Humerocyrtis, 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 : 67

Humerocyrtis n. sp.

Fig. 7

Remarks. This new species, of which I have only the SEM image of a specimen from a residue of the sample Rc4 offered in 1975 to Emil Pessagno jr. during the 14 th European Micropaleontological Colloquium held in Romania, and illustrated by him later. This image shows very clearly the thorax with the circumferential ridge of the shoulder, the six rows of pores of the distal part of thorax, its concave outline, the proximal part of thorax and cephalis. Unfortunately, the details of the cephalic surface and its morphology are blur. What one can see is that the colar boundary is well marked and the apical horn is three-bladed but the ventral spine is invisible. One can also see that the proximal part of the thorax has pores arranged in circumferential rows as its distal part, a character that is not seen at other species of this genus, and also that the distal border of the thorax has a well-marked broad platy ring.

Studied material and Stratigraphic range. Sample Rc4,

Figures

Fig. 7. - Humerocyrtis n. sp., H – shoulder, Rc4.