Leioproductus Stainbrook, 1947

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 : 384

Genus Leioproductus Stainbrook, 1947 Leioproductus hunanensis Liu, 1982

Fig. 9F–H .

Leioproductus hunanensis Liu (sp. nov.); Liu et al. 1982: 181–182,

pl. 130: 4.

Material.—About 200 specimens, most of which only partially preserved.

Remarks.—This species is very similar to species of Ardiviscus Lazarev, 1986 in shell size and strength of spines. Because the internal structure of the present species is not known (especially the presence or absence of cardinal process pit, which can be used to differentiate Leioproductus from Ardiviscus ) the Hunan species is retained in Leioproductus at present. Leioproductus hunanensis may be conspecific with Productella subaculeata mut. alpha Grabau (1931 –33: pl. 4: 9) from the Upper Devonian (early Famennian) Yaoso Group of South China.

Occurrence.—Qidong County of central Hunan; early Famennian ( Pa. triangularis through Pa. crepida zones).

Figures

Fig. 9. A, B. Rhyssochonetes? sp. 1, sample S−Y−2, ventral and dorsal views, PUM 00055; × 3. C–E, S. Rhyssochonetes? sp. 2, sample S−H−0. C. Ventral view, PUM 00062, × 3. D. Dorsal view showing the interarea, PUM 00048, × 5. E. Ventral view, note the orthomorph parallel arranged hinge spines (arrowed), PUM 00061b, × 3. S. Enlargement of arrowed area of E, × 11.5. F–H. Leioproductus hunanensis Liu, 1982, sample C−H, lateral, dorsal and ventral views, PUM 00031, × 2. I. Productella sp. 2, sample C1−0, dorsal view showing some spines present on the valve, PUM 00035, × 3. J, K. Productella lachrymosa var. asiatica Tien, 1938; sample C7. J. Ventral view, PUM 00002, × 1.5. K. Dorsal view, PUM 00032, × 2. L, M. Productella sp. 1, sample S−Y−4.L. Ventral view, PUM 00018, × 2. M. Dorsal view, PUM 00015, × 2. N–R. Praewaagenoconcha linglingensis (Wang, 1956), sample C−H. N. Dorsal view, PUM 00030, × 2. O. Dorsal view, PUM 00034, × 2. P, Q. Ventral and lateral views, PUM 00024; × 2. R. Dorsal interior showing the slit−like sockets, PUM 00059, × 3.3. T–V. Sinalosia rugosa gen. et sp. nov., sample S−Y−2. T. Showing the distinct interarea with ventral pseudodeltidium and dorsal chilidium, which is medially divided by cardinal process as to form a narrow V−shaped slit gap, PUM 01001, × 6. U, V. Lateral and internal views of cardinal process, PUM 01002; × 6.