Petalosis, Ernst & Fernández & Fernández-Martínez & Vera, 2012
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publication ID |
https://doi.org/ 10.5252/g2012n4a1 |
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DOI |
https://doi.org/10.5281/zenodo.5465728 |
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persistent identifier |
https://treatment.plazi.org/id/03A6D074-FFE2-7E1C-FCB6-FBE8FE91FECF |
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treatment provided by |
Marcus |
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scientific name |
Petalosis |
| status |
gen. nov. |
Petalosis n. gen.
ETYMOLOGY. — The genus name refers to the petaloid shape of autozooecial apertures due to spine-like indentions.
TYPE SPECIES. — Petalosis clarus n. sp. Lebanza Formation , Lower Devonian (Pragian) ; Arauz Sur (Arroyo section), Province of Palencia , NW-Spain (Cantabrian Mountains) .
DIAGNOSIS. — Encrusting colonies with secondary overgrowths; autozooecial apertures circular to oval; autozooecia growing from thick epitheca, bending sharply at their bases towards colony surface; basal diaphragms common to abundant; lunaria well developed, prominent, horseshoe shaped to triangular, containing 2-3 styles; one or two pairs of spine-like indentions in lateral parts of proximal ends of autozooecia; vesicles large and high, irregularly shaped, polygonal in tangential section, box-like to hemispherical, with plane or concave roofs; bands of large and irregularly shaped vesicles occurring; acanthostyles between autozooecial apertures; autozooecial walls granular in endozones and laminated in exozones; maculae not observed.
COMPARISON
Petalosis n. gen. differs from Fistuliporella Simpson, 1895 in having spine-like indentions in autozooecial apertures.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.