pforams@mikrotax - Conoglobigerinidae

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Conoglobigerinidae

Classification: pf_mesozoic -> Conoglobigerinidae
Sister taxa: Guembelitriidae, Heterohelicidae, Planomalinidae, Globigerinelloididae, Schackoinidae, Conoglobigerinidae, Chilostomellidae, Favusellidae, Praehedbergellidae, Hedbergellidae, Rugoglobigerinidae, Rotaliporidae, Globotruncanidae, hidden,

Daughter taxa: (blue => in age window 0-800Ma)		Granddaughter taxa
	Conoglobigerina Chambers of the last whorl strongly embrace previous whorls; irregularly reticulate wall surface pattern	C. caucasica C. grigelisi C. gulekhensis C. helvetojurassica C. sp.
	Globuligerina Wall smooth or pustulose but without reticulate pattern	G. avariformis G. balakhmatovae G. bathoniana G. dagestanica G. jurassica G. oxfordiana G. oxfordiana calloviensis G. tojeiraensis G. sp.

Taxonomy

Citation: Conoglobigerinidae Simmons et al. 1997

Rank: Family

Original description: Those genera of the Favusellacea which do not possess a favose surface structure of fused pseudomuricae forming an anastomosing reticulation.

Entries in the Catalog of original descriptions: Conoglobigerinidae

Distinguishing features: Small (<200µm), microperforate wall, 3-4 globose chambers in final wall, aperture umbilical

Geological Range:
Last occurrence (top): within Valanginian Stage (133.88-139.39Ma, top in Valanginian stage). Data source: Total of range of species in this database
First occurrence (base): within Bajocian Stage (168.28-170.30Ma, base in Bajocian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: pf_mesozoic

Character matrix

test outline:	Lobate	chamber arrangement:	Trochospiral	edge view:	Spiroconvex	aperture:	Umbilical
sp chamber shape:	Globular	coiling axis:	Low-moderate	periphery:	N/A	aperture border:	-
umb chbr shape:	Globular	umbilicus:	-	periph margin shape:	Broadly rounded	accessory apertures:	None
spiral sutures:	Moderately depressed	umb depth:	-	wall texture:	Finely pustulose	shell porosity:	Microperforate: <1µm
umbilical or test sutures:	Moderately depressed	final-whorl chambers:	0.0-0.0	N.B. These characters are used for advanced search. N/A - not applicable

References:

Simmons, M. D., Boudagher-Fadel, M. K., Banner, F. T. & Whittaker, J. E. (1997). The Jurassic Favusellacea, the earliest Globigerina. In, Boudagher-Fadel, M. K. , Banner, F. T. & Whittaker, J. E. (eds) The Early Evolutionary History of Planktonic Foraminifera. British Micropaleontological Society Series. 17-30. gs