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Isograptus
Taxonomy
Isograptus was named by Moberg (1892) [Sepkoski's age data: O Aren-u O Llvi-u]. It is not extant. Its type is Didymograptus gibberulus.
It was assigned to Graptoloidea by Sepkoski (2002); and to Isograptidae by Toro et al. (2020).
It was assigned to Graptoloidea by Sepkoski (2002); and to Isograptidae by Toro et al. (2020).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1892 | Isograptus Moberg |
| 2002 | Isograptus Sepkoski |
| 2020 | Isograptus Toro et al. p. 155 |
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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. †Isograptus Moberg 1892
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†Isograptus gibberulus Nicholson 1875
†Isograptus victoriae Harris 1933
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†Isograptus victoriae lunatus Harris 1933
†Isograptus victoriae maximodivergens Harris 1933
†Isograptus victoriae victoriae Harris 1933
†Isograptus victoriae maximus Harris 1933
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. A. Toro et al. 2020 | Reclined two-stiped isograptids; dextral, thecae simple with rutellate apertures, shorter and wider in earlier species, with thecal length increasing in later species; proximal development type isograptid, dextral, with low prosicular origin of th1(1), rarely sinistral. |