Poculinapora marsupiala, Dumitrica & Zügel, 2003

Dumitrica, Paulian & Zügel, Peter, 2003, Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany), Geodiversitas 25 (1), pp. 5-72 : 66

Poculinapora marsupiala n. sp. ( Figs 30D, E ; 32F )

HOLOTYPE. — Photo No. 58165; stub Mue 22/20; Musée de Géologie , Lausanne, No. 74421 ( Fig. 30D ) . PARATYPES. — MNHN, bât. de Géologie, No. Gg 2001/2115-2116.

ETYMOLOGY. — From the Latin marsupialis : marsupial.

MATERIAL EXAMINED. — Six specimens from the type horizon (sample Mue 22).

DIMENSIONS ( IN µM). — Total length of test 290-345 (av. 320), length of apical horn 80-100 (av. 90), of cephalis 25-40 (av. 35), of thorax 55-61 (av. 59), of feet 130-160 (av. 145), total width 140-195 (av. 165), width of cephalis 37-40 (av. 39), of thorax 90-100 (av. 95).

DESCRIPTION

Cephalis small, globular, practically imperforate and slightly pustulate. Apical horn long, slightly curved dorsally. Dorsal blade of horn well marked, separated from the other two blades by two deep grooves. These blades are free in the distal half and connected in the proximal half around the groove forming a tube. Distal part of the tube obliquely cut. Thorax hemispherical, thickwalled, well separated from cephalis, with three or four transverse rows of pores on the inflate part. Pores arranged especially in square pattern and decreasing in size apically. Thoracic velum thinwalled, short, partly preserved, uniting laterally the feet in their proximal part. Feet long, slightly curved and slightly divergent. Lateral blades of feet with subparallel borders or even slightly broader distally. External blade tapering distally.

REMARKS

Poculinapora marsupiala n. gen., n. sp. is well distinguished by its dorsally curved and obliquely cut apical horn.

Figures

FIG. 30. — A, B, Napora timida n. sp.; A, holotype, view from Lr; B, paratype, view from Lr; C, Poculinapora tripartita n. gen., n. sp., holotype, view from Lr; D, E, Poculinapora marsupialia n. gen., n. sp; D, holotype, view from Ll; E, paratype, dorsal view; F-I, Poculinapora poculigera n. gen., n. sp.; F, I, holotype, view from Lr and detail of apical horn; G, H, paratype, view from Lr and detail of apical horn in subapical view. Abbreviations: Ll, left primary lateral spine; Lr, right primary lateral spine. Scale bars: A-G, 100 µm; H, 30 µm; I, 10 µm.

FIG. 32. — Apical horns of Poculinapora n. gen.; A, P. espinosa n. comb., right lateral view; B, P. tripartita n. gen., n. sp., holotype, right lateral view; C, E, P. spathulipes n. gen., n. sp., holotype and paratype in left lateral and right lateral views respectively; D, P. poculigera n. gen., n. sp., paratype, left lateral view; F, P. marsupiala n. gen., n. sp., paratype, left lateral view. All arrows point to the opening of the tube along the apical horn. Scale bar: 0.1 mm.