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Chesaconcavus belgradensis

Thecostraca - Balanomorpha - Balanidae

Taxonomy
Concavus belgradensis was named by Zullo (1984). Its type specimen is USNM 348754, an other, and it is a 3D body fossil. Its type locality is Martin Marietta Quarry [Belgrade Fm], which is in a Chattian/Aquitanian offshore shelf limestone in the Belgrade Formation of South Carolina.

It was recombined as Chesaconcavus belgradensis by Zullo (1992).

Sister species lacking formal opinion data
C. gurlarnensis

Synonymy list
YearName and author
1984Concavus belgradensis Zullo p. 1327
1992Chesaconcavus belgradensis Zullo p. 14

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaGravenhorst 1843
subphylumCrustaceaBrünnich 1772
classThecostraca(Gruvel 1905)
RankNameAuthor
subclassCirripedia(Rafinesque 1816)
infraclassThoracica(Darwin 1854)
superorderThoracicalcarea()
orderBalanomorpha(Pilsbry 1916)
superfamilyBalanoideaLeach 1817
familyBalanidaeLeach 1817
subfamilyConcavinae
genusChesaconcavus
speciesbelgradensis()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

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Diagnosis
ReferenceDiagnosis
V. A. Zullo 1984Medium to large, conic to cylindric shell with small, sub-diamond-shaped orifice and prominently costate parietes; radii narrow in conic and broad in cylindric specimens, with oblique summits; basis thick, porous, cup-shaped to cylindric in crowded specimens. Scutum thin, flat, except for re-flexed tergal margin; length of basal margin equal to or greater than height of plate; exterior of scutum ornamented by fine radial striae restricted to central part of plate. Tergum thin, narrow, beaked; tergal spur narrow (30% of basal margin), with its length equal to or exceeding distance of spur from basiscutal angle, and placed slightly scutad of center of basal margin; tergal spur furrow partially infolded, open to apex.
Measurements
No measurements are available
Composition: low Mg calcitef
Grouping: gregariousf
Locomotion: stationaryf
Attached: yesf
Epibiont: yesf
Life habit: epifaunalf
Diet: suspension feederf
Vision: limitedc
Created: 2008-03-04 07:41:07
Modified: 2008-03-04 09:41:07
Source: f = family, c = class
Reference: Kiessling 2004

Age range: Aquitanian or 23.04000 to 20.45000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Chattian - Aquitanian27.3 - 20.45USA (South Carolina) Chesaconcavus belgradensis (type locality: 159935)
Aquitanian23.04 - 20.45USA (North Carolina) Concavus belgradensis (71651)