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Pherusa parmata Flabelligeridae (flabelligerid)
Terebellida (Annelida: Polychaeta)
 
Pherusa  parmata  (Grube, 1878).   Family Flabelligeridae  
     Pherusa parmata
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 Habitat: Intertidal. Rocky shore. Bays and sheltered beaches. Burrow contains little or no sediment. Depth range: 0-65 (m). Salinity regime: Harbour-like variation. Microhabitat:  Secondary inhabitant of any suitably-sized boring in sandstone, and in crevices Tube: No tube. Occupies borings
Occurrence:  Consistently occurring, sometimes common. Density: 100 (m2).
Distribution in NZ: Appears to be more common in the northern North Island.
 Feeding guild: Surface deposit/filter-feeding.
 Diagnosis:  Genus Pherusa in Family Flabelligeridae.
Pherusa with a tough grey-brown outer surface (not obviously papillated), oblique hard cephalic plate encrusted with debris, and anterior cage of long anterior chaetae. Notochaetae crossbarred capillaries. Body neurochaetae 2-3 thick, dark, simple hooks. Colour:  Maximum size: 40 mm total length, 5 mm body width.
 Notable aspect: Cephalic plate, anterior cage of chaetae, neurochaetal hooks.
 Comparisons:  Flabelligera affinis is the other intertidal flabelligerid. It is encased in mucus and lacks a shield-like head structure.
 Taxonomy:  Pherusa parmata was first described from the Phillipines. It is possible the New Zealand species is a similar but distinct species, such as the Australian Pherusa horsti which Augener (1926) recorded as a subspecies for Stewart Island worms.
 Distribution: Phillipines, New Zealand
 Biology: Cryptic in crevices and borings in mudstone, etc. Morton and Miller report the species has luminescent patches.
 Best References:   Biology: No recommendation. Taxonomy: Augener (1926) Papers from Dr. Th. Mortensen's Pacific Expedition 1914-16. 34. Polychaeta III. Polychaeten von Neuseeland. II. Sedentaria. Videnskabelige Meddelelser fra Dansk naturhistorisk Forening, KĂžbenhavn 81:157-294.

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 information: 
 Synonyms,  NZ records Original figures Original description details
 Genus diagnosis More pictures Further references (biology, etc) Family Flabelligeridae

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Data last edited 4/07/2004, and page last generated by G. Read, 27/07/2004    (dd/mm/yy)