Acarinina aspensis


Classification: pf_cenozoic -> Truncorotaloididae -> Acarinina -> Acarinina aspensis
Sister taxa: A. medizzai, A. collactea, A. pentacamerata, A. aspensis, A. interposita, A. echinata, A. pseudosubsphaerica, A. alticonica, A. soldadoensis, A. cuneicamerata, A. angulosa, A. africana, A. sibaiyaensis, A. esnehensis, A. mckannai, A. subsphaerica, A. bullbrooki, A. punctocarinata, A. boudreauxi, > >>

Taxonomy

Citation: Acarinina aspensis (Colom 1954)
Rank: Species
Basionym: Globigerina aspensis
Synonyms:
Taxonomic discussion: In comparison to Acarinina pentacamerata, A. aspensis is characterized by an increase in the number of chambers in the final whorl, a more evolute spire and concomitant increase in the width of the umbilicus. This form was originally described from the lower Eocene of Spain, at which time a large number of specimens were illustrated but no holotype designated. Blow (1979, p. 909) designated the specimen illustrated by Colom (1954, pl. 3: fig. 16, reillustrated on Pl. 9.4, Fig. 1) as a lectotype, perpetuating the taxonomic concept of this form established by Bolli (1957a, p. 167-168, pl. 37, figs. 18a-c). [Berggren et al. 2006]

Catalog entries: Globigerina aspensis, Acarinina pentacamerata acceleratoria, Globigerina colomi

Type images:

Distinguishing features: Numerous (6-8; rarely 9-10) chambers in final whorl; large and widely open umbilicus

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description


Diagnostic characters: This taxon is distinguished by its large and widely open umbilicus and high but variable number (6-8; rarely to 10) of chambers in the last whorl. [Berggren et al. 2006]

Wall type: Normal perforate, non-spinose with coarse muricae. [Berggren et al. 2006]

Test morphology: Low trochospiral, variable number of subglobular chambers (ranging from 6-8, rarely to 10) in last whorl; intercameral sutures radial, moderately depressed between weakly embracing chambers; umbilicus deep, wide as a result of relatively lax/evolute coiling, no circum-umbilical concentration of muricae; 2-2½ whorls on spiral side; intercameral sutures weakly recurved between early chambers, straight, radial between later chambers; rounded periphery in edge view with no evidence of circumperipheral concentration of muricae; aperture interiomarginal, umbilical-extraumbilical, extending to peripheral margin in last chamber. [Berggren et al. 2006]

Size: Dimensions of holotype unknown; this is, however, a relatively large form that can exceed 0.5 mm in maximum diameter. [Berggren et al. 2006]

Character matrix

test outline:Subcircularchamber arrangement:Trochospiraledge view:Inequally biconvexaperture:Umbilical-extraumbilical
sp chamber shape:Inflatedcoiling axis:Lowperiphery:N/Aaperture border:N/A
umb chbr shape:Inflatedumbilicus:Wideperiph margin shape:Broadly roundedaccessory apertures:None
spiral sutures:Moderately depressedumb depth:Deepwall texture:Moderately muricateshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:6.0-10.0 N.B. These characters are used for advanced search. N/A - not applicable

Biogeography and Palaeobiology


Geographic distribution: Widespread in (sub)tropical regions of the world; not reliably reported (to our knowledge) from austral or boreal regions. [Berggren et al. 2006]
Aze et al. 2011 summary: Low latitudes; based on Berggren et al. (2006b)

Isotope paleobiology: No data available. [Berggren et al. 2006]
Aze et al. 2011 ecogroup 1 - Open ocean mixed-layer tropical/subtropical, with symbionts. Based on very heavy δ13C and relatively light δ18O. Sources cited by Aze et al. 2011 (appendix S3): this study

Phylogenetic relations: Bolli (1957b, p. 167) suggested derivation of aspensis from angulosa. Berggren (1964) and Blow (1979) suggested instead that it evolved from pentacamerata, a view which we uphold here. [Berggren et al. 2006]

Most likely ancestor: Acarinina pentacamerata - at confidence level 4 (out of 5). Data source: Berggren et al. (2006) fig9.2.

Biostratigraphic distribution

Geological Range:
Notes: Confirmed occurrences only in the lower part of Zone E7. Our studies suggest that aspensis may prove to be a very useful biostratigraphic marker. Some previous authors, since Bolli (1957b, p. 167) have probably confused aspensis with cuneicamerata and hence suggested a much longer stratigraphic range, into the middle Eocene (see also Berggren 1977, p. 259 and Blow, 1979, p. 911). [Berggren et al. 2006]
Last occurrence (top): in mid part of E7a subzone (50% up, 49.3Ma, in Ypresian stage). Data source: Eocene Atlas
First occurrence (base): at base of E7a subzone (0% up, 50.2Ma, in Ypresian stage). Data source: Eocene Atlas

Plot of occurrence data:

Primary source for this page: Berggren et al. 2006 - Eocene Atlas, chap. 9, p. 264

References:

Berggren, W. A. (1964). The Maestrichtian, Danian and Montian stages and the Cretaceous-Tertiary boundary. Stockholm Contributions in Geology. 11(5): 103-176. gs :: ::

Berggren, W. A. (1977a). Atlas of Palaeogene Planktonic Foraminifera: some Species of the Genera Subbotina, Planorotalites, Morozovella, Acarinina and Truncorotaloides. In, Ramsay, A. T. S. (ed.) Oceanic Micropaleontology. Academic Press, London 205-300. gs :: ::

Berggren, W. A., Pearson, P. N., Huber, B. T. & Wade, B. S. (2006b). Taxonomy, biostratigraphy, and phylogeny of Eocene Acarinina. In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 9): 257-326. gs :: ::

Bermudez, P. J. (1961). Contribucion al estudio de las Globigerinidea de la region Caribe-Antillana (Paleoceno-Reciente). Editorial Sucre, Caracas. 1119-1393. gs :: ::

Blow, W. H. (1979). The Cainozoic Globigerinida: A study of the morphology, taxonomy, evolutionary relationships and stratigraphical distribution of some Globigerinida (mainly Globigerinacea). E. J. Brill, Leiden. 2: 1-1413. gs :: ::

Bolli, H. M. (1957a). Planktonic foraminifera from the Eocene Navet and San Fernando formations of Trinidad. In, Loeblich, A. R. , Jr. , Tappan, H. , Beckmann, J. P. , Bolli, H. M. , Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 155-172. gs :: ::

Colom, G. (1954). Estudio de las biozonas con foraminiferos del Terciario de Alicante. Boletin del Instituto Geologico y Minero de Espana. 66: 1-279. gs :: ::

Hillebrandt, A. , von (1965). Los foraminiferos planctonicos, nummulitidos y coccolitoforidos de la zona de Globorotalia palmerae del Cuisiense (Eoceno Inferior) en el SE de España, (provincias de Murcia y Alicante). Revista Española de Micropaleontología. 8: 323-394. gs :: ::

Khalilov, D. M. (1956). 0 pelagicheskoy faune foraminifer Paleogenovykh otlozheniy Azerbaydzhana [Pelagic Foraminifera of the Paleogene Deposits of the Azerbaizhan SSR]. Trudy Instituta Geologii, Akademiya Nauk Azerbaidzhanskoi SSR. 17: 234-255. gs :: ::

Lu, G. & Keller, G. (1995). Planktic foraminiferal faunal turnovers in the subtropical Pacific during the Late Paleocene to Early Eocene. Journal of Foraminiferal Research. 25: 97-116. gs :: ::

Poag, C. W. & Commeau, J. A. (1995). Paleocene to middle Miocene planktic foraminifera of the southwestern Salisbury Embayment, Virginia and Maryland: Biostratigraphy, allostratigraphy, and sequence stratigraphy. Journal of Foraminiferal Research. 25: 134-155. gs :: ::

Postuma, J. A. (1971). Manual of planktonic foraminifera. Elsevier for Shell Group, The Hague. 1-406. gs :: ::

Samuel, O. & Salaj, J. (1968). Microbiostratigraphy and Foraminifera of the Slovak Carpathian Paleogene. Geologicky Ustav Dionyza Stura, Bratislava. 1-232. gs :: ::


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Acarinina aspensis compiled by the pforams@mikrotax project team viewed: 2-6-2020

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