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Halonanus declivis

Bivalvia - Arcida - Arcidae

Pectunculus declivis was named by Conrad (1833) [DISTRIBUTION: Eocene; Gulf Coastal Plain.]. It is not a trace fossil.

It was recombined as Limopsis declivis by Conrad (1860); it was recombined as Trigonarca declivis by Dall (1898); it was recombined as Trinacria declivis by Harris (1919); it was recombined as Halonanus declivis by Gardner (1945).

Synonymy list
YearName and author
1833Pectunculus declivis Conrad p. 39
1860Limopsis declivis Conrad p. 297
1898Trigonarca declivis Dall p. 606
1919Trinacria declivis Harris p. 42
1945Halonanus declivis Gardner p. 52

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EubilateriaAx 1987
subclassAutobranchia(Groblen 1894)
infraclassPteriomorphia(Beurlen 1944)
OstreomorphiFerussac 1822
ArcioniGray 1854
orderArcida(Stoliczka 1871)
superfamilyArcoidea(Lamarck 1809)
familyArcidaeLamarck 1809
subfamilyNoetiinaeStewart 1930
genusHalonanusStewart 1930
speciesdeclivis(Conrad 1833)

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.

No diagnoses are available
No measurements are available
Composition: aragonitef
Entire body: yesf
Adult length: 10 to < 100f
Adult width: 10 to < 100f
Adult height: 10 to < 100f
Thickness: intermediatef
Folds: minorf
Ribbing: majorf
Spines: nonef
Internal reinforcement: nonef
Ontogeny: accretionf
Environment: lagoonal, coastal, inner shelf, outer shelf, oceanic, brackish, freshwaterf
Locomotion: facultatively mobilef
Attached: yesf
Life habit: epifaunalf
Diet: suspension feederf
Vision: limitedf
Created: 2008-11-18 16:46:55
Modified: 2010-02-18 01:07:43
Source: f = family
Reference: Mikkelsen and Bieler 2008

Age range: Late/Upper Eocene or 37.20000 to 33.90000 Ma

Collections: one only

Time interval Ma Country or state Original ID and collection number
Late/Upper Eocene37.2 - 33.9USA (South Carolina) Trigonarca declivis (92432)