Mackinneyella robustiformis
- 1. Institut für Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Str. 10, D- 24118 Kiel (Germany) ae @ gpi. uni-kiel. de
- 2. Institute of Paleontology, University of Erlangen-Nürnberg, Loewenichstr. 28, D- 91054 Erlangen (Germany) basendar @ pal. uni-erlangen. de
- 3. University of Esfahan, Faculty of Earth Sciences, Esfahan (Iran) hamedani _ ali @ hotmail. com
Description
Polypora robustiformis Morozova, 1965: 195, pl. 28, fig. 4; 1970a: 220, 221, pl. 5, fig. 2, text-fig. 40. — Xia 1986: 228, pl. 10, fig. 1.
Mackinneyella robustiformis – Morozova & Lisitsyn 1996: 45.
HOLOTYPE. — No. 1613/199, PIN; Transcaucasia (Nakhichevan); Gnishik Horizon, Middle Permian, Murgabian (= Wordian).
MATERIAL EXAMINED. — 4-18-2, 20-1, 24-5.
OCCURRENCE. — Transcaucasia (Nakhichevan); Gnishik Horizon, Middle Permian, Murgabian (= Wordian). Lakaftari: central Iran, Jamal Formation, Middle Permian.
DESCRIPTION
Micrometric formula: 6-10/4-6.5//16-18.5. Reticulated colonies with straight branches, joined by dissepiments. Bifurcation common. Autozooecia arranged in 4-5 alternating rows on branches, becoming 7-8 in the place of bifurcation. Apertures circular, arranged in regular alternating rows, spaced 4-5 per length of a fenestrule. Shape of fenestrules varying from oval to rectangular. Keels absent. Nodes small, regularly spaced on the obverse colony surface.Internal granular skeleton thick, well developed, continuous with nodes, peristome and across dissepiments. Outer lamellar skeleton moderately thick, containing abundant hyaline rods 5-10 µm in diameter. Microacanthostyles moderately abundant, having distinct hyaline cores and dark laminated sheaths, 10-15 µm in diameter.
INTERIOR DESCRIPTION
Autozooecia rhombic in the middle tangential section, irregularly shaped in the place of bifurcation; high and short in longitudinal section, with well developed vestibule protruding highly above the colony surface; elongate to branch length; aperture positioned at distal to distal-abaxial end of chamber. Hemisepta absent.
COMPARISON
Mackinneyella robustiformis differs from M. praepluriformis in having smaller fenestrules and thinner branches, as well as in arrangement of microacanthostyles on the reverse surface.
Notes
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Linked records
Additional details
Identifiers
Related works
- Cites
- Figure: 10.5281/zenodo.4665468 (DOI)
- Is part of
- Journal article: 10.5281/zenodo.4665450 (DOI)
- Journal article: http://publication.plazi.org/id/0D6ED0351A20FFFEFFD1D63EF122FFDC (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/F157A84D1A37FFE7FD7ED372F0E6FA9B (URL)
Biodiversity
- Collection code
- PIN
- Family
- Acanthocladiidae
- Genus
- Mackinneyella
- Kingdom
- Animalia
- Order
- Fenestrida
- Phylum
- Bryozoa
- Scientific name authorship
- Morozova
- Species
- robustiformis
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Mackinneyella robustiformis (Morozova, 1965) sec. Ernst, Senowbari-Daryan & Hamedani, 2006
References
- MOROZOVA I. P. 1965. - [Bryozoa], in RUZHENTSEV V. E. & SARYCHEVA T. G. (eds), [The evolution and changes in the marine organisms at the Paleozoic-Mesozoic boundary]. Trudy Paleontologicheskogo Instituta 108: 183 - 197 (in Russian).
- XIA F. 1986. - Carboniferous and Early Permian bryozoans from Xainza, Northern Xizang. Bulletin of Nanjing Institute of Geology and Palaeontology, Academia Sinica 10: 201 - 254.
- MOROZOVA I. P. & LISITSYN D. V. 1996. - [Revision of the genus Polypora M'Coy, 1844]. Paleontologicheskii Zhurnal 4: 38 - 47 (in Russian).