CATALOG OF ORIGINAL DESCRIPTIONS: Biglobigerinella algeriana ten Dam&Sigal 1949
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Citation: Biglobigerinella algeriana ten Dam&Sigal 1949Taxonomic rank: speciesType specimens: P. 235, tfs. 1-3. Tf. 1, holotype: 2-3, paratype, : holotype, no. A 967 h; figured paratype (figs. 2-3), no. A 967; unfigured paratypes, no. A 959.Type age (chronostrat): Upper Cretaceous, upper Senonian; marl.Type locality: Along the road from Bougainville to Holiere, 5 km. north of Bou-Caid, Ouarsenis, Algeria (very common). Numerous specimens also found elsewhere in the Senonian of eastern Algeria. Type repository: personal collection of A. ten Dam;
Original Description "Diagnose. -Test planispirale, involute, probablement trochoide dans la partie initiale, en particulier chez la forme microspherique . Loges globuleuses dans le stade jeune, plus ou moins aplaties dans le stade adulte, la derniere partagee en deux loges globulenses , une de chaque cote du plan d'enroulement; cinq ou six loges au total dans le dernier tour. Sutures nettes et deprimees. Parois calcaires, finement perforees, surface legerement rugueuse mais sans epines. Ouverture en fente etroite, a la base des loges et souvent a peine visible. Size: "Dimensions. - Holotype: Diametre maximum, 0.30 mm.; epaisseur maximum, 0.21 mm. Extra details from original publication "Discussion. - On peut souvent observer un passage graduel du stade jeune identique a Globigerinella au stade adulte a derniere loge partagee en deux. On voit d'abord un aplatissement de la derniere loge, laquelle devient de plus en plus large pour finalement se partager en deux loges globuleuses. Cette espece est tres voisine de Biglobigerinella multispina Lalicker mais elle est nettement moins epaisse (le rapport diametre-epaisseur est de l'ordre de 10/7 pour B. algeriana et de 10 / 9 pour B. multispina); la surface du type generique (B. multispina) est ornee de petites epines, tandis que B. algeriana montre une surface legerement rugueuse, mais nettement depourvue d'epines."
References:
ten Dam, A. & Sigal, J. (1949). Sur une espèce nouvelle du genre de Foraminifères Biglobigerinella Lalicker, 1948. Compte Rendu Sommaire des Séances de la Société Géologique de France. 11: 234-235. gs
Biglobigerinella algeriana compiled by the pforams@mikrotax project teamviewed: 21-4-2025
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