CATALOG OF ORIGINAL DESCRIPTIONS: Pseudoguembelina leroyi Kavary in Kavary&Frizzell 1964
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Citation: Pseudoguembelina leroyi Kavary in Kavary&Frizzell 1964taxonomic rank: SpeciesType specimens: figured specimens (figs. 17-18), no. F-76-10.Type sample (& lithostrat): Globigerina Marls Group; associated with Globotruncana, Heterohelix, Planoglobulina, Pseudoguembelina. Rugoglobigerina, and Bolivinoides draco.Type age (chronostrat): Upper Cretaceous, Maastrichthian, Type locality: A section at Zardeh Kuh. in the Kuh-i-Dudrou Anticline, Lurdigen area, Zagros Mountains, Iran (lat. 31° 20' N, long. 50°48' E).
Type repository: Rolla Missouri; Department of Geology, University of Missouri
Original Description Test small, slightly compressed, almost as long as broad, subtriangular; chambers biserial, increasing in size gradually, slightly inflated in early portion, strongly inflated in later portion; periphery lobate; sutures depressed, less oblique than in other species of genus; wall ornamented with coarse longitudinal costae; primary aperture round, large, at base of last chambers; 1 to 2 obscure accessory apertures along median line. Size: Average length, 0.34 mm.; breadth, 0.26 mm. Extra details from original publication Remarks - Pseudogumbelina leroyi probably is a transitional form between Pseudoguembelina excolata (Cushman) and Pseudoguembelina costulata (Cushman 1938). The subtriangular outline and distinctly lobulate periphery, even in the early stage of biseriality, and the less compressed chambers in the adult stage. separate it from Pseudoguembelina excolata. It differs from Pseudoguembelina costulata in having a pair of semi-globular final chambers, in the distinctly depressed sutures, and in the coarser ornamentation. Some variations were noted, such as loose to closely spaced arrangement of chambers, coarse to fine longitudinal costae, and the shape of the last two chambers, that in some specimens become large and broad along the periphery.
References:
Kavary, E. & Frizzell, D. L. (1964). Upper Cretaceous and lower Cenozoic Foraminifera from west central Iran. Bulletin University of Missouri School of Mines and Metallurgy. 102: 1-89. gs
Pseudoguembelina leroyi compiled by the pforams@mikrotax project teamviewed: 10-12-2024
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