Mecynoecia cf. proboscidea (Milne-Edwards, 1838)

Zágoršek, Kamil & Gordon, Dennis P., 2014, Revision of the Oligocene bryozoan taxa described by Stoliczka (1862), with the description of a new genus of Bryocryptellidae, Geodiversitas 36 (4), pp. 541-564 : 546

Mecynoecia cf. proboscidea (Milne-Edwards, 1838) ( Fig. 1F )

Pustulopora proboscidea Milne-Edwards, 1838: 219 , pl. 12, fig. 2.

Pustulopora attenuata Stoliczka, 1862: 77 , pl. 1, fig. 1.

Mecynoecia proboscidea – Zágoršek 2010: 32, pl. 18, figs 1-5 (cum syn.).

MATERIAL EXAMINED. Holotype of Pustulopora attenuata , registered as 2010/259/16A.

DIAGNOSIS. — Colony with four autozooecial tubes arranged around branch axis.Tubes very long, with circular to oval aperture situated on long peristomes. Frontal walls long, convex. Gonozooecium not developed.

REMARKS

Ŋe arrangement of zooecia very closely resembles that in Mecynoecia proboscidea , which is one of the commonest cyclostomes species in the Eocene (see Zágoršek 2003). Insofar as no gonozooecium is known in any of the Stoliczka specimens, the identification is not certain.Registered as 2010/259/16B are unrecognizable cheilostomes with a similar arrangement of zooecia.

Figures

FIG. 1. — A, Exidmonea hoernesi (Stoliczka, 1862), general view of holotype showing diagnostic features: one aperture, close to the dorsal side of the colony, which is always arranged outside the fascicle; B, Exidmonea giebeli (Stoliczka, 1862), general view of holotype; C, D, holotype of Filisparsa tenella identified as Filisparsa? sp. due to the poor preservation and lack of the gonozooecium; E, one of the syntypes of Pustulopora (Clausa) retifera identified as Mecynoecia cf. pulchella (Reuss, 1847) owing to the lack of a gonozooecium; F, holotype of Pustulopora attenuate identified as Mecynoecia cf. proboscidea (Milne-Edwards, 1838) owing to the lack of a gonozooecium; G, H, syntype of Alveolaria Buski identified as?Bobiesipora fasciculata (Reuss, 1848); J, holotype of Heteropora similis Stoliczka, 1862, identified as nomen dubium due to the very poor preservation and the absence of a gonozooecium or any other characteristic features; K, L, holotype of Pavotubigera anhaltina identified as “Disporella anhaltina (Stoliczka, 1862)” nomen dubium owing to poor preservation and the absence of a gonozooecium. Scale bars: A-G, 1 mm; H-L, 100 μm.