Collections of Willy A. Mohler

About Willy A. Mohler (1911-2008).
Micropaleontologist at N.V. Batafsche Petroleum (Shell). Studies in Balikpapan (Borneo), Bandung (Java), Caracas & Maracaibo (Venezuela).
 
 
Publications:
 
 
 
 
Collections:
Mohler, W.A. (1938). [Dissertation]
Willy A. Mohler's (1939-1940) systematic collection of foraminifera.
Mohler, W.A. (1946 a, b, and c).
 
 

 

 

 
 
 
 
 
 
 
 
 
 
Type- and reference collection to Mohler, W.A. (1938). Mikropaläontologische Untersuchungen in der nordschweizerischen Juraformation. Abhandlungen der Schweizerischen Paläontologischen Gesellschaft, 60:1-53, plates 1-4.
 
This is the material to the PhD dissertation of Willy Mohler. It includes thin sections, washed residues, rock samples and isolated microfossils in Fema cells, that are illustrated in the publication.
Holotypes to:
 
Ammobaculites coprolithiformis (Schwager) var. sequana Mohler (1938)
Nautiloculina oolithica Mohler (1938); Generotype
Pseudocyclammina sequana (Merian) var. major Mohler (1938)
Pseudocyclammina sequana (Merian) var. minor Mohler (1938)

 

 
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Reference collection to Mohler, W.A. (1946a). Sigmoilina personata n. sp., eine Leitform aus dem Eocaen von Südost-Borneo und Java. Eclogae geologicae Helvetiae, vol. 39 (1946), pp. 298-300. Xerox copy deposited with the collection.
 
Small collection containing the Holotype (fixed) and paratypes (loose specimens) in a Fema-cell, and isolated specimens of S. personata (also in fema cells) from other locations.
Holotype:
Sigmoilina personata Mohler (1946)

 

 
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Type collection to Mohler, W.A. (1946b). Lepidocyclina crucifera n. sp., aus dem Burdigalien von Ost-Borneo. Eclogae geologicae Helvetiae, vol. 39 (1946), pp. 302-309, Xerox copy deposited with the collection.
Holotype (?)
Lepidocyclina crucifera Mohler (1946)

 

 
A single thin section containing Lepidocyclina crucifera Mohler (1946), from "S. Mandai, Stromgebiet des S. Birang, Borneo" and bearing the label B63, which is described as the reference specimen in the article. It may represent the Holotype specimen, but comparison with the illustrated figures shows, however, that the figured sections do not precisely correspond to the section in the slide (different sectioning planes ?).
 
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[Specimen not found yet]. Collection to Mohler, W.A. (1946c). Ueber das Vorkommen von Trocholina Paalzow in der Unterkreide von West-Borneo. Eclogae geologicae Helvetiae, vol. 39 (1946), pp. 300-302, Xerox copy deposited with the collection.
 
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Type- and reference collection to Mohler, W.A. (1949a). Flosculinella reicheli n. sp. aus dem Tertiär e5 von Borneo. Eclogae geologicae Helvetiae, vol. 42(2): 521-527.
 
Small collection containing the Holotype of Flosculinella reicheli n. sp. (isolated specimen in Fema-cell, specimen number B. 328), several Fema-cells and thin-sections with isolated Flosculinella specimens from SE Borneo. A xerox copy of the article is with the collection.
Holotype:
Flosculinella reicheli Mohler

 

 
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[No collection found yet]. Mohler, W.A. (1949b). Das Alter des Eozän-Kalkes von Gunung Gamping westlich Djokjakarta, Java. Eclogae geologicae Helvetiae, vol. 42(2): 519-521.
 
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Willy A. Mohler's systematic collection of foraminifera, prepared in 1939-1940.
 
A fine teaching- and training collection of isolated benthic and planktic foraminifera important in biostratigraphy and/or for paleoenvironmental reconstructions and covering the Cretaceous, Tertiary and Quaternary (in Fema cells or small amounts of washed residues). A large portion of the collection representing major taxonomic foraminiferal groups like miliolids, alveolinids, lagenids, Buliminidae, Rotaliidae, nummulites, Operculina, Assilina, Heterostegina, Spiroclypeus, Cycloclypeus, Lepidocyclina (with thin sections), Miogypsinidae, Discocyclinidae, agglutinated forams, Globigerinidae, Globorotaliidae, and globotruncanids).
The majority of samples were collected from sections or oil exploration holes in Borneo between 1939 and 1940, but others come also from Misol, New Guinea, and the Sinai.
 
There is no special documentation about this collection. However, the book by R. Elizabeth Migliore (2004). Evening Flower, where the growth of Willy Mohler's systematic collection of foraminifera is mentioned, is deposited alongside the collection.
 
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