Canoptum productum Tekin, n. sp.

(Fig. 11 R-U)

urn:lsid:zoobank.org:act: 4E402E3A-79F5-405C-AB7F-EB5F656496A0

HOLOTYPE. — Sample Orbuk-15, HU.JMB.0150 (Fig. 11R).

PARATYPES. — HU.JMB.0151 (Fig. 11S), HU.JMB52 (Fig. 11T), HU.JMB.0153 (Fig. 11U).

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

ETYMOLOGY. — From the Latin productum, lengthened, long, due its long test.

OCCURRENCE. — Late Triassic, Rhaetian, Orbuklukeli section, Mersin Mélange, NW of Mersin city, southern Turkey.

DIMENSIONS (based on four specimens, in µm). — Maximum length of test: 170-220 (holotype: 220, average: 190); Maximum width of test: 80-100 (holotype: 100, average: 89.3).

DESCRIPTION

Test long, slender, very slowly incerasing in width and height distally with six post-abdominal segments. Cephalothorax dome-shaped, probably without horn, poreless, collar stricture indistinct. Lumbar stricture and other strictures prominent, marked by relatively deep depressions and mainly poreless. Abdomen to post-abdominal segments hoop-like, mainly covered by veneer of thick, microgranular silica with scattered, small, subcircular pores. Two rows of pores (15-16 pores at one row on half a circumference) can be seen just above and below septa located at strictures when silica accumulation is not prominent. REMARKS

This species differs from Canoptum merum (Pessagno &Whalen 1982: 124, pl. 1, figs 1, 15, 16, 20; pl. 12, fig. 11) by a having a more slender test covered by prominent silica accumulation, fewer scattered pores and abdomen to last post-abdominal segments hoop-like instead of trapezoidal in outline.