INVERTEBRATE FOSSILS OF OHIO CAVERNS

AbstractDespite the paleontological relevance of the terrestrial Early Pleistocene Venta Micena bonebed (Baza Basin, Spain), it lacks a comprehensive geochemical/sedimentological study. Here, we demonstrate that the 1.5-m-thick Venta Micena limestone formed in a relatively small freshwater wetland/pond located at the periphery of the large saline Baza paleolake. Two microfacies are observed, with high and low contents of invertebrate fossils, and which originated in the centre and margin of the wetland, respectively. X-ray diffraction (XRD) mineralogy and paleohydrological characterization based on ostracod and bulk-rock geochemistry (δ13C and δ18O) indicate that the limestone reflects a general lowstand of the Baza lake, permitting the differentiation of freshwater wetlands that were fed by adjacent sources. Conversely, during highstands, the Baza lake flooded the Venta Micena area and the freshwater fauna was replaced by a saline one. Bulk-rock isotopic data indicate that the lower interval C1 of the limestone (bone-rich in marginal settings) displays general negative values, while the upper interval C2 (bone free) displays less negative values. The bones of predated mammals accumulated in the marginal areas, which were flooded and buried by recurring water-table fluctuations. Lake dynamics played a critical role in bone accumulation, which was previously considered as representing a hyena den.

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An enigmatic cap-shaped fossil from the Middle Cambrian of North Greenland

Bulletin Grønlands Geologiske Undersøgelse ◽

10.34194/bullggu.v169.6729 ◽

1994 ◽

Vol 169 ◽

pp. 149-155

Author(s):

J.S Peel

Keyword(s):

New Zealand ◽

Systematic Position ◽

Middle Cambrian ◽

The Family ◽

New Form ◽

Invertebrate Fossils ◽

North Greenland

Nyeboeconus robisoni gen. et sp. nov., is described from the Middle Cambrian Henson Gletscher Formation of western North Greenland. Some authors have interpreted similar shelIs as chondrophorine hydrozoans or invertebrate fossils of uncertain systematic position. The coiled, cap-shaped shell and the presence of an internal plate, or pegma, suggest, however, that this new form is the second genus to be described of the Family Enigmaconidae MacKinnon, 1985 (Mollusca, Class Helcionelloida), otherwise known only from rocks of similar age in New Zealand.

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Collection transfer

Journal of Paleontology ◽

10.1017/s0022336000036908 ◽

1993 ◽

Vol 67 (3) ◽

pp. 446-446

Keyword(s):

Natural History ◽

Smithsonian Institution ◽

National Museum ◽

Type Specimens ◽

Princeton University ◽

Entire Collection ◽

University Department ◽

Fine Collection ◽

Invertebrate Fossils ◽

Taxonomic Order

I he National Museum of Natural History (Smithsonian Institution), Department 01 Paleobiology, recently received the collection of invertebrate fossils (except Insecta and Patagonia material) formerly housed in the Princeton University, Department of Geological and Geophysical Sciences. This fine collection contains approximately 70,000 specimens; type and nontype specimens were stored together in taxonomic order. Current documentation for the entire collection consists of a card catalogue. Following curation, the specimens will be housed taxonomically in standing type and nontype collections. Lists of type specimens received will be published as they are isolated. Borrowers should return specimens to the Department of Paleobiology, National Museum of Natural History, upon completion of loans.

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Invertebrate Fossils. Raymond C. Moore, Cecil G. Lalicker, and Alfred G. Fischer. New York-London: McGraw-Hill, 1952. 766 pp. Illus. $12.00

Science ◽

10.1126/science.117.3042.431-a ◽

1953 ◽

Vol 117 (3042) ◽

pp. 431-431

Author(s):

G. W. SINCLAIR

Keyword(s):

New York ◽

Invertebrate Fossils

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Invertebrate Fossils (Insecta: Trichoptera, Diptera, Coleoptera) from the Pleistocene Scarborough Formation at Toronto, Ontario, and their paleoenvironmental Significance

Quaternary Research ◽

10.1016/0033-5894(81)90042-9 ◽

1981 ◽

Vol 16 (2) ◽

pp. 146-166 ◽

Cited By ~ 33

Author(s):

Nancy E. Williams ◽

John A. Westgate ◽

D. Dudley Williams ◽

Anne Morgan ◽

Alan V. Morgan

Keyword(s):

Feeding Habits ◽

Climatic Conditions ◽

Deciduous Species ◽

Forest Environment ◽

Southern Ontario ◽

Plant Remains ◽

The Mean ◽

Terrestrial Insects ◽

Invertebrate Fossils ◽

July Temperature

AbstractLarval caddisfly, chironomid, and beetle remains have been recovered from the Pleistocene Scarborough Formation in the Toronto region of southern Ontario. Three stratigraphic levels were sampled at the northeastern end of the Scarborough Bluffs; the youngest horizon yielded 16 chironomid taxa, 33 caddisfly taxa, and 28 beetle taxa, whereas the two older levels yielded somewhat less diverse assemblages. Only one taxon in each of the caddisfly and chironomid groups was identified from the presumed correlative beds at Woodbridge, Ontario, but numerous beetle fragments were recovered, several of which have been specifically identified and match species found previously in the upper part of the Scarborough Formation. The youngest sampled assemblage in the Scarborough Formation at the northeastern end of the Scarborough Bluffs is interpreted as indicating cool climatic conditions in a boreal forest environment, given the present-day distributions and feeding habits of these river, lake, and terrestrial taxa. The mean July temperature at this time was probably about 15°C, as compared to the present-day value of 20.5°C. The forest was poorer in deciduous species during deposition of the older part of the formation as preserved here. These results agree well with previous interpretations based on plant remains. We suggest that both aquatic and terrestrial insects are good indicators of macroclimate.

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