Acantorna Lehnert & Stone 2020
- Dataset
- Acantorna-a new genus of Hymedesmiidae (Porifera, Demospongiae Poecilosclerida) from the western Aleutian Islands of Alaska with description of Acantorna tahoma n. sp.
- Rank
- GENUS
- Published in
- Lehnert, Helmut, Stone, Robert P. (2020): Acantorna-a new genus of Hymedesmiidae (Porifera, Demospongiae Poecilosclerida) from the western Aleutian Islands of Alaska with description of Acantorna tahoma n. sp. Zootaxa 4755 (1): 155-162, DOI: 10.11646/zootaxa.4755.1.7
Classification
- kingdom
- Animalia
- phylum
- Porifera
- class
- Demospongiae
- order
- Poecilosclerida
- family
- Hymedesmiidae
- genus
- Acantorna
diagnosis
Diagnosis: Stalked, flabellate Hymedesmiidae with subectosomal spicule tracts fanning out at the surface forming an ectosomal palisade. Subectosomal tracts and ectosomal palisade consist of acantho-tornotes. The choanosome is a confusedly plumose arrangement of all spicule types: acanthostyles, acantho-tornotes and microscleres, sometimes vague plumose tracts of acanthostyles are recognizable near the ectosome. Microscleres are arcuate isochelae and thin sigmas.
discussion
Remarks: The ectosomal spicules are straight diactines, isodiametric, acanthose, with mucronate, sometimes unequal ends and thus conform to the definition of tornotes except for the fact that the tornotes of Acantorna are completely acanthose. Previously known tornotes are smooth or might have micro-spined ends. We suggest to name these acantho-tornotes acantornotes.
etymology
Etymology. The genus Acantorna is named after the unique acantornotes not known from other taxa of Poecilosclerida.
type_taxon
Type species: Acantorna tahoma n. sp.
Name
- Homonyms
- Acantorna Lehnert & Stone 2020