CATALOG OF ORIGINAL DESCRIPTIONS: Lophocyrtis pseudojacchia Nishimura 1992
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Original Description Shell of three segments; cephalis small subspherical, thick-walled, with small pores with pore frames, bearing a rather long, stout and rod-like apical horn. Collar stricture with four collar pores internally, well defined externally. Cephalic structure has A, V, MB, two L and D; V rises upward at a high angle, two l are incorporated into the septal ring and the two L and D are not connected to the terminal feet. Thorax subhemispherical, pores frequently with hexagonal frames. The surface slightly roughened with pointed nodes, often bearing very short conical lateral wings. Abdomen pyramidal, rather thin-walled, with irregularly arranged circular pores larger than those of thorax. From the abdomen extend three solid cylindrical, conical lateral feet; termination ragged. Size: (Based on 15 specimens) Overall height 100-140 µ, height of cephalis and thorax 54-66 µ, maximum width of thorax 54-66 µ and of cephalis 28-30 µ. Etymology: pseudois derived from the Latin, meaning false. Extra details from original publication Distinguishing characters: This species seems to be similar to Lophocyrtis jacchia (Ehrenberg, in Sanfilippo 1990, p. 302, pl. 1, figs. 5-10; pl. 3, fig. 6), but is distinguished from the latter by having a short abdomen with a triangular aperture and having a simple cylindrical horn. It differs from Phormocyrtis striata praexquisita, n. sp. in the latter having indistinct lateral ribs and pores tending to become longitudinal on the abdomen.
References:
Nishimura, A. (1992). Paleocene radiolarian biostratigraphy in the northeast Atlantic at Site 384, Leg 43, of the Deep Sea Drilling Project. Micropaleontology. 38(4): 317-362. gs
Lophocyrtis pseudojacchia compiled by the radiolaria@mikrotax project teamviewed: 18-7-2025
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Lophocyrtis_ pseudojacchia Nishimura 1992.jpg
Lophocyrtis_ pseudojacchia Nishimura 1992.jpg
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