Eridopora sp.

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 : 706

Eridopora sp. ( Figs 8 F-G, 9A, B; Appendix)

MATERIAL. — SMF 21.192- SMF 21.193.

OCCURRENCE. — Lebanza Formation, Lower Devonian (Pragian); Arauz Sur (Arroyo section), Palencia, NW Spain (Cantabrian Mountains).

DESCRIPTION

Encrusting colonies 1.05-1.44 mm thick. Autozooecia growing from laminated basal layer. Autozooecial diaphragms few to absent, thin, planar or concave. Autozooecial apertures rounded to oval.Lunaria large, sharply triangular,consisting of hyaline material.Vesicles abundant both in endozone and exozone, moderately large, box-like,polygonal in tangential section, having flattened roofs, not completely isolating autozooecia, arranged commonly in a single row between autozooecia and 7-8 rows surrounding each autozooecial aperture. Layer of granular skeleton on colony surface thin. Autozooecial walls thin, granular.Maculae not observed.

COMPARISON

The present material is similar to Eridopora orbiculata (Kiepura, 1973) from the Middle Devonian of Poland and Germany, in the absence of acanthostyles skeleton but differs in having larger apertures (average autozooecial aperture width 0.31 vs 0.25 mm in E. orbiculata ).

Figures

FIG. 8. — A-E, Fistulipora arauzensis n. sp.; A-B, longitudinal section showing autozooecial and vesicles, paratype SMF 21.170; C, D, tangential section showing autozooecial apertures and vesicles, holotype SMF 21.165; E, longitudinal section showing lunarial deposits in exozone, paratype SMF 21.174;F, G, Eridopora sp. longitudinal section showing autozooecia and large irregular vesicles, SMF 21.192. Scale bars: A, F, G, 1 mm; B, C, E, 0.5 mm; D, 0.2 mm.