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Dictyobembix bella
Taxonomy
Dictyobembix bella was named by Tyler (1965). Its type specimen is USNM 144463, a shell, and it is a 3D body fossil. Its type locality is river bed immediately downstream from the Four Mile Dam on Thunder Bay River, which is in a Givetian carbonate limestone in the Four Mile Dam Formation of Michigan. It is the type species of Dictyobembix.
Synonymy list
| Year | Name and author |
|---|---|
| 1965 | Dictyobembix bella Tyler pp. 343 - 345 figs. pl. 48 f. 13-16 |
| 1971 | Dictyobembix bella Rollins et al. p. 150 |
| 1975 | Dictyobembix bella Rollins p. 22 |
| 2023 | Dictyobembix bella Wagner p. 1402 |
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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.
†Dictyobembix bella Tyler 1965
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. H. Tyler 1965 | Shell of small to moderate size, holotype 13.2 mm. high and 13.3 mm. wide, with features typical of the genus; base moderately convex; growth lines fine, moderately to strongly prosocline above selenizone, slightly opisthocline below; ornamented by spiral cords intersecting growth lines producing dictyate pattern; at junction of spiral cords and growth lines are produced nodes which are most prominent above selenizone; nodes typically strongest immediately below suture; spacing between selenizone threads and adjacent spiral cords roughly twice that between successive spiral cords on whorl below selenizone. |