Charlottea elegantissima 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 : 514-516

Charlottea elegantissima Tekin , n. sp. ( Fig. 9 J-L)

urn:lsid:zoobank.org:act:55CA8859-77C0-445D-81BF-D961D20F6D64

HOLOTYPE. — Sample Orbuk-32, HU.JMB.0139 ( Fig. 9J ).

PARATYPES. — HU.JMB.0140 ( Fig. 9K ), HU.JMB.0141 ( Fig. 9L ).

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

ETYMOLOGY. — From the Latin elegantissima , most elegant, due its elegant test.

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

DIMENSIONS (based on three specimens, in µm). — Maximum diameter of cortical shell: 80-100 (holotype: 80, average: 90); Maximum length of spine: 80-100 (holotype: 90, average: 90).

DESCRIPTION

Test small, slightly inflated globular with three primary spines. Cortical shell with small to medium sized, trigonal to tetragonal pore frames with subcircular nodes at pore frame vertices. Primary spines thin, needle-like throughout their length, subcircular in transversal section, tapering gradually to the distal end. Length of primary spines approximately equal to the diameter of the cortical shell.

REMARKS

This species differs from Charlottea johnsoni ( Carter et al. 1998: 38-39, pl. 3, figs 5, 10, 13, 14) by having a smaller test with needle-like primary spines throughout their length.

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.