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Concavus concavus

Thecostraca - Balanomorpha - Balanidae

Taxonomy
Balanus concavus was named by Bronn (1831). It is a 3D body fossil. Its type locality is Valleandona, which is in a Zanclean marine sandstone in the Valldunga Formation of Italy. It is the type species of Concavus.

It was recombined as Concavus concavus by Zullo (1992).

Synonymy list
YearName and author
1831Balanus concavus Bronn
1904Balanus concavus Martin p. 94
1967Balanus concavus Ross and Newman p. 18
1992Concavus concavus Zullo p. 5

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaLatreille 1829
—Deuteropoda
—Mandibulata
—PancrustaceaZrzavý and Štys 1997
subphylumCrustaceaBrünnich 1772
RankNameAuthor
classThecostraca(Gruvel 1905)
subclassCirripedia(Rafinesque 1816)
infraclassThoracica(Darwin 1854)
superorderThoracicalcarea()
orderBalanomorpha(Pilsbry 1916)
superfamilyBalanoideaLeach 1817
familyBalanidaeLeach 1817
subfamilyConcavinae
genusConcavusNewman 1982
speciesconcavus(Bronn 1831)

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.

†Concavus concavus Bronn 1831
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†Balanus concavus proteus Conrad 1834
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Diagnosis
ReferenceDiagnosis
V. A. Zullo 1992Shell moderately large, conic to sub-cylindric; parietes irregularly plicate, or with low, narrow, regularly spaced ribs; orifice toothed, moderately large, subdiamond-shaped; radii moderately broad with oblique summits; scutum narrow, bowed between apex and basal margin; exterior of scutum nodose except for nonstriate or lightly striate occludent segment; narrow tergal segment of scutum inflected about70?; basitergal angle very slightly truncate; scutal adductor ridge short, separated by narrow groove from articular ridge; lateral depressor ridge low, sharp; tergum narrow, with incipient beak; exterior of tergum radially striate; tergal spur furrow usually narrowly open, occasionally closed; tergal spur long, slightly less than one-third length of tergum, occupying about one-fourth of basal margin, and usually placed a distance less than its own width from basiscutal angle.
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: base of the Late/Upper Oligocene to the top of the Late/Upper Pleistocene or 27.30000 to 0.01170 Ma

Collections (61 total)


Time interval Ma Country or state Original ID and collection number
Oligocene33.9 - 23.04Slovenia Balanus concavus (87472)
Late/Upper Oligocene27.3 - 23.04Colombia (La Guajira) Balanus concavus (42770)
Early/Lower Miocene23.04 - 15.98USA (California) Balanus concavus (206370)
Early/Lower Miocene23.04 - 15.98Mexico (Baja California Sur) Balanus concavus (43811)
Early/Lower Miocene - Middle Miocene23.04 - 11.63Mexico (Baja California Sur) Balanus concavus (43804)
Miocene23.04 - 5.333USA (Maryland) Balanus concavus (125939)
Burdigalian20.45 - 15.98USA (Maryland) Balanus concavus (79101 79102)
Langhian15.98 - 13.82France (Aquitaine Region) Balanus concavus (31316 31326)
Serravallian13.82 - 11.63USA (Maryland) Balanus concavus (60376 70832 70846 70854 70855 79104 79105 79106 79107 79108 79110 79111 79112 79113 79114 79115 79352 79353)
Tortonian11.63 - 7.246USA (Maryland) Balanus concavus (70851)
Tortonian11.63 - 7.246Madagascar Balanus concavus (51586)
Tortonian11.63 - 7.246Panama (Colon) Balanus concavus (145567)
Late/Upper Miocene11.63 - 5.333Haiti Balanus concavus (60105 60106 60111)
Messinian7.246 - 5.333Algeria Balanus concavus (69864)
Early/Lower Pliocene5.333 - 3.6USA (Florida) Balanus concavus (35026 41496)
Early/Lower Pliocene5.333 - 3.6USA (California) Balanus concavus (206368 216913 220185)
Zanclean5.333 - 3.6Italy Concavus concavus (160179)
Zanclean5.333 - 3.6Italy (Asti) Concavus concavus (type locality: 86305)
Pliocene5.333 - 2.58USA (California) Balanus concavus (194664 216872 216902)
Pliocene5.333 - 2.58Mexico (Baja California Sur) Balanus concavus (43682 43686)
Pliocene5.333 - 2.58Mexico (Baja California) Balanus concavus (97126 97127)
Pliocene5.333 - 2.58USA (Florida) Balanus concavus (146872)
Piacenzian3.6 - 2.58USA (Florida) Balanus concavus (32039)
Late/Upper Pliocene - Early/Lower Pleistocene3.6 - 0.774USA (California) Balanus concavus (217009)
Middle Pleistocene0.774 - 0.129USA (California) Balanus concavus (207886 222664)
Middle Pleistocene - Late/Upper Pleistocene0.774 - 0.0117Morocco Balanus concavus (127571 127585)
Late/Upper Pleistocene0.129 - 0.0117USA (California) Balanus concavus (96895 222659 222660 222661 222662)