Disphyllum dupliforme Kong, 1978

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 : 379-380

Disphyllum dupliforme Kong, 1978

Figs. 7H , 8L .

Disphyllum dupliforme Kong , n. sp.; Kong and Huang 1978: 72, pl. 23: 9a, b.

Material.—Over 20 specimens.

Remarks.—Our specimens have the following characters: Phacelloid to massive−phacelloid; individual cylindrical, generally 7 mm in diameter, commonly connected laterally; there are 17–20 major septa which almost reach the center; the minor septa are 1/3 to 1/2 length of the major; septa in some individuals are weakly to strongly thickened; in longitudinal section there are generally only one row of dissepiments with their top being convex; a discontinuous inner wall is present between the dissepimentarium and the tabularium; tabularium wide, tabulae generally incomplete, rarely complete.

The above features are about the same as those of the original material from Guizhou Province ( Kong and Huang 1978).

Occurrence.—Dushan in southern Guizhou Province; in central Hunan Province this form is abundant and widely distributed, e.g., in the Chongshanpu, Daping, and Xikuangshan sections. All these occurrences are of Frasnian age.

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.

Fig. 8. Latest Frasnian (upper part of the Pa. linguiformis Zone) rugose corals from central Hunan.A, B. Peneckiella shawoziensis He, 1978. Transverse and longitudinal sections, specimen PUM 93595, sample L5/top0.2 (upper 20 cm of bed L5; × 6). C, D. Temnophyllum sp. Longitudinal and transverse sections, PUM 93594, sample L5/top0.2; × 4. E–G, I. Sinodisphyllum variable Sun, 1958. E, F. Transverse and longitudinal sections, PUM 93600, bed T3 of the Chongshanpu section; × 2.3. G. Transverse section, PUM 00072, bed T3, × 2.3. I. Longitudinal section, PUM 93596, sample L5/top0.2, × 2.3. H. Sinodisphyllum simplex Sun, 1958. Longitudinal section, PUM 93601, bed T3, × 2.3. J, K. Sinodisphyllum litvinovitshae (Soshkina, 1949) from the top of the Frasnian of Taotang, about 2 km north of the Xikuangshan section. J. Longitudinal section, PUM 00073, × 2.3. K. Transverse section, PUM 93599, × 2.3. L. Disphyllum dupliforme Kong, 1978, longitudinal section, PUM 93592, same specimen as Fig. 7H, × 4.