Albardonia bifoliata, Ernst & Carrera, 2022
publication ID |
https://doi.org/ 10.5252/geodiversitas2022v44a20 |
publication LSID |
urn:lsid:zoobank.org:pub:5EC74771-0B7B-494D-ADC8-79BECD097A3A |
DOI |
https://doi.org/10.5281/zenodo.6723090 |
persistent identifier |
https://treatment.plazi.org/id/8C45367C-9280-4982-A6C2-9E757EFFD061 |
taxon LSID |
lsid:zoobank.org:act:8C45367C-9280-4982-A6C2-9E757EFFD061 |
treatment provided by |
Admin |
scientific name |
Albardonia bifoliata |
status |
n. gen., n. sp. |
Albardonia bifoliata n. gen., n. sp.
( Figs 8G, H View FIG ; 9 View FIG A-F; Appendix 1)
urn:lsid:zoobank.org:act:8C45367C-9280-4982-A6C2-9E757EFFD061
HOLOTYPE. — CEGH-UNC 27538 c.
PARATYPES. — CEGH-UNC 27507 a, b, CEGH-UNC 27520 a, b, d, CEGH-UNC 27528 a, CEGH-UNC 27529 a, CEGH-UNC 27530 a, b, e, f, g, CEGH-UNC 27532 a, CEGH-UNC 27533 a, b, CEGH-UNC 27537 b, CEGH-UNC 27538 a, b, CEGH-UNC 27539 b, CEGH-UNC 27541 a (in total, 19 thin sections of 10 colonies).
TYPE LOCALITY. — La Pola creek section near Albardon village, San Juan Province, Argentine Precordillera, western Argentina.
TYPE HORIZON. — La Pola Formation, Upper Ordovician, Sandbian.
DIAGNOSIS. — As for genus.
ETYMOLOGY. — The species name refers to the bifoliate colony shape of the new species.
DESCRIPTION
Bifoliate (frondose) colony starting from encrusting sheets. Fronds 0.70-1.30 mm in thickness. Encrusting sheets 0.66- 1.31 mm thick. Secondary overgrowths occurring. Autozooecia budding from mesotheca, having angular shape of transverse section in endozone. Autozooecial apertures angular with rounded corners. Mesotheca 0.01-0.02 mm in thickness. Basal diaphragms common both in endozone and exozone, straight, or inclined. Mesozooecia abundant, 3-8 surrounding each autozooecial aperture, containing densely spaced diaphragms. Aktinotostyles moderately large, abundant, 5-7 surrounding each autozooecial aperture, originating in the outer exozone. Autozooecial walls granular, 0.010 -0.015 mm thick, irregularly undulating in endozones; laminated, integrated with dark median lining, showing reversal V-shaped lamination, without cingulum, 0.02-0.05 mm thick in exozones. Maculae not observed.
COMPARISON
As for genus.
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.
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