PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Idas

Bivalvia - Mytilida - Mytilidae

Taxonomy

Idas was named by Jeffreys (1876). It is extant.

It was assigned to Mytilidae by Kiel and Goedert (2007), Kiel and Amano (2013).

Species

I. argenteus, I. olympicus, I. tauroparva, Idasola bakeri

Synonyms

Idasola was named by Iredale (1915) [Sepkoski's age data: T Mi-m R Sepkoski's reference number: 1112]. It is extant.

It was synonymized subjectively with Idas by Spencer et al. (2004).

It was assigned to Modiolinae by Moore (1983); to Mytiloida by Sepkoski (2002); and to Mytilidae by Vokes (1980), Lamprell and Healy (1998), Mikkelsen (2006).

Synonymy list

Year	Name and author
1876	Idas Jeffreys
1915	Idasola Iredale
1980	Idasola Vokes p. 24
1983	Idasola Moore p. A78
1998	Idasola Lamprell and Healy p. 86
2002	Idasola Sepkoski
2006	Idasola Mikkelsen
2007	Idas Kiel and Goedert p. 47
2013	Idas Kiel and Amano p. 598

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia

Rank	Name	Author
subclass	Autobranchia	(Groblen 1894)
infraclass	Pteriomorphia	(Beurlen 1944)
—	Mytilomorphi	Ferussac 1822
order	Mytilida	(Rafinesque 1815)
superfamily	Mytiloidea	Rafinesque 1815
family	Mytilidae	Rafinesque 1815
subfamily	Modiolinae	(Termier and Termier 1950)
genus	Idas	Jeffreys 1876

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.

G. Idas Jeffreys 1876

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Idas argenteus Jeffreys 1876

†Idas olympicus Kiel and Goedert 2007

†Idas tauroparva Sacco 1898

Invalid names: Idasola Iredale 1915 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitef

Composition 2:

low Mg calcitef

Entire body:

yesf

Adult length:

10 to < 100f

Adult width:

10 to < 100f

Adult height:

10 to < 100f

Thickness:

intermediatef

Folds:

nonef

Ribbing:

minorf

Spines:

nonef

Internal reinforcement:

nonef

Ontogeny:

accretionf

Environment:

lagoonal, coastal, inner shelf, outer shelf, oceanic, brackish, freshwaterf

Locomotion:

stationarysubf

Attached:

yessubf

Epibiont:

yessubf

Life habit:

semi-infaunalsubf

Diet:

suspension feedersubf

Vision:

blindc

Created:

2009-04-13 10:58:18

Modified:

2009-04-13 12:58:18

Source: subf = subfamily, f = family, c = class

References: Aberhan et al. 2004, Hendy et al. 2009, Kiessling 2004

Age range

Maximum range based only on fossils: base of the Paleocene to the top of the Messinian or 66.00000 to 5.33300 Ma
Minimum age of oldest fossil (stem group age): 56.0 Ma

Collections (15 total)

Time interval	Ma	Country or state	Original ID and collection number
Paleocene	66.0 - 56.0	USA (California)	Modiolus bakeri (190778)
Priabonian	37.71 - 33.9	USA (Washington)	I. olympicus (205039) I. sp. (205200)
Priabonian - Rupelian	37.71 - 27.3	USA (Washington)	I. olympicus (205035)
Early/Lower Oligocene	33.9 - 27.3	USA (Washington)	I. olympicus (205036)
Rupelian	33.9 - 27.3	USA (Washington)	I. olympicus (205033 205037) I. sp., I. olympicus (58964) Idasola sp. (45805)
Oligocene	33.9 - 23.04	USA (Washington)	I. olympicus (205034)
Chattian	27.3 - 23.04	USA (Washington)	I. olympicus (160141 194068) Idasola sp. (45809)
Chattian - Aquitanian	27.3 - 20.45	USA (Washington)	I. olympicus (205038)
Tortonian - Messinian	11.63 - 5.333	Italy	I. tauroparva (200115)