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Promyalina schamarae

Bivalvia - Myalinida - Myalinidae

Synonymy list
YearName and author
1899Myalina schamarae Bittner p. 19 figs. pl. 4, figs 20–25.
1976Myalina schamarae Bychkov et al.
1978Promyalina schamarae Xu p. 319 figs. Pl 104, fig 23
1985Promyalina schamarae Kurushin p. 62 figs. Pl 11, figs 2-7
1996Promyalina schamarae Dagis et al. p. 29 figs. Pl 4, figs 16-19
2009Promyalina schamarae Kumagae and Nakazawa p. 157 figs. 144.2-144.3
2017Promyalina schamarae Foster et al. p. 854 fig. 2C–G

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
Eubivalvia
subclassAutobranchia(Groblen 1894)
RankNameAuthor
infraclassPteriomorphia(Beurlen 1944)
OstreomorphiFerussac 1822
OstreioniFerussac 1822
MyalinataPaul 1939
orderMyalinidaPaul 1939
superfamilyAmbonychioidea(Miller 1877)
familyMyalinidaeFrech 1891
genusPromyalina
speciesschamarae()

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
W. J. Foster et al. 2017Shell is small, mytiliform, inequilateral, prosocline, higher than long, and moderately inflated. Umbo is small, terminal and prosogyrate. Posterior dorsal margin is straight. Posterior margin is slightly convex, forming a rounded posteroventral margin. Anterior margin is long, nearly straight or weakly acute and partly depressed near the umbo.
Measurements
partNmeanminimummaximummedians.d.
shell height325.917.432.830.38.26
valve height1320.214.227.922.84.84

Composition: aragonitec
Locomotion: facultatively mobilesubc
Life habit: epifaunalsubc
Diet: suspension feedersubc
Vision: blindc
Created: 2014-02-09 11:13:23
Modified: 2014-02-09 11:13:23
Source: subc = subclass, c = class
References: Eaton 1871, Aberhan et al. 2004

Age range: base of the Dienerian to the top of the Griesbachian or 252.17000 to 251.30000 Ma

Collections (88 total)


Time interval Ma Country or state Original ID and collection number
Changhsingian - Griesbachian254.17 - 251.3China (Yunnan) Promyalina schamarae (205965 205967 205968)
Changhsingian - Griesbachian254.17 - 251.3China (Guizhou) Promyalina schamarae (205986 205987 205988 205989 205992 205993)
Dienerian252.17 - 251.3Russian Federation Promyalina schamarae (90209 102212 107027 107101)
Dienerian252.17 - 251.3Greenland Myalina schamarae (118493 118670 118735)
Griesbachian252.17 - 251.3China (Guizhou) Promyalina schamarae (151147 151148 151149 205960 205991 205994 205995 205997 205998 205999)
Griesbachian252.17 - 251.3Svalbard and Jan Mayen Promyalina schamarae (182611 182612)
Griesbachian252.17 - 251.3Greenland Myalina schamarae (48058 48059 112718 112722 112756 118489 118491 118492 118501 118505 118506 118510 118512 118513 118514 118517 118522 118523 118526 118527 118539 118564 118566 118570 118573 118576 118577 118591 118592 118596 118600 118607 118608 118609 118611 118620 118627 118628 118650 118664 118677 118684 118697 118699 118703 118711 118729 118730 118756 118784)
Griesbachian252.17 - 251.3Russian Federation Promyalina schamarae (90207)
Induan252.17 - 251.2China (Chongqing) Promyalina schamarae (123717)
Induan252.17 - 251.2Russian Federation Promyalina schamarae (136037 136040 136045 136049 136052 136053)
Early/Lower Triassic252.17 - 247.2Russian Federation (Primorsky Krai) Myalina schamarae (202937 202940)