved specimens. The lectotype (MNHN B16565) is well-preserved, retains both chelipeds as well as portions of the thoracic sternum and walking legs and shows exposed pleurites.

Figures

FIGURE 26. Raninella trigeri A. Milne Edwards, 1862 (Raninidae, Ranininae), upper Cenomanian, Butte de Gazonfier, Le Mans (northwestern France); A, C, E. NHM LM 2003-1-3787A (indeterminate sex); left lateral view of carapace and cheliped (arrow indicating crest on merus of left cheliped); dorsal view of carapace and chelipeds, and frontal view showing chelipeds; B. NHM In. 63689 (male); ventral view showing thoracic sternum and base of appendages; D. MNHN B16565 (lectotype; indeterminate sex); dorsal view of carapace. iol, infraorbital lobe. Scale bars: 10mm.