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Terquemia difformis

Bivalvia - Pterioida - Prospondylidea

Taxonomy
Ostrea difformis was named by Schlotheim (1820).

It was recombined as Enantiostreon difforme by Frech (1912) and Gall (1971); it was recombined as Enantiostreon difformis by Awad (1945); it was recombined as Terquemia difformis by Yin and McRoberts (2006).

Sister species lacking formal opinion data
T. multicostata

Synonymy list
YearName and author
1820Ostrea difformis Schlotheim
1912Enantiostreon difforme Frech
1945Enantiostreon difformis Awad
1971Enantiostreon difforme Gall
2006Terquemia difformis Yin and McRoberts p. 112 figs. 6.8-6.11

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
RankNameAuthor
—Eubivalvia
subclassAutobranchia(Groblen 1894)
infraclassPteriomorphia(Beurlen 1944)
orderPterioida
familyProspondylideaPtchelincev 1960
genusTerquemiaTate 1868
speciesdifformis(Schlotheim 1820)

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.

†Terquemia difformis Schlotheim 1820
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Diagnosis
No diagnoses are available
Measurements
partNmeanminimummaximummedians.d.
shell height122.4----
valve height330.227.132.731.12.88

Composition: low Mg calciteo
Composition 2: aragoniteo
Locomotion: stationaryo
Life habit: low-level epifaunalo
Diet: suspension feedero
Vision: blindc
Created: 2004-02-28 12:33:39
Modified: 2009-12-13 03:24:52
Source: o = order, c = class
Reference: Aberhan et al. 2004

Age range: base of the Griesbachian to the top of the Early/Lower Pliensbachian or 251.90200 to 183.00000 Ma

Collections (30 total)


Time interval Ma Country or state Original ID and collection number
Griesbachian251.902 - 250.5Greenland Enantiostreon difforme (48115 118489 118781)
Aegean247.2 - 242.0France (Bas-Rhin) Enantiostreon difforme (206504)
Anisian247.2 - 242.0Germany (Baden-Württemberg) Enantiostreon difforme (66084)
Anisian247.2 - 242.0Egypt (Shamal Sina) Enantiostreon difformis (206058)
Anisian247.2 - 242.0China (Guizhou) Enantiostreon difformis (42277 42284 42368)
Anisian247.2 - 242.0Poland Enantiostreon difforme (33417 33418 33419 33425)
Anisian247.2 - 242.0Germany Enantiostreon difforme (66078 66080)
Anisian247.2 - 242.0Germany (Hessen) Enantiostreon difforme (38545 44357)
Illyrian247.2 - 242.0Germany (Baden-Württemberg) Enantiostreon difforme (67647)
Pelsonian247.2 - 242.0Hungary (Baranya) Enantiostreon difforme (181571)
Pelsonian247.2 - 242.0Germany Enantiostreon difforme (34703)
Middle Triassic247.2 - 237.0Italy (Trento) Terquemia difformis (202271)
Middle Triassic247.2 - 237.0China (Guizhou) Enantiostreon difformis (42278)
Middle Triassic247.2 - 237.0Germany (Bayern) Ostrea difformis (201348 201350)
Ladinian242.0 - 237.0Spain (Sardinia) Enantiostreon difforme (201607)
Ladinian242.0 - 237.0Spain Enantiostreon difforme (121044)
Longobardian242.0 - 235.0Spain (Alicante) Enantiostreon difforme (202223 202240)
Planorbis201.3 - 196.5China (Tibet) Terquemia difformis (73904)
Early/Lower Pliensbachian189.6 - 183.0Germany (Niedersachsen) Terquemia difformis (126923)