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Chelidonura
(?) sp. #4
 
Chelidonura(?) sp. #4
Maximum size:  30 mm.

Identification:  This species is superficially similar to Chelidonura fulvipunctata. However, its white patches are more diffuse, it lacks any sign of longitudinal lines and it lacks a central orange spot on the front of its head. It also reaches a larger size and has a more elongate internal shell with a larger protoconch and no brown tint at the apex.

Natural history:  Chelidonura(?) sp. #4 is a rare species found in moderately exposed rocky habitats. It is known from tide pools and subtidally to 15 m (50 ft). It shows a nocturnal activity pattern when held in a dish and, unlike C. fulvipunctata, produces extensive defensive mucus when handled.

Distribution:  Oahu, Maui and Lanai.

Taxonomic notes:  This species was first recorded in Hawaii from Maliko Bay, Maui by PF on May 23, 1992. Ortea, et. all., 2014 lists it as a Chelidonura, rather than a Navanax, presumably based on shell form. However, they find multiple clades within that genus. So, we're leaving a "?" after it, pending further work.

Photo:  PF: 30 mm: Maliko Bay, Maui; May 23, 1992.

Observations and comments:

Note 1:  ( )
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