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Loganellus
Taxonomy
Loganellus was named by Devine (1863) [Sepkoski's age data: Cm Trep]. It is not extant. It is the type genus of Loganellidae.
It was reranked as Crepicephalus (Loganellus) by Hall and Whitfield (1877).
It was assigned to Crepicephalus by Hall and Whitfield (1877); to Idahoiidae by Jell and Adrain (2002); to Asaphida by Sepkoski (2002); and to Loganellidae by Ludvigsen et al. (1989) and Adrain (2011).
It was reranked as Crepicephalus (Loganellus) by Hall and Whitfield (1877).
It was assigned to Crepicephalus by Hall and Whitfield (1877); to Idahoiidae by Jell and Adrain (2002); to Asaphida by Sepkoski (2002); and to Loganellidae by Ludvigsen et al. (1989) and Adrain (2011).
Synonymy list
| Year | Name and author |
|---|---|
| 1863 | Loganellus Devine |
| 1877 | Crepicephalus (Loganellus) Hall and Whitfield |
| 1989 | Loganellus Ludvigsen et al. p. 16 |
| 2002 | Loganellus Jell and Adrain p. 399 |
| 2002 | Loganellus Sepkoski |
| 2011 | Loganellus Adrain p. 107 |
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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. †Loganellus Devine 1863
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†Crepicephalus (Loganellus) maculosus Hall and Whitfield 1877
†Crepicephalus (Loganellus) montanensis Whitfield 1876
†Loganellus duplicata Raymond 1937
†Loganellus macropleurus Rasetti 1944
†Loganellus similis Rasetti 1944
†Loganellus unisulcata Raymond 1937
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Ludvigsen et al. 1989 | A genus of Loganellidae with palpebral lobes located opposite Is furrow and some distance from glabella. Anteriorly-rounded glabella is parallel-sided or gently tapered and has firmly
impressed lateral glabellar furrows on testate surfaces. Anterior border is short band. Pygidium is broad and semielliptical in outline with length less than half of width. |