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Roundyella simplicissima

Ostracoda - Palaeocopida - Scrobiculidae

Taxonomy
Amphissites simplicissimus was named by Knight (1928). It is a 3D body fossil. Its type locality is Knight's locality #37, which is in a Desmoinesian offshore shale in the Henrietta Formation of Missouri. It is the type species of Roundyella.

It was recombined as Roundyella simplicissima by Chen and Bao (1986), Olempska and Blaszyk (1996), Crasquin-Soleau (1997).

Sister species lacking formal opinion data
R. augustai, R. concentrica, R. mopacifa, R. pokornyi, R. reticulata

Synonymy list
YearName and author
1928Amphissites simplicissimus Knight p. 266 figs. Pl 32, fig 11; pl 34, fig 6
1933Amphissites simplicissimus Kellett p. 97 figs. Pl 15, fig 18
1986Roundyella simplicissima Chen and Bao p. 112 figs. Pl 1, figs 1,2
1996Roundyella simplicissima Olempska and Blaszyk p. 14 figs. Pl 4, fig 2
1997Roundyella simplicissima Crasquin-Soleau p. 55 figs. Pl 3, figs 10,11

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaGravenhorst 1843
—Deuteropoda
—Mandibulata
—PancrustaceaZrzavý and Štys 1997
RankNameAuthor
—Hymenostraca(Rolfe 1969)
superclassOligostracaZrzavý et al. 1997
classOstracoda
subclassPodocopaSars 1865
orderPalaeocopidaHenningsmoen 1953
orderLeperditellocopidaAbushik 1990
suborderLeiocopinaSchallreuter 1973
familyScrobiculidaePosner 1951
genusRoundyella
speciessimplicissima(Knight 1928)

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.

†Roundyella simplicissima Knight 1928
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Diagnosis
No diagnoses are available
Measurements
partNmeanminimummaximummedians.d.
shell height20.3830.3500.4200.3850.049
valve height50.4400.3620.5750.4400.082

Composition: low Mg calcitec
Environment: hypersaline, marine, brackish, freshwaterc
Locomotion: actively mobilec
Life habit: epifaunalo
Diet: suspension feedero
Vision: limitedc
Created: 2010-02-06 00:42:06
Modified: 2010-02-23 22:46:12
Source: o = order, c = class
References: Alvarez et al. 2008, Kiessling 2004

Age range: base of the Desmoinesian to the top of the Changhsingian or 312.80000 to 251.90200 Ma

Collections (27 total)


Time interval Ma Country or state Original ID and collection number
Pennsylvanian323.4 - 298.9USA (Texas) Amphissites simplicissimus (210784)
Desmoinesian312.8 - 306.0USA (Missouri) Amphissites simplicissimus (215052 215053)
Gzhelian303.7 - 298.9USA (Kansas) Amphissites simplicissimus (95377 133141 133148 133149)
Sakmarian293.52 - 290.1USA (Kansas) Amphissites simplicissimus (88235 95375)
Artinskian290.1 - 283.3Canada (British Columbia) Roundyella simplicissima (106671)
Artinskian290.1 - 283.3China (Fujian) Roundyella simplicissima (95702)
Artinskian290.1 - 283.3USA (Kansas) Amphissites simplicissimus (110316 110319)
Kungurian283.3 - 274.4China (Fujian) Roundyella simplicissima (95704 95705 95708)
Kungurian283.3 - 274.4China (Jiangsu) Roundyella simplicissima (142185 142186 142187 142188)
Wuchiapingian259.51 - 254.14Svalbard and Jan Mayen Roundyella simplicissima (145692 145693)
Changhsingian254.14 - 251.902China (Fujian) Roundyella simplicissima (121225 121228 121230 121291 121293)