Paurinella liassica 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 : 513

Paurinella liassica Tekin , n. sp.

( Fig. 8 I-O)

urn:lsid:zoobank.org:act:62CCD5EC-6714-425C-B8C7-F7C389C050C5

HOLOTYPE. — Sample Orbuk-27, HU.JMB.0120 ( Fig. 8I ) .

PARATYPES. — HU.JMB.0121 ( Fig. 8J ), HU.JMB.0122 ( Fig. 8K ), HU.JMB.0123 ( Fig. 8L ), HU.JMB.0124 ( Fig. 8M ), HU.JMB.0125 ( Fig. 8N ), HU.JMB.0126 ( Fig. 8O ).

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

ETYMOLOGY. — Due to its occurrence in Liassic strata.

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

DIMENSIONS (based on seven specimens, in µm). — Maximum diameter of test: 114-140 (holotype: 138, average: 131.9); Length of the longest spine: 81-120 (holotype: 100, average: 105).

DESCRIPTION

Shell subsphaerical to subtriangular with slightly inflated outline, convex sides and three primary spines. Shell spongy consisting of numerous concentric layers and many small, polygonal pore frames with subcircular pores. Primary spines long, usually one of them longer than two others, needle-like, tapering gradually distally and terminated with pointed ends. Length of primary spines about equal to diameter of shell or slightly shorter.

REMARKS

This species differs from theTriassic species Paurinella latispinosa Kozur & Mostler (1994: 73 , pl. 15, fig. 4) by having distally tapering primary spines instead of medially expanded ones.

Figures

FIG. 8. — Photomicrographs of the radiolarians from the Orbuklukeli section; A-H, Acanthotetrapaurinella kennecottensis (Carter in Longridge, Carter, Smith & Tipper, 2007); A-E, G, Orbuk-26, F, H, Orbuk-27; I-O, Paurinella liassica Tekin, n. sp.; I, Holotype, Orbuk-27; J-O, Paratypes; J, N, Orbuk-27; K-M, Orbuk-32; O, Orbuk-26; P-V, Tetrapaurinella sphaerica Tekin, n. sp.; P, Holotype, Orbuk-32; Q-V, Paratypes; Q, Orbuk-32; R-T, Orbuk-27, U, Orbuk-26; V, Orbuk-31; W-Y, Orbiculiformella callosa (Yeh, 1987); W, X, Orbuk-36; Y, Orbuk-41. Scale bar: G-H, 100 µm; A-F, I-V, 150 µm; W-Y, 200 µm.