Praeudalia rhaetica 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 : 509

Praeudalia rhaetica Tekin , n. gen., n. sp. ( Fig. 7 A-D)

urn:lsid:zoobank.org:act:018D810C-5979-4B09-AE11-9E56620CF889

Spumellaria gen. and sp. indet. B – Carter 1993: 92, pl. 13, figs 6, 8, 11. — Baumgartner et al. 2008: pl. 3, fig. 11.

Spumellaria gen. and sp. indet. A – Tekin 1999: 124, pl. 23, fig. 7.

HOLOTYPE. — Sample Orbuk-15, HU.JMB.0114 ( Fig. 7A ).

PARATYPES. — HU.JMB.0115 ( Fig. 7B ), HU.JMB.0116 ( Fig. 7C ), HU.JMB.0117 ( Fig. 7D ).

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

ETYMOLOGY. — Because of its occurrence in Rhaetian strata.

OCCURRENCE. — Upper Triassic , Rhaetian of Queen Charlotte Islands, British Columbia, Canada ; El Castillo Mélange, Nicaragua / Costa Rica Border ; Antalya Nappes, NE of Antalya city and Mersin Mélange, NW of Mersin city, southern Turkey .

DIMENSIONS (based on four specimens, in µm). — Maximum diameter of the cortical shell: 88-110 (holotype: 100, average: 98.5); Length of longest spine: 70-78 (holotype: 70, average: 74.3).

DESCRIPTION

Same as of the genus. Cortical shell disc-shaped, large, wider than the length of four spines.

REMARKS

Same as for the genus. This species differs from another species of Praeudalia Tekin , n. gen., illustrated as Gen. et sp. indet. in Tekin (2002b: 428, pl. 3, fig. 12) by possessing a smaller cortical shell and longer primary spines.

Figures

FIG. 7. — Photomicrographs of the radiolarians from the Orbuklukeli section:A-D, Praeudalia rhaeticaTekin, n. gen.,n. sp.; A, Holotype,Orbuk-15;B-D, Paratypes, Orbuk-15; E, Udalia dennisoni Whalen & Carter in Carter, Whalen & Guex, 1998, Orbuk-32; F-G, Udalia infrequens Tekin, n. sp.; F, Holotype, Orbuk-36; G, Paratype, Orbuk-36; H-J, Udalia primaeva Whalen & Carter in Carter, Whalen & Guex, 1998, Orbuk-27; K-M, Thurstonia gibsoni Whalen & Carter in Carter, Whalen & Guex, 1998, Orbuk-26; N, Thurstonia minutaglobus Whalen & Carter in Carter, Whalen & Guex, 1998, Orbuk-32; O, Thurstonia timberensis Whalen & Carter in