The ammonoids from two very prolific horizons in the upper Kahla Sandstone (Tournaisian, Early Carboniferous) of Timimoun (Gourara, Algeria) are described monographically. Nine new ammonoid species are introduced: <i>Imitoceras altilobatum</i> n. sp., <i>Triimitoceras amplisellatum</i> n. sp., <i>Kazakhstania inequalis</i> n. sp., <i>Acrocanites imperfectus</i> n. sp., <i>Xinjiangites scalaris</i> n. sp., and <i>Becanites canalifer</i> n. sp. from the North African <i>Kazakhstania-Acrocanites</i> Assemblage as well as <i>Acrocanites recurvus</i> n. sp., <i>Becanites singularis</i> n. sp., and <i>Becanites inflateralis</i> n. sp. from the <i>Pericyclus-Progoniatites</i> Assemblage. The first of these is one of the most diverse ammonoid faunas known from this time interval. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200900009" target="_blank">10.1002/mmng.200900009</a>
Twenty-seven ammonoid species are described from the Argiles de Timimoun of Timimoun (Gourara, Algeria). The following taxa are newly described: <i>Rhnetites</i> n. gen., <i>Rhnetites rhnetensis</i> n. sp., <i>Rhnetites ouladallalensis</i> n. sp., <i>Parahammatocyclus mutaris</i> n. sp., <i>Bollandoceras nitens</i> n. sp., <i>Bollandoceras subangulare</i> n. sp., <i>Bollandoceras politum</i> n. sp., <i>Bollandoceras aridum</i> n. sp., <i>Bollandoceras zuhara</i> n. sp., <i>Bollandoceras mirrih</i> n. sp., <i>Benimehlalites</i> n. gen., <i>Benimehlalites benimehlalensis</i> n. sp., <i>Benimehlalites belkassemensis</i> n. sp., <i>Benimehlalites brinkmanni</i> n. sp., <i>Pachybollandoceras</i> n. gen., <i>Pachybollandoceras intraevolutum</i> n. sp., <i>Pachybollandoceras repens</i> n. sp., Bollanditinae n. subfam., <i>Gourarites</i> n. gen., <i>Gourarites hagaraswad</i> n. sp., <i>Gourarites hagarkarim</i> n. sp., <i>Gourarites mustari</i> n. sp., <i>Gourarites zuhal</i> n. sp., <i>Semibollandites</i> n. gen., <i>Semibollandites kamil</i> n. sp., <i>Semibollandites pauculus</i> n. sp., <i>Semibollandites qawiy</i> n. sp., <i>Timimounia</i> n. gen., <i>Timimounia timimounensis</i> n. sp., <i>Timimounia lunula</i> n. sp., Daaitidae n. fam., <i>Daaites</i> n. gen., <i>Daaites daaensis</i> n. sp., <i>Dimorphoceras lanceolobatum</i> n. sp., <i>Nomismoceras salim</i> n. sp., and <i>Nomismoceras waltoni</i> n. sp. The species occur in three successive horizons and can be attributed to the <i>Bollandites-Bollandoceras</i> Genus Zone (Early and Middle Viséan). They represent the most diverse ammonoid fauna known from this time interval. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.200900013" target="_blank">10.1002/mmng.200900013</a>
Three succeeding assemblages of Early Tournaisian (Mississippian) ammonoids are described from Fezzou (Ma'der
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>
A small ammonoid fauna, of probable middle Early Tournaisian age, is described from the Gara el Kahla near Timimoun, Gourara, Algerian Sahara. The following taxa are described: <i>Acutimitoceras algeriense</i> n. sp., <i>Acutimitoceras sinulobatum</i> n. sp., <i>Acutimitoceras</i> sp. A, <i>Hasselbachia gourara</i> n. sp., <i>Gattendorfia jacquelinae</i> n. sp., <i>Gattendorfia</i> cf. <i>crassa</i> Schmidt. 1924, <i>Kahlacanites</i> n. gen., <i>Kahlacanites meyendorfi</i> n. sp., <i>Kahlacanites mariae</i> n. sp., and <i>Kahlacanites timimounensis</i> n. sp. <br><br> Eine kleine Ammonoideenfauna mit wahrscheinlich mittlerem Untertournai-Alter von der Gara el Kahla bei Timimoun (Gourara, Algerische Sahara) wird untersucht. Die folgenden Taxa warden beschrieben: <i>Acutimitoceras algeriense</i> n. sp., <i>Acutimitoceras sinulobatum</i> n. sp., <i>Acutimitoceras</i> sp. A, <i>Hasselbachia gourara</i> n. sp., <i>Gattendorfia jacquelinae</i> n. sp., <i>Gattendorfia</i> cf. <i>crassa</i> Schmidt, 1924, <i>Kahlacanites</i> n. gen., <i>Kahlacanites meyendorffi</i> n. sp., <i>Kahlacanites mariae</i> n. sp. und <i>Kahlacanites timimounensis</i> n. sp. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.20040070107" target="_blank">10.1002/mmng.20040070107</a>
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.