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Leptodesma (Leptodesma) matheri
Taxonomy
Leptodesma (Springeria) matheri was named by Elias (1957). It is a 3D body fossil. Its type locality is Village of Milo, which is in a Serpukhovian offshore sandstone in the Redoak Hollow Formation of Oklahoma.
It was recombined as Leptodesma (Leptodesma) matheri by Busanus and Hoare (1991), Hoare (1993), Anelli et al. (2006) and Hoare (2007).
It was recombined as Leptodesma (Leptodesma) matheri by Busanus and Hoare (1991), Hoare (1993), Anelli et al. (2006) and Hoare (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Leptodesma (Springeria) matheri Elias p. 761 figs. pl. 92, figs. 1-8 |
| 1991 | Leptodesma (Leptodesma) matheri Busanus and Hoare pp. 468 – 471 figs. 4.1 – 4.2 |
| 1993 | Leptodesma (Leptodesma) matheri Hoare p. 380 fig. 3.16 |
| 2006 | Leptodesma (Leptodesma) matheri Anelli et al. p. 1131 |
| 2007 | Leptodesma (Leptodesma) matheri Hoare p. 69 figs. 4.13 – 4.15 |
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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.
†Leptodesma (Leptodesma) matheri Elias 1957
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. W. Busanus and R. D. Hoare 1991 | Leptodesma (Leptodesma) with straight hinge- line longer than general length of shell body, bordered by pro- nounced ridge posteriorly; posterior margin with deep concavity ventral to hingeline; ventral margin with a slight concavity, formed by a shallow sulcus radiating from umbonal area, near anterior margin; anterior lobe compressed; umbonal shoulder extends posteriorly intersecting posterior margin below concave area; surface ornamented with distinct, widely spaced, growth lamellae. | |
| R. D. Hoare 1993 | Leptodesma (Leptodesma) with a relatively coarse, comarginally wrinkled, valve surface with closely spaced, fine lirae; posterior wing incomplete; beak rises well above hingeline, located about one-fourth length posterior to anterior margin; broad, distinct sulcus separates anterior auricle from body forming a concave emargination in ventral margin; posterior wing sulcate; umbonal slope diverges from hingeline at angle of 32˚. |
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| height | 1 | 18.2 |
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Kiessling 2004, Hendy 2009, Aberhan et al. 2004 | |||||
Age range: base of the Chesterian to the top of the Desmoinesian or 335.50000 to 306.00000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chesterian - Brigantian | USA (Ohio) | Leptodesma matheri (85363) | |
| Chesterian | USA (West Virginia) | Leptodesma matheri (92956 92965 92967 92974) | |
| Serpukhovian | USA (Oklahoma) | Leptodesma matheri (type locality: 5611) | |
| Serpukhovian | USA (West Virginia) | Leptodesma matheri (56142 65682) | |
| Morrowan - Desmoinesian | Brazil | Leptodesma matheri (67801 211609 211611) |