Triadogigantocypris koninckiana ( Bosquet 1847 )

Kornicker, Louis S., Van, Barry W. M., Bakel, Fraaije, René H. B. & Jagt, John W. M., 2006, Revision of Mesozoic Myodocopina (Ostracoda) and a new genus and species, Mesoleberis hollandica, from the Upper Cretaceous of Belgium and The Netherlands, Zootaxa 1246, pp. 15-54 : 32-33

Triadogigantocypris koninckiana ( Bosquet 1847) (new combination)

Fig. 3 F–I

Cyprella koninckiana Bosquet 1847:373 , pl. 4: figs. 15a–c.—1854:125, pl. 9: figs. 12a–c.

Cypridina koninckiana ( Bosquet 1847) .— Jones 1849:3, 36 (list).—1898:342, pl. 17: fig. 4.— Jones & Kirkby 1874:12.— Van Veen 1936:169, pl. 9: figs. 18–21.

Cypridina konincki ( Bosquet 1847) . — Staring 1860:362.— Ubaghs 1879:199.

Monopia koninckiana ( Bosquet 1847) . — Howe & Laurencich 1958:425.— Coryell 1963:583, 1034.

Not Cypridina koninckiana Bosquet 1847:368 , pl. 3: figs. 5a–f.

Holotype

?None selected.

Syntypes locality

Upper Cretaceous: Maastricht area (southern Limburg, The Netherlands).

Material

No material examined herein.

Diagnosis

Carapace dimensions: length 1.2 mm, height 0.7 mm. Carapace oval in lateral view with posterior margin projecting at midheight ( Fig. 3 F–I). Carapace with rostrum; ventral margin of rostrum forms obtuse angle with anterior edge of valve ventral to rostrum. Central adductor muscle scar area large and contains 2 rows of oblique scars ( Fig. 3 I). Surface of carapace with round pits.

Comparisons

The carapace of this species is more elongate than that of M. hollandica and has a pointed posterior process at midheight that is absent on the latter.

Remarks

Coryell (1963:1034) incorrectly referred specimens identified as Cypridella koninckiana Jones 1870 (Carboniferous) by Koken 1896:37, text­fig. 25: figs. 10,10a) to M. koninckiana ( Bosquet 1847) . Koken’s illustrated specimen has a large node on each valve that is absent on T. koninckiana (also see illustrations of species in Jones & Kirkby 1874: pl. III: figs. 14, 16, 17).

Figures

FIGURE 3. Triadogigantocypris balatonica Monostori 1991: A, left lateral view of carapace, length 12 mm; B, detail of central muscle scars from A. Triadogigantocypris donzei (Neale 1976): C, lateral view of male carapace, length 1.065 mm; D, lateral view of female carapace, length 1.117 mm; E, central adductor muscle scars, left valve. Triadogigantocypris koninckiana (Bosquet 1847): F, G, I, lateral views of 3 right valves; H, lateral view, left valve. Triadogigantocypris ovulata (Bosquet 1847): J, left lateral view of carapace, length 1.4 mm. Triadogigantocypris limburgensis (Van Veen 1936): K, lateral view, right valve. Triadocypris spitzbergensis Weitschat 1983 a: L, lateral view of carapace, length 3.1 mm; M, central adductor muscle scars left valve. Size of specimens given if stated in original description.