Ybselosoecia typica ( Manzoni, 1878 )

Moissette, Pierre, Antonarakou, Assimina, Kontakiotis, George, Cornée, Jean-Jacques & Karakitsios, Vasileios, 2021, Bryozoan faunas at the Tortonian-Messinian transition. A palaeoenvironmental case study from Crete Island, eastern Mediterranean, Geodiversitas 43 (26), pp. 1365-1400 : 1378-1379

Ybselosoecia typica ( Manzoni, 1878)

( Fig. 7 E-G)

Filisparsa typica Manzoni, 1878: 10, pl. 8, fig. 30. — Canu 1909: 115, pl. 14, figs 25-26.

Ybselosoecia typica – Buge 1956: 13, pl. 1, figs 3-4; pl. 2, figs 3-4. — Malecki 1963: 76, fig. 33; pl. 5, fig. 1. — Mongereau 1965: 317, fig. 1. — Vávra 1974: 362, pl. 2, figs 9-10. — Vávra 1984: 226, pl. 1, figs 2-3. — Moissette 1988: 56, pl. 7, figs 9, 13; 1997: 188, pl. 1, fig. 6. — El Hajjaji 1992: 56, pl. 2, figs 2-3. — Pouyet & Moissette 1992: 28, pl. 2, fig. 4. — Moissette et al. 1993: 87. — Moissette & Spjeldnaes 1995: 784, pl. 2, fig.4. — Haddadi-Hamdane 1996: 51, pl. 1, figs 11-12; pl. 2, fig. 11. — Pouyet 1997: 26, pl. 1, figs 1-4. — Zágoršek 2003: 119, pl. 4, figs 5-6. — Zágoršek 2010a: 31, pl. 15, figs 1-5. — Zágoršek et al. 2017: 115, fig. 2J.

OCCURRENCE. — Eocene: France, Italy, Germany, Austria, Romania, Poland ( Malecki 1963; Zágoršek 2003). Oligocene: France ( Buge 1964). Oligo-Miocene: Iran ( Zágoršek et al. 2017). Early Miocene: France ( Mongereau 1965). Middle Miocene: France, Austria, Hungary, Romania, Czech Republic, Poland ( Vávra 1984; Moissette et al. 2006). Late Miocene: Morocco, Algeria ( Moissette 1988), Tunisia ( Moissette 1997), Crete ( Moissette et al. 1993). Pliocene: Netherlands, France, Sicily ( Pouyet & Moissette 1992), Algeria (Haddadi-Hamdane 1996), Tunisia ( Buge 1956). Pleistocene:Rhodes ( Moissette & Spjeldnaes 1995). This fossil species has mostly been recorded from the Mediterranean and Paratethys basins. It has been recovered in a few instances together with deep-water bryozoan faunas: Messinian of western Algeria ( Moissette 2000) and Pleistocene of Rhodes ( Moissette & Spjeldnaes 1995).

DESCRIPTION

Vinculariiform colony. Dichotomous branches mostly flattened. Frontal smooth, zoecial tubes indistinct, quincuncially arranged and isolated, with well-developed sub-circular peristomes. Dorsal slightly convex, with thin transversal growth lines and perforated by small pseudopores.Gonozooid enlarged, also perforated by small pseudopores, occupying the whole width of a branch and encompassing up to ten zoecial tubes. Ooeciostome with flared, transverse and convoluted rim.

Figures

FIG. 7. — A, B, Anguisia verrucosa Jullien, 1882; A, bifurcating branch, FAN36: AMPG(IV) 3471; B, encrusting base (left) and erect peristome of the encrusting proximal zooid of a running branch (right), FAN35: AMPG(IV) 3470; C, D, Exidmonea atlantica (Forbes in Johnston, 1847); C, fragment of a branch, frontal view (with a gonozooid on the left upper part), POTB13: AMPG(IV) 2853a; D, fragment of a branch, dorsal view, POTB13: AMPG(IV) 2853b; E-G, Ybselosoecia typica (Manzoni, 1878); E, fragment of a branch (with a large gonozooid), frontal view, POTB13: AMPG(IV) 2881a; F, detail of the ooeciostome of another gonozooid, POTB13: AMPG(IV) 2881b; G, fragment of a branch, dorsal view, POTB13: AMPG(IV) 2881c. Scale bars: A, D, 200 µm; B, G, 100 µm; C-E, 500 µm.