Phillipsastrea sp.

Ma, Xue-Ping, Sun, Yuan-Lin, Hao, Wei-Cheng & Liao, Wei-Hua, 2002, Rugose corals and brachiopods across the Frasnian- Famennian boundary in central Hunan, South China, Acta Palaeontologica Polonica 47 (2), pp. 373-396 : 380

Phillipsastrea sp.

Fig. 7F, G .

Material.— One specimen.

Remarks.—The specimen is cerioid–astreoid in form with 10 to 12 major and minor septa respectively, both commonly dilated, but discontinuously so as to give a feeble carina appearance. The major septa are weak in the tabularium. The boundary between individual corallites is relatively distinct, characterized either by traces of thin epitheca or by contact of septa of neighboring corallites. The tabularium is 2–2.5 mm wide, commonly with incomplete tabulae. Horse−shoe dissepiments are not developed.

This form is different from Hunan specimens of Phillipsastrea nevadensis in that the latter species possesses horse−shoe dissepiments and strongly dilated septa at outer margin of the tabularium and has no boundary epitheca between neighboring corallites. It is similar to P. hunanensis Jiang, 1982 , but the latter species has more septa (13 to 17 major and minor septa respectively) and intermittent horse−shoe dissepiments.

Occurrence.—Central Hunan at the Chongshanpu section; latest Frasnian.

Figures

Fig. 7. Latest Frasnian (upper part of the Pa. linguiformis Zone) rugose corals from central Hunan. A, B. Disphyllum cf. cylindricum Sun, 1955, longitudinal and transverse sections, PUM 93593, sample L5/0.3−0.4; A × 3.8, B × 3.2. C, I. Frechastraea? hsikuangshanensis Ma, 1994., sample L5/0.85, longitudinal (× 3.6) and transverse (× 2.65) sections of the holotype specimen, PUM 93602. D, E. Phillipsastrea nevadensis Stumm, 1940, transverse and longitudinal sections of specimen PUM 93606, bed T3 of the Chongshanpu Section (see Ma 1998 for stratigraphy); × 5.5. F, G. Phillipsastrea sp., longitudinal and transverse sections, PUM 93606, bed T3; × 5.5. H. Disphyllum dupliforme Kong, 1978, transverse section, PUM 93592, from the top of the Frasnian of Taotang, about 2 km north of the Xikuangshan section (see Fig. 8L for longitudinal section); × 2.3.