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Hedstroemina fragilis

Strophomenata - Strophomenida - Rafinesquinidae

Taxonomy
Hedstroemina fragilis was named by Bancroft (1929) [= ?1883 Strophomena Callawayiana Davidson, p. 193, pl. 16, figs 6–7. Lectotype selected by Cocks (1978, p. 112)]. Its type specimen is BB 14380, a shell (ventral internal mould), and it is a 3D body fossil. It is the type species of Hedstroemina.

Synonyms
  • Hedstroemina parva was named by Bancroft (1929) [lectotype selected by Cocks (1978, p. 112).]. Its type specimen is BB 14385, a valve (ventral internal mould), and it is a 3D body fossil.

    It was synonymized subjectively with Hedstroemina fragilis by Cocks (2010).
  • Strophomena callawayiana was named by Davidson (1883) [Strophomena Callawayiana].

    It was recombined as Dactylogonia callawayiana by Cocks (1978); it was replaced with Hedstroemina fragilis by Cocks (2010).
  • Hedstroemina robusta was named by Bancroft (1929).

    It was synonymized subjectively with Hedstroemina fragilis by Cocks (2010).
Synonymy list
YearName and author
1883Strophomena callawayiana Davidson p. 193 figs. pl. 16, figs 6–7
1929Hedstroemina fragilis Bancroft p. 34 figs. Pl. 2, figs. 1-3
1929Hedstroemina parva Bancroft p. 57 figs. pl. 2, figs 4–5
1929Hedstroemina fragilis Bancroft p. 58 figs. Pl. 2, figs. 1-3
1929Hedstroemina robusta Bancroft p. 59 figs. pl. 2, figs 6–7
1978Dactylogonia callawayiana Cocks p. 119
2010Hedstroemina fragilis Cocks p. 1166 figs. Plate 2, figures 9–14

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
—Lophophorata
—PanbrachiopodaCarlson and Cohen 2020
phylumBrachiopodaCuvier 1805
RankNameAuthor
subphylumRhynchonelliformeaWilliams et al. 1996
classStrophomenataWilliams et al 1996
orderStrophomenidaOpik 1934
superfamilyStrophomenoideaKing 1846
familyRafinesquinidaeSchuchert 1893
subfamilyRafinesquininaeSchuchert 1893
genusHedstroeminaBancroft 1929
speciesfragilisBancroft 1929

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.

†Hedstroemina fragilis Bancroft 1929
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Invalid names: Hedstroemina callawayiana Davidson 1883 [replaced], Hedstroemina parva Bancroft 1929 [synonym], Hedstroemina robusta Bancroft 1929 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: low Mg calcitep
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Folds: noneg
Ribbing: minorg
Spines: noneg
Internal reinforcement: noneg
Environment: marineuc
Locomotion: stationaryf
Attached: yesp
Life habit: epifaunalf
Diet: suspension feederf
Vision: blindc
Created: 2009-06-10 12:18:24
Modified: 2009-06-10 14:18:24
Source: g = genus, f = family, c = class, p = phylum, uc = unranked clade
References: Hendy 2009, Aberhan et al. 2004, Nesnidal et al. 2013, Hendy et al. 2009

Age range: base of the Caradoc to the top of the Streffordian or 458.40000 to 449.50000 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Caradoc458.4 - 449.5United Kingdom (Wales) Hedstroemina fragilis (173777 173778)
Cheneyan - Marshbrookian452.5 - 454.0United Kingdom (Wales) Hedstroemina fragilis (173793)
Cheneyan - Marshbrookian452.5 - 454.0United Kingdom (Shropshire) Hedstroemina fragilis (173796)
Streffordian451.3 - 449.5United Kingdom (Shropshire) Hedstroemina fragilis (173744)
Streffordian451.3 - 449.5United Kingdom (Wales) Hedstroemina fragilis (173799)