Aeger spinipes ( Desmarest, 1817 )

Odin, Giliane P., Charbonnier, Sylvain, Devillez, Julien & Schweigert, Günter, 2019, On unreported historical specimens of marine arthropods from the Solnhofen and Nusplingen Lithographic Limestones (Late Jurassic, Germany) housed at the Muséum national d’Histoire naturelle, Paris, Geodiversitas 41 (17), pp. 643-662 : 645-647

Aeger spinipes ( Desmarest, 1817)

( Fig. 1D )

DIAGNOSIS (from Schweigert et al. 2016). — Extremely elongate rostrum, with one medium ventral tooth; Mxp3 extremely long, with movable spines; chelate P1-P3; P1-P2 bearing long movable spines; P3 with smooth chelae; achelate P4-P5 and spineless; P3 slightly larger than P1- P2; well-developed pleopods; uropodal exopod with rounded diaresis.

STUDIED MATERIAL. — Charbonnier & Garassino (2012) listed and figured only one specimen (MNHN.F.B13441, Eichstätt). We add two specimens from Solnhofen, MNHN.F.B13440, B13442 ( Fig. 1D ), formerly identified as A. tipularius .

COMMENT

Our assignation is based on the extremely elongate rostrum.

B D

Figures

FIG. 1. — A-C, Aeger tipularius (Schlotheim,1822),specimen MNHN.F.A33509 from Solnhofen;A, natural light;B, interpretation of the carapace grooves;C, UV light; D, Aeger spinipes (Desmarest, 1817), specimen MNHN.F.B13442 from Solnhofen; E, F, Aeger insignis Oppel, 1862, specimen MNHN.GG.2004/57291 from Solnhofen; E, natural light; F, UV light. Scale bars: A, C, 1 cm; B, D, 2 cm; E, 3 cm. Abbreviations: a, branchiocardiac groove; b, antennal groove; b1, hepatic groove; e1e, cervical groove. Photographs: L. Cazes. Line drawing: G.P. Odin.