Farcus, Pessagno, Whalen & Yeh, 1986

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 : 526

Farcus sp. B

( Fig. 12V )

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

DESCRIPTION

Tets long, dicyrtid with hemisphaerical cephalis. Cephalis mainly poreless/with rare pores and a long, needle-like, distally tapering horn. Collar stricture marked by a slight depression. Thorax truncated pyramidal in outline with scattered, subcircular pores, in some cases pores aligned in vertical rows. Thorax terminated in a short tube with scattered and subcircular pores. Four feet long, needle-like and decreasing in width distally.

REMARKS

This specimen differs from Farcus priscus Yeh & Cheng (1998: 24 , pl. 5, figs 1, 6, 12) by possessing a long, pyramidal test, few pores at the surface of thorax, longer, prominent tube at the end of thorax and longer feet.

Figures

FIG. 12. — Photomicrographs of the radiolarians from the Orbuklukeli section; A, B, Canoptum rhaeticum Kozur & Mostler,1981, Orbuk-15;C, Canoptum striatum (Kozur & Mostler, 1990), Orbuk-27; D-J, Laxtorum breve Tekin, n. sp.; D, Holotype, Orbuk-32; E-J, Paratypes, Orbuk-32; K-L, Laxtorum obscurum Tekin, n. sp., K, Holotype, Orbuk-27; L, Paratype, Orbuk-27; M-N, Atalantria emmela (Cordey & Carter, 1996), Orbuk-32; O, Atalantria sp. A, Orbuk-27; P-Q, Pseudoeucyrtis