Maja orbignyana Millet de la Turtaudière, 1865

Ossó, Àlex & Gagnaison, Cyril, 2019, An appraisal of the Middle-Late Miocene fossil decapod crustaceans of the ‘ Faluns’ (Anjou-Touraine, France), Geodiversitas 41 (9), pp. 367-383 : 373

publication ID	https://doi.org/10.5252/geodiversitas2019v41a9
publication LSID	urn:lsid:zoobank.org:pub:32E3623C-C47B-4D42-B2EB-E2594D031349
DOI	https://doi.org/10.5281/zenodo.3705478
persistent identifier	https://treatment.plazi.org/id/03D187F1-907E-FFB2-FF28-98800F504565
treatment provided by	Valdenar (2020-03-06 17:21:09, last updated 2024-11-27 18:54:43)
scientific name	Maja orbignyana Millet de la Turtaudière, 1865
status

Treatment

Maja orbignyana Millet de la Turtaudière, 1865 View in CoL ( Fig. 4 View FIG A-F)

Maia orbignyana Millet de la Turtaudière, 1865: 577 View in CoL . — Millet 1854: 152 (nomen nudum). — Couffon 1934: 171, fig. 155.

Maja orbignyana View in CoL – Couffon 1908: 2, 3, pl. 1, figs 1-4. — Glaessner 1929: 247.

Maja View in CoL orbigniana – Couffon 1910: 130, fig. 4. — Schweitzer et al. 2010: 95.

Maia sp. – Via 1932: 9.

Maia cfr. orbingyana – Vía 1941: 118, 119, pl. 10, fig. 70.

Maja View in CoL cf. orbigniana – Müller 1993: 13, fig. 6E.

MATERIAL EXAMINED AND MEASUREMENTS (in mm). — One fragment of anterior part of carapace preserving left rostral spine, left orbit and protogastric lobe, MS2012 0 172a: L = 26.3; W = 21. — Three fragments of left orbital region, ULB-SO-3: L = 9.5, W = 16; ULB-SO-3: L = 17, W = 11; ULB-SO-2: L = 19, W = 14.5. — Merus of ambulatory leg ULB-SO-4: L = 23; W = 5. — Dactylus of ambulatory leg ULB-SO-5: L = 21; W = 4.

LOCALITY AND HORIZON. — ‘La Sonneterie’ quarry, Meigné-le- Vicomte (Maine-et-Loire). ‘Savignean facies’, Langhian-Serravallian (Middle Miocene).

DESCRIPTION

Rostrum bifid with long, conical and acute rostral spines. Orbits shallow, rounded, opened; supraorbital margin with medial, flattened, acute subtriangular tooth, bounded by two fissures, the outer one deepest; outer orbital tooth long, conical, acute, slightly upward directed; inner orbital tooth subtriangular, acute; infraorbital margin with a blunt, prominent inner tooth, separated from the outer lateral orbit margin by a deep fissure. Protogastric region strongly swollen, ornate with strong and raised rounded tubercles. Hepatic region slightly swollen, ornate with rounded granules, the biggest ones at the basis of the hepatic spine, which is conical, acute and laterally directed. Merus of ambulatory leg subcircular in cross section, slightly compressed laterally; dactylus of ambulatory leg conical, subcircular in proximal cross section, slightly compressed distally.

REMARKS

The recovered specimens are fragmentary portions of the left anterior parts of several carapaces (mainly orbits and front). After comparison with images of the holotype ( Couffon 1908: figs 1, 2, 4; 1934: pl. 1, fig. 155), and of the fragmentary left orbit figured there ( Couffon 1908: pl. 1, fig. 3), it is clear that the recovered remains can be attributed to M. orbignyana with confidence. The strong, rounded and raised tubercles in the protogastric lobe and hepatic region are distinctive for the species (see Müller 1993: 13).

References

COUFFON O. 1908. - Sur quelques crustaces des faluns de Touraine et d'Anjou suivi d'un essai de Prodrome des Crustaces podophthalmaires miocenes. La Feuille des jeunes Naturalistes 39: 1 - 40. https: // biodiversitylibrary. org / page / 43027551

COUFFON O. 1910. - MaIa Orbigniana Millet, in Palaeontologia Universalis. Laval, France, 140 p.

COUFFON O. 1934. - Precis de Geologie angevine. Imprimerie Centrale, Angers, 195 p.

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

MILLET P. A. 1854. - Paleontologie de Maine et Loire. Cosnier et Lachese, Angers, 187 p. https: // doi. org / 10.5962 / bhl. title. 15140

MILLET DE LA TURTAUDIERE P. A. 1865. - Paleontographie ou Description des fossiles nouveaux du terrain tertiaire marin ou terrain miocene superieur du departement de Maine-et-Loire (Supplement). Indicateur de Maine et Loire. Cosnier et Lachese, Angers, vol. 2, 616 p.

MULLER P. 1993. - Neogene decapod crustaceans from Catalonia. Scripta Musei Geologici Seminarii Barcinonensis 225: 1 - 39.

SCHWEITZER C. E., FELDMANN R. M., GARASSINO A., KARASAWA H. & SCHWEIGERT G. 2010. - Systematic list of fossil decapod crustacean species. Crustaceana Monograph 10: 1 - 1222. https: // doi. org / 10.1163 / ej. 9789004178915. i- 222

VIA L. 1932. - Els crancs fossils del Terciari de Catalunya. Butlleti de la Institucio Catalana d'Historia Natural 32 (4): 131 - 146.

VIA L. 1941. - Los cangrejos fosiles de Cataluna. Boletin del Instituto Geologico y Minero de Espana 55: 3 - 73.

Figures

FIG. 4. — A-F, Maja orbignyana Millet de la Turtaudière, 1865: A, ULB-SO-2, frontal view of left orbit; B, MS2012 0 172a, dorsal view of anterior part of carapace; C, ULB-SO-3, frontal view of left orbit; D, ULB-SO-3, frontal view of left orbit; E, ULB-SO-4, merus of ambulatory leg; F, ULB-SO-5, dactylus of ambulatory leg; G-L, Pilumnus mediterraneus (Lőrenthey, 1897): G, ULB-SO-6, dorsal view; H, frontal view; I, MS2012 0 170,frontal view; J, dorsal view; K, ULB-SO-7,left chela; L, ULB-SO-8, left chela. Scale bars: 10 mm. Photographs by À. Ossó.