Pliensbachian corals from the Western Tethys Author Vasseur, Raphaël Université de Lorraine, CNRS, lab. GeoRessources, UMR 7359, BP 70239, F- 54506 Vandoeuvre-lès-Nancy cedex (France) raphaelvasseur@wanadoo.fr Author Lathuilière, Bernard Université de Lorraine, CNRS, lab. GeoRessources, UMR 7359, BP 70239, F- 54506 Vandoeuvre-lès-Nancy cedex (France) bernard.lathuiliere@univ-lorraine.fr text Geodiversitas 2021 2021-11-23 43 22 1187 1291 journal article 10.5252/geodiversitas2021v43a22 1638-9395 5764379 urn:lsid:zoobank.org:pub:6D1643AD-66A5-4678-9397-CE08E610D641 Margarosmilia dividenda n. sp. ( Fig. 36 ) urn:lsid:zoobank.org:act: 37CC44E3-55EF-4487-82C3-90E35002B5DA TYPE MATERIAL. — Holotype CPUN Gu 1105E2-1. STUDIED SAMPLE. — CPUN Gu 1105E2-1. ETYMOLOGY. — Referstothephacelo-thamnasterioidaspectofthecolony. TYPE HORIZON. — Upper Pliensbachian ( Margaritatus ammonite zone). TYPE LOCALITY. — Guigou plateau, 33°27’45”N , 4°56’43”W , Middle Atlas of Morocco . GEOGRAPHIC AND STRATIGRAPHIC RANGES. — Upper Pliensbachian of Guigou Plateau ( Middle Atlas of Morocco ) . DESCRIPTION Phacelo-thamnasterioid colony with rounded calices irregular in size and shape. Growth by intracalicular budding. Radial elements are compact, free or more often joined septa that are laterally sharply granulated. Trabecular microstructure. The inner edge of major septa sometimes join together in the axis of the calice. Endotheca made of thin vesicular dissepiments. Synapticulae not observed. An epitheca s.l. wraps the corallites. Calicular diameter: 5 to 17 mm – Number of septa: 84 to 123 – Septal density: 5 for 2 mm – Trabecular density: approximately 4 per 1 mm . FIG. 34. — Spongiocoenia liasica ( Turnšek & Geyer, 1975 ) , n. comb. : A , distal view of the specimen CPUN AM16178-2; B , distal view of the specimen CPUN AM16188-31; C , transverse thin section in the specimen CPUN DA3105E3-2; D , longitudinal thin section in the specimen CPUN DA3105E3-3; E , detail in distal view of the specimen CPUN AM16188-7; F , detail in longitudinal thin section of the specimen CPUN DA3105E3-3. Scale bars: A, D, 4 mm; B, 5 mm; C, 2 mm; E, 1 mm; F, 0.5 mm. FIG. 35. — Dimorphastrea ? menchikoffi ( Beauvais,1986 ) : A , distal view of the specimen MNHN.F.R11641; B , lateral view of the specimen MNHN.F.R11641; C , proximal view of the specimen MNHN.F.R11641; D , detail in distal view of the specimen MNHN.F.R11641; E , detail in distal view of the specimen MNHN.F.R11641. Scale bars: A, 4 mm; B, C, D, 1 cm; D, 5 mm; E, 3 mm. SIMILARITIES AND DIFFERENCES This taxon differs from all the other species in the genus by the phacelo-thamnasterioid aspect of the colony.