| Alloceramaster irritatus | |
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Order: | Valvatida |
| Family: | Goniasteridae |
| Genus: | Alloceramaster |
| Species: | A. irritatus |
| Binomial name | |
| Alloceramaster irritatus (Clark & McKnight, 2001) | |
| Synonyms | |
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Alloceramaster irritatus is a species of sea star in the family Goniasteridae found southeast of Norfolk Island and off New Caledonia. [1]
The species has a pentagonal body. Abactinal plates are covered by a granular layer that forms a discrete cover over individual plates. Radial plates are wide, round to polygonal, and display peripheral rectangular granules. There are 6 superomarginal plates and 8 to 9 inferomarginal plates (with the distalmost small, upturned, and adjacent to the terminal plate). Superomarginals are covered by widely spaced granules (20–40) on a raised surface, otherwise covered by closely spaced round granules. Inferomarginal plates are numerous and dense, covered by polygonal to round granules. Furrow spines number 7 to 9 (distally 5 or 6). Subambulacral spines are arranged in 3 to 4 irregular series, decreasing in size from those adjacent to the furrow to those adjacent to the actinal plates. [1]
This species is known from southeast of Norfolk Island (Norfolk Basin) at 530 meters and from off New Caledonia at depths of 428 to 470 meters. [1]