Gorispela cornubovis, 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 : 58

Gorispela cornubovis n. sp.

Figs. 3a, a 1

Diagnosis. Shell dicyrtid and very short with blunt apex and long, very divergent and apically curved apical and ventral horns resembling the horns of an ox. Cephalis smooth-surfaced, with blunt and imperforate apex, its distal part, at the contact with the thorax, with sparse and very small pores. Initial spicule without dorsal ray. Primary and secondary lateral rays not extend outside. Apical and ventral spines very divergent, practically symmetrical and extended outside into two long and curved horns. Both horns hollow and straight on their proximal halves, then curved in apical direction and three-bladed, with an apically directed blade and two laterally directed blades. At the base of the laterally directed blades a well visible spur or nudge is developed. Thorax very short and divided into two parts by a well-marked and thin protruding circumferential ring: a truncate cone-shaped proximal part with sparse and circular or oval pores of variable sizes and irregularly disposed, and a distal and very short cylindrical part with larger, circular or oval pores. Distal end irregularly terminated as if the skeleton was not yet finished.

Studied material. A single specimen in sample Rc4.

Holotype. The illustrated specimen, Rc4, coll. MGL.110272.

Dimensions. Length of shell without spines 73 µm, of cephalothorax 56 µm, of distal part of thorax 17 µm, of A and V horns 80 µm, diameter of cephalis 35 µm, of circular ring 62 µm, of distal cylindrical part of thorax 56 µm.

Etymology. From the Latin corn – horn and bos, bovis – ox, due to its resemblance with the horns of an ox.

Remarks. This species differs from all the other species of the genus Gorispela by having the A and V horns very divergent and curved in apical direction on their distal halves.

Stratigraphic range. Lower Ladinian (Fassanian), Recoaro, Vicentinian Alps, North Italy.

Figures

Fig. 3. a, a1. – Gorispela cornubovis n. sp., holotype in lateral and basal views, respectively, Rc4; b. – Gorispela fenestrata n. sp., holotype in lateral view, BV 85-70; c-e.– Gorispela hungarica n. sp., FÖ 87, e.– holotype. Scale bar of 50 µm is for all figures.

Fig. 1. Geological map of the locality Cristian area, Braşov Mountains, Romania, modified from the geological maps Zărneşti and Braşov sheets, scale 1:50000, Săndulescu et al. (1972).