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Orthotheca
Taxonomy
Orthotheca was named by Novak (1886) [Sepkoski's age data: Cm Tomm-l D Eife Sepkoski's reference number: 1,268,885]. Its type is Cryptocaris suavis.
It was reranked as Hyolithus (Orthotheca) by Holm (1893); it was reranked as Hyolithes (Orthotheca) by Reed (1909) and Resser and Endo (1937).
It was assigned to Hyolithus by Holm (1893); to Hyolithes by Reed (1909) and Resser and Endo (1937); to Hyolithidae by Henningsmoen (1952); to Orthothecida by Sepkoski (2002), Malinky (2003); and to Orthothecidae by Fisher (1962), Malinky (1990), Malinky (2009).
It was reranked as Hyolithus (Orthotheca) by Holm (1893); it was reranked as Hyolithes (Orthotheca) by Reed (1909) and Resser and Endo (1937).
It was assigned to Hyolithus by Holm (1893); to Hyolithes by Reed (1909) and Resser and Endo (1937); to Hyolithidae by Henningsmoen (1952); to Orthothecida by Sepkoski (2002), Malinky (2003); and to Orthothecidae by Fisher (1962), Malinky (1990), Malinky (2009).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1886 | Orthotheca Novak |
| 1893 | Hyolithus (Orthotheca) Holm |
| 1909 | Hyolithes (Orthotheca) Reed p. 211 |
| 1937 | Hyolithes (Orthotheca) Resser and Endo |
| 1952 | Orthotheca Henningsmoen |
| 1962 | Orthotheca Fisher p. 125 |
| 1990 | Orthotheca Malinky p. 229 |
| 2002 | Orthotheca Sepkoski |
| 2003 | Orthotheca Malinky p. 641 |
| 2009 | Orthotheca Malinky p. 591 |
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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.
G. †Orthotheca Novak 1886
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†Hyolithus (Orthotheca) holmi Cobbold 1931
†Hyolithus (Orthotheca) striata Cobbold 1931
†Orthotheca bayonet Matthew 1899
†Orthotheca buelna Lochman 1952
†Orthotheca corrugata Matthew 1899
†Orthotheca daulis Walcott 1905
†Orthotheca doris Walcott 1905
†Orthotheca interstrialis Novak 1891
†Orthotheca shriveri Malinky 2009
†Orthotheca suavis Barrande 1872
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Invalid names: Orthotheca intermedia Novak 1886 [objective synonym]
†Orthotheca subornatus Reed 1909
†Orthotheca teretiuscula Linnarsson 1877
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. M. Malinky 2009 | Hyoliths having a tightly rounded dorsal ridge, grading into tightly rounded to angular lateral edges; the venter is only slightly concave to nearly flat, and the resulting cross section has a triangular shape. Ornamentation on the shell includes longitudinal ribs or lines. |
Measurements
No measurements are available
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| Source: g = genus, p = phylum | |||||
| References: Hendy et al. 2009, d'Eichwald 1840 | |||||
Collections (40 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Placentian | Canada (Newfoundland and Labrador) | O. bayonet (240670) | |
| Tommotian | Germany (Brandenburg) | O. corneolus (8189) | |
| Atdabanian | Russian Federation (Siberia) | O. bayonett (232892) | |
| Branchian | United Kingdom (England) | Hyolithus sp., Hyolithus holmi, Hyolithus striata (79928) | |
| Dyeran | Mexico | O. buelna (10684) | |
| Delamaran | USA (Idaho) | O. sola (76096) O. sp. (207) | |
| Amgan | Norway (Rogaland) | O. teretiuscula (76545) | |
| Solvan | Sweden | O. corneolus (8150) | |
| Marjumian | USA (Vermont) | O. acicula (222) | |
| Cressagian | United Kingdom (England) | O. exilis (3711) | |
| Tremadoc | Sweden | O. sp. (3109) | |
| Tremadoc | Argentina | O. sp. (9010) | |
| Tremadoc | Spain (Zaragoza) | O. sp. (21076) | |
| Tremadoc | France (Montagne Noire) | O. sp. (20829 76571) | |
| Migneintian | United Kingdom (England) | O. lineata (3710) | |
| Arenig | Argentina | O. sp. (8869) | |
| Costonian - Harnagian | Sweden | O. sp. (2765) | |
| Pusgillian | United Kingdom (Scotland) | Hyolithes subornatus (73133) | |
| Wufeng - Hirnantian | China (JiangXi) | O. sp. (7747) | |
| Homerian | Czechia | O. pulchra (14028) | |
| Lochkovian | Czechia | O. intermedia (231818) | |
| Pragian | Morocco | O. sp. (208256 208258 208261) | |
| Early/Lower Emsian | Czechia (Prague) | O. sp. (81281) | |
| Early/Lower Emsian | Morocco | O. sp. (150334 150361 150363 150365 150580) | |
| Emsian | South Africa | O. steinmanni (35581 35582 35589 35590) O. steinmanni, O. sp. (35578) | |
| Emsian | USA (Pennsylvania) | O. shriveri (90617) | |
| Late/Upper Emsian | Morocco | O. sp. (208263) | |
| Eifelian | Germany | O. sp. (616) |