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Dactylacanthis
Taxonomy
Dactylacanthis was named by Komura (1999). It is not extant.
It was assigned to Eustephaniaceae by Komura (1999).
It was assigned to Eustephaniaceae by Komura (1999).
Synonymy list
| Year | Name and author |
|---|---|
| 1999 | Dactylacanthis Komura pp. 25, 42 |
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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. †Dactylacanthis Komura 1999
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Komura 1999 | Dactylacanthis gen. nov.
Type species :Dactylacanthis rara spec. nov. Derivation :From the Greek dactylos (=finger) and acantha (=spine), in reference to the valve having fingerlike linking spines. Diagnosis : Frustula lenticularia ad cylindrica processibus marginalibus elongatis, catenas facientia. Valvae circulares fortiter areolatae. Frons plana vel elevata, a limbo comparate nonprofundo angulis rotundis plerumque distinguenda. Areolae loculatae vel partim pseudoloculatae, intra cribris occlusae extra foraminibus rotundis apertae. Rimoportulae infra spinas et ad marginem binatim dispositae, apodae, rima una bilabiatae. Cincturae nullae. Sporae adsunt. The distinction of the genus from Eustephanias exists in the means of chain formation. Dactylacanthia entangles the processes to connect frustules, but Eustephanias produces chains by the interlocking system of the processes. |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Kiessling 2004 | |||||
Collections
No collection or age range data are available