Polyphylloseris microkothos, Baron-Szabo, 2008

Baron-Szabo, Rosemarie C., 2008, Dendrophylliina, Caryophylliina, Fungiina, Microsolenina, and Stylinina, Zootaxa 1952, pp. 1-244 : 166-167

Polyphylloseris microkothos n. sp.

Pl. 15, figs 5a–c

Derivatio nominis. from Greek: micros= small, kothos =cup, referring to the small diameter of the corallite.

Holotype. J-66-19.

Dimensions. d= 2–4 mm; c-c=4–8.5 mm; s=16–30.

Diagnosis. Colonial, thamnasterioid to subplocoid; gemmation intracalicinal; corallites elevated, appearing mammelonate; costosepta confluent, nearly equal in thickness, regularly perforated, arranged in irregular systems, pennular laterally; columella spongy-trabecular or formed by twisted segments; synapticulae abundant; endothecal dissepiments vesicular to subtabulate, numerous.

Comparison. The new species differs from all known Cretaceous forms by the smaller corallite diameter and the smaller number of septa. In e.g. P. simondsi Wells, 1932 , from the Albian of Texas, the corallite diameter ranges from 3–5 mm and the number of septa varies from 40 to 50; in P. conophora ( Felix, 1891) from the Barremian of Mexico the number of septa can exceed 60; in P. convexa ( d'Orbigny, 1850) from the Hauterivian of France the number of septa is generally 76 and the diameter of the corallites ranges from 7–8 mm.

Distribution. Titanosarcolites- limestone at Jerusalem Mountain Inlier, Jamaica, Middle-Upper Maastrichtian.