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underside
 


rhinophores
 


young, 3 mm
 

dark cerata
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Noumeaella rehderi
Marcus, 1965
 
Noumeaella rehderi
Maximum size:  11 mm (Kay, 1979).

Identification:  This species has a mottled cream to mottled brown body with slender cerata. (Note 1) The rhinophores have long, closely spaced papillae on their posterior edges.

Natural history:  Noumeaella rehderi is a common (though rarely seen) nocturnal species found in highly protected to exposed rocky habitats from the low intertidal to depths of  6 m (20 ft). However, it's most common at about 1 m (3 ft) at protected sites. It's rare in Halimeda kanaloana beds at depths up to 15 m (48 ft). It lays a white, spiral egg mass that hatches in about three days in the laboratory. (Note 2)

Distribution:  Big Island, Maui, Oahu, Kauai and Midway: widely distributed in the Indo-Pacific; also in eastern Pacific.

Taxonomic notes:  This species is listed as Noumeaella cf. rehderi in Kay, 1979 and Gosliner, 1979. It was first recorded in Hawaii from Keauhou Bay, Big Island by Terry Gosliner on Sept. 3, 1973.

Photo:  CP: 4 mm; Hekili Point, Maui; March 23, 2007.

Observations and comments:

Note 1:  We've observed light and dark animals copulating with each other in dishes.

Note 2:  Although they are probably most active at night, they frequently remain in the open during the day, particularly in shaded locations.
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