Eryma Meyer, 1840

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 : 652

publication ID	https://doi.org/10.5252/geodiversitas2019v41a17
publication LSID	urn:lsid:zoobank.org:pub:541CF827-F02E-4086-8FB0-2C0033DD429A
DOI	https://doi.org/10.5281/zenodo.3703584
persistent identifier	https://treatment.plazi.org/id/03C23C58-FFE7-FFDB-1B35-83B3FAEEF8A7
treatment provided by	Valdenar (2020-03-03 13:21:37, last updated 2024-11-29 12:25:38)
scientific name	Eryma Meyer, 1840
status

Treatment

Genus Eryma Meyer, 1840

TYPE SPECIES. — Macrourites modestiformis Schlotheim, 1822, by subsequent designation of Glaessner(1929).

Eryma modestiforme ( Schlotheim, 1822) ( Fig. 6 View FIG )

STUDIED MATERIAL. — Charbonnier & Garassino (2012) listed eight specimens: six specimens coming from Solnhofen (MNHN.F.A33507, B13448, B13450, B13452, B13463, MNHN.GG.2004/7462), one specimen from Eichstätt (B13446) and one specimen from an unknown locality (MNHN.GG.2004/8078-7471). Only two of them were figured (MNHN.F.B13450 and B13446) ; we thus figure three other specimens ( MNHN.F.A33507, Fig. 6B; B View FIG 13452, Fig. 6E View FIG ; and B13463, Fig. 6A View FIG ) and add three new specimens, one specimen from Eichstätt ( MNHN.F.A32408, Fig. 6H View FIG ) ; one specimen from Painten ( MNHN.F.A70906, Fig. 6G View FIG ) and one specimen from an unknown locality ( MNHN.F.A70905, Fig. 6C View FIG ). Collections Boué, Schwarzchild, A. Milne-Edwards, Hoffstetter, Manchester Museum, Férussac, Sauzières .

COMMENTS

Eryma modestiforme and E. veltheimii ( Münster, 1839) are the two species encountered in the Solnhofen Lithographic Limestones, the former being the most common. E. modestiforme is known by numerous specimens, almost complete, stored notably in European palaeontological collections (e.g. Paris, Berlin, London, Brussels, Basel). Among the MNHN collection, four specimens clearly show the intercalated plate characteristic of the erymid lobsters: MNHN.F.A32408, A33507, A70905, B13463, B13450 ( Fig. 6 View FIG A-D, H; see also Charbonnier & Garassino 2012: fig. 3b). All the specimens exhibit a short P1 propodus with a dense ornamentation, allowing us to ascribe the fossils to the species E. modestiforme (the propodus is more elongate and smooth in E. veltheimii). Moreover, three specimens show additional characters, diagnostic of E. modestiforme : 1) on the specimens MNHN.F.A70905 ( Fig. 6C, D View FIG ) and B13452 ( Fig. 6E, F View FIG ), the carapace groove pattern, in particular the junction between the postcervical and the branchiocardiac grooves ( Devillez et al. 2016; Devillez & Charbonnier 2017), is easily identifiable; and 2) the morphology of the P1 chelae of the specimen MNHN.F.A32408 ( Fig. 6H View FIG ), shows a subrectangular propodus, thin fingers progressively narrowing to their distal extremity and without teeth on their occlusal margins.

The historical specimen MNHN.F.A32408, figured by Desmarest (1822: pl. 11, fig. 5), shows the typical mode of preservation and lithology of the Bavarian Lithographic Limestones ( Fig. 6H View FIG ) but the locality of this specimen may be misleading. Desmarest (1822: 136) refers to “Aichstedt”, which is also the locality indicated on the original label, while the locality “Aichtät” is specified on the specimen. In a letter about the Franconian geology to A. Brongniart, L. de Buch (1823) evokes the lithographic limestones exploited at “Eichstedt” and “Solenhofen”, in the Altmuhl valley. However, there is no locality spelled “Eichstedt” next to the Altmühl River (instead, Eichstedt (Altmark) is a city located approx. 80 km west to Berlin) but “Eichstätt”. Thus, the designations “Aichtät”, “Aichstedt” and “Eichstedt” in the mentioned publications are likely orthographic variations referring to the same locality, nowadays spelled Eichstätt.

References

BUCH DE L. 1823. - Lettre a M. Alex. Brongniart, etc., sur le gisement des couches calcaires a empreintes de poissons et sur les Dolomies de la Franconie, in AUDEBARD (baron d'), Bulletin general et universel des annonces et nouvelles scientifiques. Tome II. Order of the Trustees, Paris: 47, 48. https: // biodiversitylibrary. org / page / 4425334

CHARBONNIER S. & GARASSINO A. 2012. - The marine arthropods from the Solnhofen Lithographic Limestones (Late Jurassic, Germany) in the collections of the Museum national d'Histoire naturelle, Paris. Geodiversitas 34 (4): 857 - 872. https: // doi. org / 10.5252 / g 2012 n 4 a 8

DESMAREST A. - G. 1822. - Les crustaces proprement dits, in BRONGNIART A. & DESMAREST A. - G. (eds), Histoire naturelle des crustaces fossiles sous les rapports zoologiques et geologiques. F. - G. Levrault, Paris: 67 - 142. https: // biodiversitylibrary. org / page / 9656542

DEVILLEZ J., CHARBONNIER S., HYZNY M. & LEROY L. 2016. - Review of the Early Cretaceous erymid lobsters (Crustacea: Decapoda) from the Western Tethys. Geodiversitas 38 (4): 515 - 542. https: // doi. org / 10.5252 / g 2016 n 4 a 4

DEVILLEZ J. & CHARBONNIER S. 2017. - The genus Eryma Meyer, 1840 (Crustacea: Decapoda: Erymidae): new synonyms, systematic and stratigraphic implications. Bulletin de la Societe geologique de France 188 (3): art. 15. https: // doi. org / 10.1051 / bsgf / 2017178

GLAESSNER M. F. 1929. - Crustacea Decapoda, in POMPECKJ J. F. (ed.), Fossilium Catalogus, I: Animalia. W. Junk, Paris, 41: 1 - 464.

MUNSTER G. G. ZU 1839. - Decapoda Macroura, Abbildung und Beschreibung der fossilen langschwanzigen Krebse in den Kalkschiefern von Bayern. Commission der Buchner'schen Buchhandlung, Bayreuth: 1 - 88. https: // doi. org / 10.5962 / bhl. title. 120022

SCHLOTHEIM E. F. VON 1822. - Beitrage zur naheren Bestimmung der versteinerten und fossilen Krebsarten. Nachtrage zur Petrefaktenkunde, Becker, Gotha: 17 - 37.

Figures

FIG. 6. — Eryma modestiforme (Schlotheim, 1822) from the Late Jurassic Solnhofen Lithographic Limestones (Bavaria, Germany): A, specimen MNHN.F.B13463 from Solnhofen; B, specimen MNHN.F.A33507 from Solnhofen; C, D, specimen MNHN.F.A70905 (unknown locality): general view (C) and line drawing (D); E, F, specimen MNHN.F.B13452 from Solnhofen: general view (E) and line drawing of the carapace (F); G, specimen MNHN.F.A70906 from Painten; H, specimen MNHN.F.A32408 from Eichstätt.Scale bars:A-G,1 cm; H, 0.5 cm. Abbreviations: a, branchiocardiac groove;as, antennal spine; a2, antenna; b, antennal groove; b1, hepatic groove; c, postcervical groove; d, gastro-orbital groove; di, diaeresis; e1e, cervical groove; ip, intercalated plate; P1-P2, periopods 1-2. Preparation: Y. Despres (C). Photographs: C. Lemzaouda (A, B, E), L. Cazes (C, G, H). Line drawings: J. Devillez.