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Leptomitus
Taxonomy
Leptomitus was named by Walcott (1886) [Sepkoski's age data: Cm Atda-u Cm uMid-m Sepkoski's reference number: 766,858,883]. It is not extant. It is the type genus of Leptomitidae.
It was assigned to Poecilosclerida by Sepkoski (2002); to Leptomitidae by Finks et al. (2004) and García-Bellido et al. (2007); and to Demospongia by Bambach et al. (2007).
It was assigned to Poecilosclerida by Sepkoski (2002); to Leptomitidae by Finks et al. (2004) and García-Bellido et al. (2007); and to Demospongia by Bambach et al. (2007).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1886 | Leptomitus Walcott |
| 1920 | Tuponia Walcott |
| 2002 | Leptomitus Sepkoski |
| 2004 | Leptomitus Finks et al. p. 9 |
| 2007 | Leptomitus Bambach et al. p. S80 |
| 2007 | Leptomitus García-Bellido et al. pp. 469-472 |
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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. †Leptomitus Walcott 1886
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†Leptomitus conicus García-Bellido et al. 2007
†Leptomitus lineatus Walcott 1920
†Leptomitus minor Resser and Howell 1938
†Leptomitus teretiusculus Chen et al. 1989
†Leptomitus undulatus Rigby and Collins 2004
†Leptomitus zitteli Walcott 1886
Invalid names: Tuponia Walcott 1920 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. C. García-Bellido et al. 2007 | Elongate or goblet-shaped, tubular to obconical, very thin-walled sponges with double-layered skeleton. Coarse, moderately widely spaced, en echelon oxeas are dominant elements that extend as parallel rods virtually the entire length of the sponge in the outer skeletal layer. Spaces between rods filled with thatch of smaller
vertical oxeas that combine with coarse rods to produce the outer skeletal layer. Inner layer a thatch of tiny horizontal, monaxial spicules. Vertical small spicules do not occur in bundles, while horizontal spicules are not clustered or cluster into ill-defined bundles. Walls lack parietal gaps and major canals. |