Praewaagenoconcha Sokolskaya, 1948

Baliński, Andrzej, 2002, Frasnian-Famennian brachiopod extinction and recovery in southern Poland, Acta Palaeontologica Polonica 47 (2), pp. 289-305 : 294

publication ID

https://doi.org/ 10.5281/zenodo.13304675

persistent identifier

https://treatment.plazi.org/id/A96687CB-2438-FFB0-FF89-FC6E038DF90A

treatment provided by

Felipe (2024-07-19 00:38:56, last updated 2024-08-12 11:49:52)

scientific name

Praewaagenoconcha Sokolskaya, 1948
status

 

Genus Praewaagenoconcha Sokolskaya, 1948 Praewaagenoconcha cf. speciosa ( Hall, 1867)

Fig. 3B–D View Fig .

Praewaagenoconcha cf. speciosa ( Hall, 1867) ; Baliński 1979: 31–32,

pl. 3: 3, 6.

Material.—31 fragmentary specimens from trench Z−17. This species is rare in the most of the trench Z−17 section although it is quite common in the upper part of the set II being one of the characteristic brachiopods of the assemblage of the Pampoecilorhynchus geniculatus interval.

Remarks.— Three specimens of the species reported in earlier studies were recovered from slightly younger strata of trench Z−16 and quarry Z−2 from the lower part of Pa. triangularis conodont Zone ( Baliński 1979). The present collection, although rather poorly preserved, includes numerous specimens. This species is closely similar to Productella speciosa Hall from the Chemung Group, USA ( Hall and Clarke 1892: pl. 17: 25, 26) in its general appearance. It has relatively fine spines, which occur on both valves. One specimen preserves ventral teeth and dorsal sockets. Aspine bearing median ridge, a feature common to members of Praewaagenoconcha , is not observed on the ventral valves of available specimens.

Balinski A. 1979. Brachiopods and conodonts from the Frasnian of the Debnikanticline, southernPoland. Palaeontologia Polonica 39: 1 - 95.

Hall, J. 1867. Descriptions and Figures of Fossil Brachiopoda of the Upper Helderburg, Hamilton, Portage and Chemung Groups. Natural History of New York, Palaeontology, vol. 4, part. 1. 428 pp. New York State Geological Survey. Albany.

Hall, J. and Clarke, J. M. 1892. An introduction to the study of the genera of Paleozoic Brachiopoda. Geological Survey of the State of New York, Paleontology 8: 1 - 394.

Sokolskaya, A. N. (Sokol'skaa, A. N.) 1948. Evolution of the genus Productella Hall and related forms in the Palaeozoic of the Moscow region [in Russian]. Trudy Paleontologiceskogo Instituta Akademii Nauk SSSR 14: 1 - 168.

Gallery Image

Fig. 3. Early Famennian brachiopods, trench Z−17, Dębnik anticline, Poland. A. Barroisella campbelli Cooper, 1942; partially exfoliated shell Bp 46/48a in dorsal view; × 3. B–D. Praewaaagenoconcha cf. speciosa (Hall, 1867). B. Exterior of the ventral valve Bp 46/20a. C, D. Internal view of two partially exfoliated dorsal valves Bp 46/25a and Bp 46/25b; × 1.5. E–G. Nigerinoplica sp. E, F. Side view of two shells Bp 46/24a and Bp 46/18a. G. Shell Bp 46/24b in dorsal view showing partially removed ventral valve and interior of the dorsal valve; × 1.5. H. Schizophoria (Schizophoria) sp.; incomplete shell Bp 46/37a in dorsal view; × 1.5. I. Rhipidomellid gen. et sp. indet; exterior of poorly preserved ventral valve Bp 46/40; × 2. J.?Ryssochonetes sp.; incomplete shell Bp 46/15 in ventral view; × 15. K. Longispina sp.; poorly preserved shell Bp 46/17z in ventral view; × 5.

Kingdom

Animalia

Phylum

Brachiopoda

Class

Strophomenata

Order

Productida

Family

Productellidae