Glyphea

Abstract: The report of decapod crustaceans from the "Hamada des Kem Kem" slope (SE Morocco) has previously been limited to only one report by Garassino et al. (2006). The recent disco- very of macrurans, anomurans, and brachyurans from a new quarry, located at the top of a small mesa called Gara Sbaa, increases the carcinologic knowledge from the Upper Cretaceous (Cenomanian- Turonian) of this area. The macruran specimens include Cretapenaeus berberus Garassino, Pasini & Dutheil, 2006 (Penaeidae Rafi nesque-Schmaltz, 1815) and Glyphea garasbaaensis n. sp. (Glypheidae Zittel, 1885). The anomuran specimens include Galathea sahariana n. sp., Paragalathea africana n. sp., and Cretagalathea exigua n. gen., n. sp. (Galatheidae Samouelle, 1819). The brachyuran speci- mens include Corazzatocarcinus cfr. C. hadjoulae (Roger, 1946) (Necrocarcinidae Forster, 1968) and Telamonocarcinus cfr. T. gambalatus Larghi, 2004 (Dorippidae MacLeay, 1838) recently described from the Upper Cretaceous (Cenomanian) of Lebanon.

Abstract: In this work that deepens the knowledge about the carcinologic fauna of the Cenomanian (Upper Cretaceous) of Lebanon, a small sample of decapod crustaceans, discovered in the Hakel and Hadjula outcrops, is described. The study of this sample has allowed the description of Phoenice pasinii n.gen.n.sp. (infraorder Stenopodidea Bate, 1888, family Stenopodidae Claus, 1872), Glyphea damesi n.sp. (infraorder Palinura Latreille, 1803, family Glypheidae Zittel, 1885), Jasus Parker, 1883 with J. sp. (infraorder Palinura Latreille, 1803,family Palinuridae Latreille, 1802) and Callianassa Leach, 1814 with C. sp. (infraorder Anomura H. Milne-Edwards, 1832, family Callianassidae Dana, 1852). Phoenice n.gen. represents the oldest genus of the infraorder Stenopodidea Bate, 1888 known to date, while Jasus Parker, 1883 represents the oldest report of this genus in the fossil record, known up to now only in the Oligocene of New Zealand.

Abstract: (1882). XIV.—Carcinological investigation on the genera Pemphix, Glyphea, and Araeosternus. Annals and Magazine of Natural History: Vol. 10, No. 56, pp. 133-149.

Abstract: Four species of decapod crustaceans from the Middle Jurassic Opalinus Clay (Aalenian) of Northern Switzerland are described. Of these, Mecochirus cf. eckerti is the most common one, while Eryma cf. bedelta, Glyphea sp. and Aeger sp. were present as individuals, or only a few specimens. The preservation of these crustaceans ranges from moderate to excellent, reflecting the favourable taphonomic conditions of the depositional environment. An interesting aspect of the taphocoenosis in the Opalinus Clay is that the decapod crustaceans are by far outnumbered by small peracarid crustaceans (isopods and tanaids). This is interpreted as reflecting the original differences in abundance. Yet this distribution is not frequently encountered in sedimentary sequences where decapods (although rare) are far more common than isopods and tanaids. In rare instances, this reflects the original predominance of decapods, more often it is a consequence of the differential taphonomic behaviour of these two groups. A new model relating the ecology to the taphonomic behaviour of decapod and peracarid crustaceans is proposed. According to this model, decapods dominate in settings that were deposited under extremely dysoxic (peracarids wiped out by seasonal anoxia) as well as under fully oxic conditions (peracarids destroyed by taphonomic processes). Only in muddy dysoxic depositional environments are peracarid crustaceans frequently preserved. In these settings with equal preservation potential of decapods and peracarids, the original composition of the crustacean fauna would show a predominance of peracarid crustaceans. Examples from some well known fossiliferous settings are provided to illustrate the use of the new model.