Humerocyrtis mediotriassica, Dumitrică, 2024

Dumitrică, Paulian, 2024, New Middle Triassic Bell-Shaped Nassellarian Radiolaria From Alpine And Carpathian Areas, Acta Palaeontologica Romaniae 20 (1), pp. 51-75 : 72-73

Humerocyrtis mediotriassica n. sp.

Figs. 10e, g

Diagnosis. Shell bell-shaped relatively large. Cephalis with sparse, small and irregularly disposed pores. Apical and ventral horns thin, conical, relatively long and equal in length, the former displaced toward the dorsal side of the cephalis and slightly curved towards the axis of shell. Collar boundary weakly marked outside but considered to be at the level of the median bar, which corresponds to the appearance of larger pores. Shoulder well marked by the first lateral enlargement of shell, followed by its contraction and again enlargement so that the outline of post-shoulder thorax is concave.

Studied material. Two specimens, one in the sample CR 25 and another one in Rc4.

Holotype. Fig. 10e , CR 25, coll. MGL.110299.

Paratype. Fig. 10g , Rc4, coll. MGL .110300.

Figures

Fig. 10. a – Humerocyrtis infinita n. sp, Rc4. b, d – Humerocyrtis brevithorax n. sp.: b – R78/1b, d – poorly preserved specimen, Rc4. c – Humerocyrtis asymmetrica n. sp., Rc4. f – Humerocyrtis marmoladensis n. sp., BV 85-70. e, g – Humerocyrtis mediotriassica n. sp.: e – CR25, g – Rc4. Scale bar of 50 µm is for all figures.