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Leptomitus

Demospongea - Protomonaxonida - Leptomitidae

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. Its type is Leptomitus zitteli.

It was assigned to Poecilosclerida by Sepkoski (2002); to Demospongia by Bambach et al. (2007); and to Leptomitidae by García-Bellido et al. (2007).

Synonyms
Synonymy list
YearName and author
1886Leptomitus Walcott
1920Tuponia Walcott
2002Leptomitus Sepkoski, Jr.
2007Leptomitus Bambach et al. p. S80
2007Leptomitus García-Bellido et al. pp. 469-472

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RankNameAuthor
kingdomAnimalia()
phylumPoriferaGrant 1836
classDemospongea(Sollas 1875)
RankNameAuthor
orderProtomonaxonida
familyLeptomitidaeDe Laubenfels 1955
genusLeptomitusWalcott 1886

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.

Diagnosis
ReferenceDiagnosis
D. C. García-Bellido et al. 2007Elongate 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.