| Triangulus | |
|---|---|
 | |
| Triangulus munidae on Munida tenuimana | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Thecostraca |
| Subclass: | Cirripedia |
| Family: | Triangulidae |
| Genus: | Triangulus Smith, 1906 |
Triangulus is a genus of parasitic barnacles in the family Triangulidae, the sole genus of the family. There are at least four described species in Triangulus. [1] [2] [3]
These species belong to the genus Triangulus:
Sacculina is a genus of barnacles that is a parasitic castrator of crabs. They belong to a group called Rhizocephala. The adults bear no resemblance to the barnacles that cover ships and piers; they are recognised as barnacles because their larval forms are like other members of the barnacle class Cirripedia. The prevalence of this crustacean parasite in its crab host can be as high as 50%.
In the past, Lernaeodiscidae has been considered a family of barnacles. Research published in 2021 by Chan et al. resulted in the genera of Lernaeodiscidae being merged with that of Peltogastridae, which now contains the members of both families. As an exception, the species Triangulus galatheae was moved to the genus Paratriangulus in the family Triangulidae.
The Sacculinidae are a family of barnacles belonging to the bizarre parasitic and highly apomorphic infraclass Rhizocephala. The Sacculinidae is one of the two larger families of Rhizocephala, containing six genera:
The Peltogastridae are a family of barnacles belonging to the bizarre parasitic and highly apomorphic infraclass Rhizocephala. The Peltogastridae are by far the largest family of Rhizocephala. They comprise 14 genera, 3 of which were moved from the family Lernaeodiscidae.
Dipterosaccus is a genus of barnacle.
There are several species names which are called "triangulus"; "triangulus" is Latin referring to triangles.
Heterosaccus is a genus of barnacles in infraclass Rhizocephala. Like other taxa in this group, they parasitize crabs. Geoffroy Smith circumscribed the genus in 1906; he initially only included H. hians. Smith circumscribed a genus distinct from Sacculina due to a difference of the mesentery; in Heterosaccus, the mesentery does not stretch down to the mantle opening but rather only is present on the ring of attachment.
Clistosaccidae is a family of parasitic barnacles belonging to the bizarre and highly apomorphic infraclass Rhizocephala, which is part of the barnacle subclass Cirripedia.
Perforatus is a genus of acorn barnacles in the family Balanidae. There is one described species in Perforatus, P. perforatus.
Notomegabalanus is a genus of acorn barnacles in the family Balanidae. There are about 12 described species in Notomegabalanus.
Notobalanus is a genus of acorn barnacles in the family Balanidae. There are at least two described species in Notobalanus.
Chirona is a genus of acorn barnacles in the family Balanidae. There are about six described species in Chirona.
Pachylasma is a genus of symmetrical sessile barnacles in the family Pachylasmatidae. There are about eight described species in Pachylasma.
Peltogasterella is a genus of parasitic barnacles in the family Peltogasterellidae. There are at least four described species in Peltogasterella.
Loxothylacus is a genus of parasitic barnacles in the family Sacculinidae. There are more than 20 described species in Loxothylacus.
Probathylepas is a genus of acorn barnacles in the family Probathylepadidae, the sole genus of the family. There is one described species in Probathylepas, P. faxian.
Parthenopea is a genus of parasitic barnacles in the family Parthenopeidae, the sole genus of the family. There are at least three described species in Parthenopea.
Pirusaccus is a genus of parasitic barnacles in the family Pirusaccidae, the sole genus of the family. There is one described species in Pirusaccus, P. socialis.
Waikalasma is a genus of symmetrical sessile barnacles in the family Waikalasmatidae, the sole genus of the family. There are at least three described species in Waikalasma.
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