Rhombocladia punctata Dunaeva, 1961

Ernst, Andrej & Minwegen, Elke, 2006, Late Carboniferous bryozoans from La Hermida, Spain, Acta Palaeontologica Polonica 51 (3), pp. 569-588 : 584-585

publication ID	https://doi.org/10.5281/zenodo.13652021
DOI	https://doi.org/10.5281/zenodo.13652073
persistent identifier	https://treatment.plazi.org/id/92125B5E-240D-FF80-FC9A-64A876246B12
treatment provided by	Felipe (2024-08-08 18:32:10, last updated 2024-09-03 19:50:44)
scientific name	Rhombocladia punctata Dunaeva, 1961
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Rhombocladia punctata Dunaeva, 1961 View in CoL

Fig. 7D–H; Table 13.

1961 Rhombocladia punctata View in CoL sp. nov.; Dunaeva 1961: 40–41, pl. 5: 5–7, text−figs. 4, 5.

Material.— SMF 1755, 1760, 1793, 1794–1796 (and 17 additional fragments).

Description.—Dichotomously branching colonies. Branches 1.4–1.9 mm wide and 0.7–1.1 mm thick in their middle parts, lens−shaped in cross−section. Oval apertures arranged diagonally in 7 to 8 rows, 4.5 spaced in 2 mm of the branch length longitudinally and 7–8 diagonally. Autozooecial chambers long, bending gently to the colony surface, becoming rhombic in deeper tangential section, appearing rhombic to hexagonal in cross−section. Long superior hemisepta, curved proximally, positioned in distal parts of autozooecia; inferior hemisepta absent. Abundant microacanthostyles arranged irregularly between apertures, 0.02 mm in diameter. Walls 0.035 –0.040 mm thick in the endozone, 0.13–0.16 mm thick in the exozone. Heterozooecia absent.

Disscusion.—This species is similar to Rhombocladia multispinosa McKinney, 1972 from the Bangor Limestone (Chesterian) of North America. The latter species differs in having large single macroacanthostyles between the apertures.

Stratigraphic and geographic range.—Kasimovian Stage, Upper Carboniferous; Donetsk Basin, Ukraine. Picos de Europa Formation, Moscovian, Upper Carboniferous; La Hermida, Spain.

References

Ceretti, E. 1963. Briozoi carboniferi della Carnia. Giornale di Geologia, Annali del Museo Geologico di Bologna 30: 254 - 360.

Condra, G. E. 1902. New Bryozoa from the Coal Measures of Nebraska. The American Geologist 30: 337 - 358.

Dunaeva, N. N. 1961. Verhn'okam'anovigilni mohovatki zahidnoj casti Donec'kogo bassejnu. 142 pp. Izdelie Akademii Nauk Ukrainskoi SSR, Kiev.

Eichwald, E. 1860. Lethaea Rossica, ou Paleontologie de la Russie. I. Ancienne Periode, 355 - 419, 434 - 435, 450 - 452, 476 - 494. E. Schweizerbart, Stuttgart.

Ernst, A. 2005. Upper Palaeozoic Bryozoa of the Carnic Alps (a review). In: E. R Woss (ed.), Moostiere (Bryozoa), 69 - 74. Denisia, Biologiezentrum der Oberosterreichischen Landesmuseen, Linz.

McKinney, F. K. 1972. Nonfenestrate Ectoprocta (Bryozoa) of the Bangor Limestone (Chester) of Alabama. Geological Survey of Alabama Bulletin 98: 1 - 144.

Meek, F. B. 1872. Report on the paleontology of eastern Nebraska. In: F. V. Hayden (ed.), Final Report on the United State Geological Survey of Nebraska and Portions of Adjacent Territories 81 - 239. U. S. Government Printing Office, Washington.

Moore, R. C. 1929. A bryozoan faunule from the Upper Graham Formation, Pennsylvanian, of North Central Texas. Journal of Paleontology 3: 1 - 27, 121 - 156.

Morozova, I. P. 1955. Carboniferous bryozoans of the Middle Don [in Russian]. Trudy Paleontologickogo Instituta Akademii Nauk SSSR 58: 1 - 88.

Schulga-Nesterenko, M. I. [Sulga-Nesterenko, M. I.] 1955. Carboniferous Bryozoa of the Russian Platform [in Russian]. Trudy Paleontologiceskogo Instituta Akademii Nauk SSSR 57: 1 - 157.