Tozerium orbuklukeliense Tekin, 2020

Tekin, Kagan, Krystyn, Leopold, Okuyucu, Cengiz, Bedi, Yavuz & Sayit, Kaan, 2020, Late Triassic to Early Jurassic radiolarian, conodont and ammonite assemblages from the Tavuscayiri block, Mersin Mélange, southern Turkey: Time constraints for the T / J boundary and sedimentary evolution of the southern margin of the northern Neotethys, Geodiversitas 42 (27), pp. 493-537 : 516

Tozerium orbuklukeliense Tekin , n. sp. ( Fig. 9 P-R)

urn:lsid:zoobank.org:act:D0FD13C2-4B21-4640-9815-2297D5FFBEB3

HOLOTYPE. — Sample Orbuk-32, HU.JMB.0142 ( Fig. 9P ).

TYPE LOCALITY. — Orbuklukeli section, Mersin Mélange, NW of Mersin city, southern Turkey.

ETYMOLOGY. — Named after its type locality.

OCCURRENCE. — Lower Jurassic, lower Sinemurian of the Orbuklukeli section, Mersin Mélange, NW of Mersin city, southern Turkey.

PARATYPES. — HU.JMB.0143 ( Fig. 9Q ), HU.JMB.0144 ( Fig. 9R ).

DIMENSIONS (based on three specimens, in µm). — Maximum diameter of cortical shell: 110-128 (holotype: 110, average: 116); Maximum length of spine: 85-114 (holotype: 100, average: 99.6).

DESCRIPTION

Cortical shell small to medium-sized with four strong spines. Cortical shell sphaerical to subsphaerical composed of small to medium-sized polygonal (mainly trigonal to tetragonal) pore frames and large, subcircular pores at pore frame vertices. Spines prominent, robust, needle-like, subcircular in transversal section, decreasing in width gradually to its end. Length of spines approximately equal to diameter of cortical shell.

REMARKS

This species differs from Tozerium nascens ( Carter et al. 1998: 44, pl. 1, figs 1, 7, 8, 13, 14, 18, 23, 24) by having a sphaerical, smaller cortical shell with smaller pore frames, large nodes at pore frame vertices and prominent, robust and longer primary spines.

Figures

FIG. 9. — Photomicrographs of the radiolarians from the Orbuklukeli section: A-E, Orbiculiformella pulchra Tekin, n. sp.; A, Holotype, Orbuk-32; B-E, Paratypes; B, Orbuk-31; C-E, Orbuk-32; F-G, Orbiculiformella? trispina trispina (Yeh, 1987), Orbuk-32; H, Orbiculiformella sp. A, Orbuk-27; I, Danubea sp. A, Orbuk-27; J-L, Charlottea elegantissima Tekin, n. sp.; J, Orbuk-32, Holotype; K-L, Paratypes; K, Orbuk-27; L, Orbuk-32; M, N, Charlottea johnsoni Whalen & Carter in Carter, Whalen & Guex, 1998, Orbuk-32; O, Charlottea sp. A sensu Whalen & Carter (2002), Orbuk-41; P-R, Tozerium orbuklukeliense Tekin, n. sp.; P, Holotype, Orbuk-32; Q-R. Paratypes; Q, Orbuk-32; R, Orbuk-31; S-T, Tozerium sp. A; S, Orbuk-41; T, Orbuk-44; U, Ferresium sp. cf. F. teekwoonense Carter, 1993, Orbuk-15; V, Palaeosaturnalis blomei Kozur & Mostler, 1990, Orbuk-32; W, Palaeosaturnalis liassicus Kozur & Mostler, 1990, Orbuk-38; X, Palaeosaturnalis schaafi Kozur & Mostler, 1990, Orbuk-38; Y, Palaeosaturnalis subovalis Kozur & Mostler, 1990, Orbuk-38. Scale bar: A-E, 200 µm; F-H, 170 µm; I, 80 µm; J-L, P-R, 120 µm; M-O, S-U, 150 µm; W, X, 220 µm.