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Protohertzina
Taxonomy
Protohertzina was named by Missarzhevsky (1973) [Sepkoski's age data: V (N-Da-l)-Cm(Boto-l)]. It is considered to be a form taxon. Its type is Protohertzina anabarica.
It was assigned to Furnishinidae by Clark et al. (1981) and Azmi and Pancholi (1983); to Protoconodontida by Sepkoski (2002); to Protoconodonta by Parkhaev and Demidenko (2010); and to Chaetognatha by Kouchinsky et al. (2017).
It was assigned to Furnishinidae by Clark et al. (1981) and Azmi and Pancholi (1983); to Protoconodontida by Sepkoski (2002); to Protoconodonta by Parkhaev and Demidenko (2010); and to Chaetognatha by Kouchinsky et al. (2017).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1973 | Protohertzina Missarzhevsky p. 54 |
| 1981 | Protohertzina Clark et al. p. W114 |
| 1982 | Emeidus Chen p. 258 |
| 1983 | Protohertzina Azmi and Pancholi p. 366 |
| 1984 | Hastina Yang and He p. 38 |
| 2002 | Protohertzina Sepkoski |
| 2010 | Protohertzina Parkhaev and Demidenko p. 925 |
| 2017 | Protohertzina Kouchinsky et al. p. 396 |
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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. †Protohertzina Missarzhevsky 1973
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†Protohertzina anabarica Missarzhevsky 1973
†Protohertzina cultrata Missarzhevsky 1977
†Protohertzina dabashanensis Yang and He 1984
†Protohertzina robusta Qian 1977
†Protohertzina siciformis Missarzhevsky 1973
†Protohertzina unguliformis Missarzhevsky 1973
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Invalid names: Emeidus primitivus Chen 1982 [synonym], Hastina bialata Yang and He 1984 [synonym]
Invalid names: Emeidus Chen 1982 [synonym], Hastina Yang and He 1984 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Y. Parkhaev and Y. Demidenko 2010 | "Bilaterally symmetrical, conical strongly elongated claw-like elements, straight or gradually bent, with expanded basal part. Basal cavity deep, reaching apical part of element. Anterior side convex, rarely straight, circular in cross-section, with small depression (furrow) in basal part of element. Posterior side concave, rarely straight, with median carina. Median carina rarely present on anterior side. Anterior and posterior sides separated from each other by lateral ribs. Chemical composition of elements calcium phosphate." |