Eridotrypella validaeformis, Ernst & Fernández & Fernández-Martínez & Vera, 2012

Ernst, Andrej, Fernández, Luis Pedro, Fernández-Martínez, Esperanza & Vera, Carmen, 2012, Description of a bryozoan fauna from mud mounds of the Lebanza Formation (Lower Devonian) in the Arauz area (Pisuerga-Carrión Province, Cantabrian Zone, NW Spain), Geodiversitas 34 (4), pp. 693-738 : 712-714

publication ID

https://doi.org/ 10.5252/g2012n4a1

persistent identifier

https://treatment.plazi.org/id/03A6D074-FFFC-7E06-FD17-FB6AFE03FB79

treatment provided by

Marcus

scientific name

Eridotrypella validaeformis
status

sp. nov.

Eridotrypella validaeformis n. sp. ( Figs 12 View FIG G-I; 13A-C; Appendix)

HOLOTYPE. — SMF 21.227 About SMF .

PARATYPES. — SMF 21.228- SMF 21.237.

ETYMOLOGY. — The species name refers to the similarity with the species Eridotrypella valida Duncan, 1939 . Type locality. — Arauz Sur (Arroyo section), Province of Palencia, NW-Spain (Cantabrian Mountains).

TYPE HORIZON. — Lebanza Formation, Lower Devonian (Pragian).

DIAGNOSIS. — Ramose branched colonies with narrow, distinctly separated exozones; autozooecial diaphragms rare; exilazooecia rare; acanthostyles rare to common, up to 3 surrounding autozooecial apertures; maculae with slightly larger autozooecia.

DESCRIPTION

Ramose branched colonies, branches 1.72-2.99mm in diameter. Exozones 0.36-0.72 mm wide, endozones 0.88-1.94 mm wide. Exozones distinctly separated from endozones. Secondary overgrowths occurring. Autozooecia polygonal in transverse section, long in endozones, bending sharply in exozones and intersecting colony surface at angles of 77-83°. Autozooecial apertures polygonal with rounded corners. Autozooecial diaphragms rare to common, straight, thin, occurring mainly in the distal parts of autozooecia. Exilazooecia rare, short, rounded-polygonal in cross section. Acanthostyles rare to common, up to 3 surrounding autozooecial apertures, moderately large, having distinct narrow cores and laminated sheaths. Autozooecial walls in endozones granular, locally crenulated, 0.005 - 0.010 mm thick; in exozones finely laminated, irregularly thickened, merged, containing spherules, 0.03-0.06 mm thick. Laminated cingulum locally developed, 0.005 -0.010 mm thick. Maculae consisting of slightly larger autozooecia.

COMPARISON

Eridotrypella validaeformis n.sp. differs from E.valida Duncan, 1939 from the Middle Devonian of Michigan, in having thinner branches and smaller autozooecia (autozooecial aperture widths 0.12- 0.17 mm vs 0.21-0.25 mm in E. valida ). Eridotrypella validaeformis n. sp. differs from E. minuta Morozova, 1961 from the Upper Devonian of Kuznetzk Basin, in having fewer acanthostyles and in the presence of maculae.

SMF

Forschungsinstitut und Natur-Museum Senckenberg

Kingdom

Animalia

Phylum

Bryozoa

Class

Stenolaemata

Order

Trepostomatida

Family

Eridotrypellidae

Genus

Eridotrypella

Loc

Eridotrypella validaeformis

Ernst, Andrej, Fernández, Luis Pedro, Fernández-Martínez, Esperanza & Vera, Carmen 2012
2012
Loc

Eridotrypella validaeformis

Ernst & Fernández & Fernández-Martínez & Vera 2012
2012
Loc

Eridotrypella validaeformis

Ernst & Fernández & Fernández-Martínez & Vera 2012
2012
Loc

E. minuta

Morozova 1961
1961
Loc

E.valida

Duncan 1939
1939
Loc

E. valida

Duncan 1939
1939
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