Eostenopora nimia Morozova and Weis, 2002
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publication ID |
https://doi.org/ 10.5281/zenodo.13304717 |
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persistent identifier |
https://treatment.plazi.org/id/03D3EC2D-1F38-FFEC-3100-F8D8DE78D9EF |
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treatment provided by |
Felipe |
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scientific name |
Eostenopora nimia Morozova and Weis |
| status |
sp. nov. |
Eostenopora nimia Morozova and Weis View in CoL , sp. nov.
Fig. 6A–C View Fig .
Holotype: PIN 4873 View Materials /1, Fig. 6A–C View Fig .
Type locality: Holy Cross Mts (Central Poland), Górno, Józefka Hill (set A of Racki 1993), Laskowa Góra Beds; Middle Devonian, upper Givetian (?Middle Po. varcus to K. disparilis zones).
Derivation of the name: From Latin nimius, excessive.
Material.—Four incomplete colonies, 8 thin sections, PIN 4873/1–4873/4.
Diagnosis.— Eostenopora nimia sp. nov. resembles E. primiformis Duncan, 1939 from the Traverse Group of Michigan in having an incrusting colony, but is distinguished by the thick walls in exozone, wide peristomes in autozooecial and exilazooecial apertures, transversely laminated structure of the zooecial walls and by more abundant acanthostyles.
Description.—Colony encrusting a crinoid column(?). Maximum thickness of laminae 0.50 mm. The endozone is well distinguishable from the exozone. The thickness of the exozone 0.38–0.46 mm, width of the endozone— 0.06–0.11 mm. Zooecial walls in the exozone very thick— 0.08–0.15 mm with transversely laminated structure. Zooecial walls in the endozone 0.01 mm thick. Autozooecial chambers short. Only one or two straight diaphragms in each autozooecia. Apertures of autozooecia subcircular with thick peristome. The thickness of the peristome 0.03–0.04 mm. Diameter of the aperture 0.16–0.17 mm. Six apertures per 2 mm measured diagonally, five per 2 mm measured along colony. Distance between neighbouring apertural centers along the colony 0.26–0.32 mm. Apertures of autozooecia on the maculae arranged in irregular rows. They are oval, 0.19–0.22 mm long and 0.008 –0.009 mm wide. Exilazooecial apertures with thick walls (0.003 mm) are irregularly distributed. Outline of the exilazooecial apertures is subcircular with diameter 0.02– 0.04 mm. Acanthostyles on the zooecial walls occasionally vary from 0.016 to 0.030 mm in diameter. Eight to twelve acanthostyles surround each autozooecial aperture. Exozonal walls near the colony surface are pierced by numerous short pores (capillaries) 0.005 –0.006 mm in diameter.
Occurrence.—Only the type locality.
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