Cenomanocarcinus beardi Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003

Guinot, Danièle, Vega, Francisco J. & Van Bakel, Barry W. M., 2008, Cenomanocarcinidae n. fam., a new Cretaceous podotreme family (Crustacea, Decapoda, Brachyura, Raninoidia), with comments on related families, Geodiversitas 30 (4), pp. 681-719 : 681-719

Cenomanocarcinus beardi Schweitzer, Feldmann, Fam, Hessin, Hetrick, Nyborg & Ross, 2003

OCCURRENCE. — Late Turonian-Coniacian of British Columbia.

Remarks

Cenomanocarcinus beardi was established on the basis of a “needle-like” and “extremely long spine at the anterolateral corner”, and “very well-developed transverse ridges forming an ‘H’ pattern” ( Schweitzer et al. 2003a: 38, 39, fig. 12.1-12.3). As these features are also present in C. inflatus ( Fig. 1B, E ) and C. vanstraeleni (Fig. 5D), we agree with the generic assignment. The specific characters of C. beardi may be the much longer epibranchial tooth and the stronger tubercles on the dorsal carapace.

The close similarity of C. inflatus , C. vanstraeleni ,

C. oklahomensis and C. beardi is so remarkable that a

Guinot D. et al.

direct comparison of all these species is highly desirable, especially in view of the intraspecific variation observed in Stenzel’s type series of C. vanstraeleni (see Addenda).

Figures

FIG. 1. — A, B, E, F, Cenomanocarcinus inflatus Van Straelen, 1936, upper Cenomanian, Le Mans; C, D, Campylostoma matutiforme Bell, 1858, lower Eocene (Ypresian), London Clay, Isle of Sheppey (B. van Bakel Colln); A, B, paralectotype, 44 × 52 mm (MNHN R05504);E, F, topotypical specimen, 27 × 38 mm, estimated width at least 40 mm by including complete epibranchial spines (MHN LM 3806);E, dorsal carapace with partially preserved epibranchial spines;A, frontal view; B, dorsal carapace;C, frontal view;D, dorsal