Coscinium hermidensis, Ernst & Minwegen, 2006
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publication ID |
https://doi.org/ 10.5281/zenodo.13652021 |
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DOI |
https://doi.org/10.5281/zenodo.13652025 |
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persistent identifier |
https://treatment.plazi.org/id/92125B5E-2400-FF92-FFD0-67A473896B15 |
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treatment provided by |
Felipe |
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scientific name |
Coscinium hermidensis |
| status |
sp. nov. |
Coscinium hermidensis View in CoL sp. nov.
Fig. 3D–F; Table 2.
Derivation of the name: After the type locality.
Type material: Holotype ( SMF 1729 About SMF ) and two paratypes ( SMF 1775 About SMF and SMF 1736 About SMF ).
Type locality: La Hermida, Spain .
Type horizon: Picos de Europa Formation, Moscovian, Upper Carboniferous.
Other material.—SMF 1725, 1746, 1752, 1761, 1771, 1796, and 21 additional fragments.
Diagnosis.— Coscinium hermidensis sp. nov. differs from the most similar species C. cyclops Keyserling, 1846 in having smaller apertures (0.14–0.19 versus 0.25 mm in C. cyclops ) and in more closely spaced apertures (12–13 versus average 8 per 5 mm longitudinally). The new species differs from C. keyserlingi Stuckenberg, 1895 in having smaller apertures and poorly developed lunaria.
Description.—Bifoliate frondescent colony. Branches lens−shaped in cross−section, 2.63–4.00 mm wide and 0.68–1.05 mm thick, occasionally anastomosing to give oval fenestrules, 0.9 mm wide and 2.0 mm long. Mesotheca straight, three−layered, consisting of dark medial layer and two outer pale layers, 0.04–0.05 mm thick, containing abundant hyaline rods. Rods 0.01 mm in diameter, spaced densely ( Fig. 3F 1 View Fig ). Indistinct longitudinal crests present on mesotheca. Autozooecia short, budding parallel to the mesotheca for a distance of about three zooecial diameters, semicircular in basal cross section, completely separated by vesicular skeleton, arranged in 8–10 rows on branches. Apertures oval, spaced 9–10 longitudinally and 12–13 diagonally in 5 mm distance. Lunaria weakly developed. Autozooecia surrounded by a thick layer of granular skeleton. Autozooecial diaphragms rare to common, thin, planar. Skeletal vesicles relatively large, with rounded roofs, covered at the colony surface by a thick layer of dense calcitic material, arranged in 2–3 rows between autozooecia.
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