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Hemipatagus

Echinoidea - Spatangoida - Loveniidae

Synonyms
Synonymy list
YearName and author
1858Hemipatagus Desor
1887Hemipatagus ficheuri Pomel
1915Hemipatagus Clark and Twitchell p. 150
1942Hemipatagus Cooke p. 52
1953Hemipatagus Hassan p. 15
2007Hemipatagus Kroh p. 173

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
classEchinoidea()
subclassEuechinoideaBronn 1860
RankNameAuthor
superorderAcroechinoidea()
Carinacea
Irregularia()
Atelostomata
orderSpatangoida
suborderBrissidina
superfamilySpatangidea
familyLoveniidae
genusHemipatagusDesor 1858

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.

Diagnosis
ReferenceDiagnosis
A. Kroh 2007Cordiform spatangoid differing from other loveniids by its (1) heterogeneous aboral tubercula- tion with large crenulate or non-crenulate primary tubercles (Table 1); (2) conspicuous aboral primary tubercles in interambulacra 1–4, but missing in interambulacrum 5 and the posterior part of interambulacral columns 1a and 4b (see Table 1); (3) strongly sunken areoles or even the presence of camellae in some species; (4) presence of a subanal fasciole in adult specimens, which is strongly bilobed (Figs 2A, B); (5) presence of a conspicuous field of coarse tubercles adjacent to adapical ambulacrum III in interambulacral columns 2b and 3a (Pl. 3, figs 3–5); (6) strong constriction of ambulacra II and IV near the margin on the oral side in adult specimens (Figs 3A, B); (7) moderately elongated labral plate not extending beyond the second ambulacral plates (Figs 3A, B); (8) prominent oral tubercles arranged in distinct rows, in some species with deeply sunken areoles and helically spiralled parapet (e.g. Pl. 3, fig. 7); (9) three to four ambulacral plates extending into the subanal fasciole in ambulacrum I and V, respectively.
Measurements
No measurements are available
Composition: high Mg calciteo
Ontogeny: accretion, addition of partsp
Environment: marineo
Locomotion: slow-movingo
Life habit: shallow infaunalo
Diet: deposit feedero
Diet 2: detritivoreo
Vision: limitedc
Dispersal: watero
Dispersal 2: planktonico
Created: 2004-02-28 12:18:10
Modified: 2009-10-08 16:32:56
Source: o = order, c = class, p = phylum
References: Kiessling 2004, Aberhan 1992

Age range

Maximum range based only on fossils: base of the Lutetian to the top of the Badenian or 47.80000 to 12.70000 Ma
Minimum age of oldest fossil (stem group age): 41.3 Ma

Collections (18 total)


Time interval Ma Country or state Original ID and collection number
Lutetian47.8 - 41.3USA (Mississippi) H. arguta (155927) Maretia arguta (99668)
Bartonian41.3 - 38.0USA (Mississippi) Maretia arguta (100142 101182)
Bartonian41.3 - 38.0USA (North Carolina) H. subrostratus (5436)
Late/Upper Eocene37.2 - 33.9USA (Mississippi) H. argutus (142843)
Late/Upper Eocene37.2 - 33.9USA (North Carolina) H. subrostratus (142965)
Whaingaroan34.3 - 27.3New Zealand Lovenia tuberculata (155806)
Chattian28.1 - 23.03New Zealand (North Island) Lovenia tuberculata (205950)
Duntroonian27.3 - 25.2New Zealand (N. W. Nelson) Lovenia tuberculata (13100)
Early/Lower Miocene - Middle Miocene23.03 - 11.608Greenland H. sp. (88284)
Burdigalian - Langhian20.44 - 13.82Italy (Sardinia) H. sp. (187430 187431)
Altonian19.0 - 15.9New Zealand Lovenia tuberculata (155838 155840 155841 155842)
Badenian13.65 - 12.7Belgium H. ocellatus (95167)