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Biuve
sp. #4
 
Biuve sp. #4
Maximum size:  30 mm.

Identification:  This species is superficially similar to Biuve cf. 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:  Biuve 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 B. cf. 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. Manuel Malaquias suggested that it's a Biuve and stated that its inclusion as a Mannesia in Table 1 of Zamora-Silva & Malaquias (2017) was erroneous. (pers. com.) It's also been listed in some sources as a Chelidonura and Navanax.

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

Observations and comments:

Note 1:  ( )
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