Late Givetian ammonoids from Hassi Nebech (Tafilalt Basin, Anti-Atlas, southern Morocco)

The Hassi Nebech area of the SE Tafilalt (Tafilalt Basin, Anti-Atlas, Morocco) yielded the richest and most diverse late Givetian ammonoid fauna on a global scale. Above the distinctive regional "Lower Marker Bed" (<i>Synpharciceras clavilobum</i> Zone), abundant loosely collected limonitic specimens derive from hypoxic shales of the <i>Taouzites taouzensis</i> to <i>Petteroceras errans</i> zones. The ontogenetic morphometry and intraspecific variability of a total of 30 species representing five families, the Acanthoclymeniidae, Taouzitidae, Pharciceratidae, Petteroceratidae, and Tornoceratidae, are documented. New taxa are: <i>Pseudoprobeloceras praecox</i> n. sp., <i>Scaturites minutus</i> n. gen. n. sp., <i>Darkaoceras velox</i> n. sp., <i>Pharciceras decoratum</i> n. sp., <i>Ph. fornix</i> n. sp., <i>Ph. subconstans</i> n. sp., <i>Ph. involutum</i> n. sp., <i>Lunupharciceras incisum</i> n. sp., <i>Transpharciceras procedens</i> n. gen. n. sp., <i>Stenopharciceras progressum</i> n. sp., <i>Pluripharciceras</i> n. gen. (type species: <i>Synpharciceras plurilobatum</i> Petter, 1959), <i>Plu. orbis</i> n. sp., <i>Synpharciceras frequens</i> n. sp., <i>Lobotornoceras bensaidi</i> n. sp., <i>Nebechoceras eccentricum</i> n. gen. n. sp., and <i>Phoenixites lenticulus</i> n. sp. The documentation of conch and particularly suture ontogeny and intraspecific variability necessitates a revised diagnosis for ten taxa. <i>Manticoceras pontiformis</i> Termier & Termier, 1950, <i>Probeloceras costulatum</i> Petter, 1959, and <i>Pseudoprobeloceras nebechense</i> Bensaïd, 1974 are regarded as subjective junior synonyms of <i>Ps. pernai</i> (Wedekind, 1918). <i>Sandbergeroceras acutum</i> Termier & Termier, 1950 is a subjective synonym of <i>Taouzites taouzensis</i> (Termier & Termier, 1950). <i>Pharciceras applanatum</i> Bensaïd, 1974 is transferred to <i>Extropharciceras</i>. Other forms (<i>Ph</i>. aff. <i>tridens</i>, <i>Ph</i>. cf. <i>subconstans</i> n. sp., <i>Extropharciceras</i> n. sp. 2, <i>Ex</i>. cf. <i>arenicum</i>, <i>Ex</i>. cf. <i>applanatum</i>, <i>Synpharciceras</i> sp., <i>Plu</i>. cf. <i>plurilobatum</i>) are described in open nomenclature. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.201300001" target="_blank">10.1002/mmng.201300001</a

The ammonoids from the Dalle à <i>Merocanites</i> of Timimoun (Late Tournaisian–Early Viséan; Gourara, Algeria)

The ammonoids from the Early Carboniferous (Mississippian) Dalle à Merocanites of Timimoun (Gourara, Algeria) are described. The following new ammonoid taxa are introduced: subfamily Hammatocyclinae n. subfam., Hammatocyclus pollex n. sp., Hammatocyclus corrugatus n. sp., Neopericyclus arenosus n. sp., Ammonellipsites pareyni n. sp., Ammonellipsites menchikoffi n. sp., Ammonellipsites conradae n. sp., Muensteroceras fabrei n. sp., Eurites commutatus n. sp., Eurites pondus n. sp., subfamily Trimorphoceratinae n. subfam., Trimorphoceras n. gen., Trimorphoceras crassilens n. sp., Trimorphoceras absolutum n. sp., Trimorphoceras molestum n. sp., Obturgites n. gen., Obturgites polysarcus n. sp., Obturgites oligosarcus n. sp., Dzhaprakoceras dzhazairense n. sp., and Merocanites merocanites n. sp. These species occur in one very prolific horizon and can be attributed to the North African Ammonellipsites-Merocanites Assemblage (Fascipericyclus -Ammonellipsites Genus Zone; Late Tournaisian to Early Viséan). They represent one of the most diverse ammonoid faunas known from this time interval. doi:10.1002/mmng.200900011</a

Tournaisian (Early Carboniferous/Mississippian) ammonoids from the Ma'der Basin (Anti-Atlas, Morocco)

Three succeeding assemblages of Early Tournaisian (Mississippian) ammonoids are described from Fezzou (Ma'der) in the Anti-Atlas of Morocco; they are, in ascending order, composed of the following genera: (1) <i>Gattendorfia-Eocanites</i> Assemblage: <i>Acutimitoceras, Costimitoceras, Imitoceras, Kornia, Gattendorfia, Kazakhstania</i>, and <i>Eocanites</i>; (2) <i>Gattendorfia-Kahlacanites</i> Assemblage: <i>Acutimitoceras, Hasselbachia, Gattendorfia, Becanites</i>, and <i>Kahlacanites</i>; and (3) <i>Goniocyclus-Protocanites</i> Assemblage: <i>Globimitoceras, Imitoceras, Gattendorfia, Goniocyclus, Eocanites</i>, and <i>Protocanites</i>. The following taxa are newly described: <i>Globimitoceras rharrhizense</i> n. sp., <i>Acutimitoceras sarahae</i> n. sp., <i>A. endoserpens</i> n. sp., <i>A. pentaconstrictum</i> n. sp., <i>Costimitoceras aitouamar</i> n. sp., <i>Hasselbachia arca</i> n. sp., <i>Kornia citrus</i> n. gen. n. sp., <i>Gattendorfia lhceni</i> n. sp., and <i>G. gisae</i> n. sp. <br><br> Drei aufeinander folgende Vergesellschaftungen von Ammonoideen aus dem Tournaisium (Mississippium) werden von Fezzou (Ma'der) im Anti-Atlas von Marokko beschrieben; diese werden, in aufsteigender Reihenfolge, durch die folgenden Gattungen zusammen gesetzt: (1) <i>Gattendorfia-Eocanites</i> Assemblage: <i>Acutimitoceras, Costimitoceras, Imitoceras, Kornia, Gattendorfia, Kazakhstania</i> und <i>Eocanites</i>; (2) <i>Gattendorfia-Kahlacanites</i> Assemblage: <i>Acutimitoceras, Hasselbachia, Gattendorfia, Becanites</i> und <i>Kahlacanites</i>; und (3) <i>Goniocyclus-Protocanites</i> Assemblage: <i>Globimitoceras, Imitoceras, Gattendorfia, Goniocyclus, Eocanites</i> und <i>Protocanites</i>. Die folgenden Taxa werden neu beschrieben: <i>Globimitoceras rharrhizense</i> n. sp., <i>Acutimitoceras sarahae</i> n. sp., <i>A. endoserpens</i> n. sp., <i>A. pentaconstrictum</i> n. sp., <i>Costimitoceras aitouamar</i> n. sp., <i>Hasselbachia arca</i> n. sp., <i>Kornia citrus</i> n. gen. n. sp., <i>Gattendorfia lhceni</i> n. sp. und <i>G. gisae</i> n. sp. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200700003" target="_blank">10.1002/mmng.200700003</a