Cycleryon propinquus (von Schlotheim, 1822)

Charbonnier, Sylvain & Garassino, Alessandro, 2012, The marine arthropods from the Solnhofen Lithographic Limestones (Late Jurassic, Germany) in the collections of the Muséum national d’Histoire naturelle, Paris, Geodiversitas 34 (4), pp. 857-871 : 866-867

publication ID	https://doi.org/ 10.5252/g2012n4a8
persistent identifier	https://treatment.plazi.org/id/A70587E8-FFBB-FC38-0D99-8F49DE8A05F7
treatment provided by	Marcus
scientific name	Cycleryon propinquus (von Schlotheim, 1822)
status

Treatment

Cycleryon propinquus (von Schlotheim, 1822) ( Fig. 5A, B View FIG )

STUDIED MATERIAL. — 2 specimens from Solnhofen ( MNHN.F.B13436; MNHN.F.A42006) ; 2 specimens from Eichstätt ( MNHN.F. A33518 View Materials , A33543 View Materials ) ; 1specimen from an unknown locality ( MNHN.GG.2004/8071). Collections A. Milne Edwards, de Drée .

COMMENTS

Four species of Cycleryon are known at present in the Solnhofen Lithographic Limestones, C. propinquus , C. orbiculatus (Münster, 1839) , C. elongatus (Münster, 1839) and C. wulfi Garassino & Schweigert, 2004 . The studied specimens have been assigned to the type species for the spiny lateral margins, the two weak and tuberculate branchial carinae and the strongly tuberculate median postcervical carina. The type species differs from C. orbiculatus not having dorsal carinae, from C. elongatus having partially spiny lateral margins and from C. wulfi having unique spiny frontal margin. Moreover, we illustrate the first pereiopod of C. spinimanus (Germar, 1827) considered by Schweigert (2001b) as the female of C. propinquus (MNHN.F.A42006), usually rare in the Solnhofen Lithographic Limestones ( Fig. 5B View FIG ).

Cycleryon orbiculatus (Münster, 1839) ( Fig. 5C View FIG )

STUDIED MATERIAL. — 1 specimen from Solnhofen (MNHN.F.B13434). Collection A. Milne Edwards.

COMMENTS

The lack of dorsal carinae on the cephalothorax and the smooth frontal margin allows ascribing the specimen to C. orbiculatus . This species is relatively rare in the Solnhofen Lithographic Limestones (see Garassino & Schweigert 2006).