Adeonellopsis MacGillivray, 1886

ZÁGORŠEK, KAMIL, 2010, BRYOZOA FROM THE LANGHIAN (MIOCENE) OF THE CZECH REPUBLIC PART II: SYSTEMATIC DESCRIPTION OF THE SUBORDER ASCOPHORA LEVINSEN, 1909 AND PALEOECOLOGICAL RECONSTRUCTION OF THE STUDIED PALEOENVIRONMENT, Acta Musei Nationalis Pragae Series B 66 (3 - 4), pp. 139-255 : 139-255

Genus Adeonellopsis MacGillivray, 1886

Colony erect, columnar or flat, bilaminar to multilaminar. Autozooecia with marginal pores and a large spiramen area (“cribrimorph area”) occupying almost the whole frontal wall. Avicularia are adventitious, either paired or single. Vicarious avicularia may also be present. Brooding autozooecia distinctly dimorphic, as large as the autozooecia, but rarely developed.

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Adeonellopsis coscinophora ( REUSS, 1847) Pl. 76, Fig. 1-4

v. * 1847 Eschara coscinophora m. – Reuss p. 67, Pl. 8, Fig. 20

v. 1862 Eschara coscinophora (REUSS) – Stoliczka p. 89, Pl. 2, Fig. 11

1862 Eschara subteres sp.n. – Roemer p. 205, Pl. 35, Fig. 6

1963 Adeonellopsis subteres (ROEMER) – Braga p. 37, Fig. 4

1963 Adeonellopsis punctata (REUSS) – Małecki p. 128, Pl. 14, Fig. 4

1974 Adeonellopsis coscinophora (REUSS) – David and Pouyet p. 201, Pl. 8, Fig. 3

1977 Adeonellopsis coscinophora (REUSS) – Vávra p. 148

T y p e: The holotype from the section (Rudelsdorf) is deposited in the Natural History Museum Vienna under the number 1878.11.125 (called ‘neolectotype’ by David and Pouyet (1974), who mentioned Podivín as a type locality) .

M a t e r i a l: Altogether 7 specimens were studied from Moravia and 2 from the collection in Brno Natural History Museum (Moravské Zemské Muzeum) from a section at Drnovice .

D i a g n o s i s: Autozooecia oval with thick, smooth remains of the frontal wall which is vaguely discernible in the distal part. Marginal areolar pores are rare, very small and arranged in a regular position around the autozooecium. Spiramen area oval, large and perforated by 8 to 10 pores, but sometimes also larger and perforated by up to 15 pores. Aperture oval, circular to semilunar. Avicularium placed proximally from the aperture, small, circular, but sometimes also drop-like, sharpening distally or laterally. Brooding zooids not known.

R e m a r k s: Adeonellopsis coscinophora ( REUSS, 1847) differs from other similar species in having a small avicularium always tapering distally, a large spiramen area and complete remains of the frontal wall. The size of the spiramen area and the tapering of avicularia may vary, but always complete remains of the frontal wall and a large spiramen area are present.