Eridopora suarezi, Ernst & Wyse Jackson & Aretz, 2015

Ernst, Andrej, Wyse Jackson, Patrick N. & Aretz, Markus, 2015, Bryozoan fauna from the Mississippian (Visean) of Roque Redonde (Montagne Noire, southern France), Geodiversitas 37 (2), pp. 151-213 : 162

Eridopora suarezi n. sp.

( Figs 10E, F ; 11A ; Appendix)

ETYMOLOGY. — The species is named in honour of Juan Luis Suárez Andrés in acknowledgment of his studies of Palaeozoic bryozoans of Spain.

HOLOTYPE. — SMF 21.794 .

PARATYPES. — SMF 21.795- SMF 21.801, TCD.60338, 60345.

TYPE LOCALITY. — Roque Redonde (Montagne Noire, southern France).

TYPE HORIZON. — Carboniferous, Mississippian (upper Visean).

DIAGNOSIS. — Thin to moderately thick encrusting colonies; apertures moderate in size, with large triangular lunaria; vesicles large, 6-11 surrounding each autozooecial aperture; maculae present, consisting of vesicular skeleton.

DESCRIPTION

Encrusting colony, 0.42-3.35 mm thick. Autozooecia growing from thin epitheca, bending in the early exozone to the colony surface. Basal diaphragms rare. Autozooecial apertures circular to oval. Lunaria well-developed, triangular; ends of lunaria not indenting autozooecia. Vesicles small to large, separating autozooecia in 1-2 rows, 6-11 surrounding each autozooecia aperture, with rounded roofs, polygonal in tangential section. Autozooecial walls granular prismatic, 0.005 -0.010 mm thick. Maculae consisting of vesicular skeleton, slightly elevated, 1.0- 1.2 mm in diameter, surrounded by larger autozooecia with lunaria directed to the centre of the macula.

COMPARISON

The present material is similar to Eridopora macrostoma Ulrich, 1882 from the Mississippian of USA and the British Isles. However, it differs in larger vesicles and in smaller apertures (average aperture width 0.32 mm vs 0.39 mm ( Bancroft 1986) to 0.41 mm (McKinney 1972) in E. macrostoma ).

Suborder HEXAGONELLINA Morozova, 1970 Family HEXAGONELLIDAE Crockford, 1947

Figures

FIG. 10. — A-D, Dybowskiella piriforme n. sp.; A, tangential section showing autozooecial aperture with lunarium, paratype SMF 21.787; B-D, longitudinal section, paratype SMF 21.786; E, F, Eridopora suarezi n. sp. E, longitudinal section, paratype SMF 21.799; F, tangential section, holotype SMF 21.794. Scale bars: A, 0.2 mm; B, E, F, 1 mm; C, D, 0.5 mm.

FIG. 11. — A, Eridopora suarezi n. sp., tangential section showing autozooecial aperture,holotype SMF 21.794: B-F. Volgia deftera n. sp.; B, transverse section of the colony, holotype SMF 21.802; C, transverse section of the colony, paratype SMF 21.812; D, longitudinal section, paratype SMF 21.811; E, F, branch transverse section, paratype SMF 21.805. Scale bars: A, 0.2 mm; B-D, 2 mm; E, 1 mm; F, 0.5 mm.