Stemmatodus Heckel, 1854

Poyato-Ariza F. J. & Wenz S., 2002, A new insight into pycnodontiform fishes, Geodiversitas 24 (1), pp. 139-248 : 152

Genus Stemmatodus Heckel, 1854

TYPE SPECIES. — By original designation: Pycnodus rhombus Agassiz, 1839 . Early Cretaceous from Torre d’Orlando, Naples, Italy. Heckel (1854) created, with a description, the generic name Stemmatodus for Pycnodus rhombus Agassiz, 1839 , this species being explicitly designed by Heckel as “als Typus” ( Heckel 1854: 455). Holotype of Stemmatodus rhombus: Bohemian Museum Prague (fide Heckel 1854 and Woodward 1895a). Heckel (1854) included in his new genus Stemmatodus the holotype plus some additional specimens previously described by Costa (1850) as Pycnodus rhombus as well. The latter material (which, as figured by Costa 1850: pl. 4, fig. 8; pl. 5, fig. 1, does not present the features that currently characterize Stemmatodus ) would later become “ Coelodus ” costae , a species in need of revision. However, Heckel (1854: 457), when referring to the binomial species name, used the subsequent spelling rhomboides for the specific name. This is a demonstrably intentional emendation according to Art. 33.2.1 of the ICZN. Stemmatodus was later revisited and figured by Heckel (1856: pl. 2, figs 9-11), again with reference to Pycnodus rhombus , but using once more the subsequent spelling rhomboides. Later on, Woodward (1895a: 248) restored the original spelling rhombus , which is in prevailing usage since.

MATERIAL EXAMINED. — MNHN JRE 37, 38, 39, 40, 41, 42 (two specimens), 43 (two specimens), NHML 12001 (two specimens), 12002, 12003 (two specimens) 12004 (two specimens), P. 12006, 39775, 9672 (two specimens), 18600, 23152 (three specimens), 62200 (ex 1671), 1673, 43451 (two specimens), 45679 (two specimens), P. 1640 (all complete specimens).

Genus Stenamara Poyato-Ariza & Wenz, 2000 TYPE SPECIES. — By original designation: Stenamara mia Poyato-Ariza & Wenz, 2000. Upper Barremian from Las Hoyas, province of Cuenca, Spain. Holotype of Stenamara mia: MCCM LH-14365a-b. MATERIAL EXAMINED. — Holotype and only known specimen (complete, unsatisfactory preservation), plus silicone peels of both part and counterpart ( Fig. 3D ).

Figures

FIG. 3. — Forms previously referred to the genus Eomesodon Woodward, 1918; A, B, Apomesodon surgens n. gen., n. sp. Part and counterpart of the same specimen, currently housed in different collections; A, MNHN CRN 69; B, ML 15660. Photos Serrette, both under ultraviolet light; C, Apomesodon gibbosus n. comb., JM 4120. Photo courtesy G. Viohl; D, Stenamara mia Poyato-Ariza & Wenz, 2000, silicone cast of the holotype, LH – 14365. Photo Serrette, from Poyato-Ariza & Wenz (2000). Scale bars: A, B, D, 1 cm; C, 5 cm.