Albardonia, Ernst & Carrera, 2022

Ernst, Andrej & Carrera, Marcelo G., 2022, A cool-water bryozoan association from the La Pola Formation (Sandbian, Ordovician) of Argentine Precordillera, Geodiversitas 44 (20), pp. 563-601 : 576

Genus Albardonia n. gen.

urn:lsid:zoobank.org:act:CF51A226-FD7D-4583-B045-A26177B30FC0

TYPE SPECIES. — Albardonia bifoliata n. sp., by present designation.

ETYMOLOGY. — The new genus is named after Albardon village near which this genus was found.

DIAGNOSIS. — Ramose colony consisting of bifoliate fronds; encrusting sheets and secondary overgrowth common; autozooecia budding from mesotheca or epitheca, having angular shape of transverse section in endozone; autozooecial apertures angular with rounded corners; basal diaphragms common both in endozone and exozone, straight, or inclined; mesozooecia abundant, containing densely spaced diaphragms; aktinotostyles moderately large, abundant, originating in exozone, autozooecial walls laminated, integrated with dark median lining, showing reversal V-shaped lamination, without cingulum; maculae lacking.

OCCURRENCE. — La Pola Formation, Upper Ordovician, Sandbian; Argentine Precordillera, western Argentina.

COMPARISON

The new genus is characterized by abundant mesozooecia and aktinotostyles. It is similar to the genus Leioclema Ulrich, 1882 in having abundant and large mesozooecia, but differs in the presence of aktinotostyles instead of acanthostyles in the latter genus.