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central cerata
 

lateral cerata





 
Mourgona
(?) sp. #5
 
Mourgona(?) sp. #5
Maximum size:  about 5-8 mm.

Identification:  This is a translucent-cream species. The large central cerata are moderately inflated with small, marginal teeth and no visible branches of the digestive gland. They are frosted with minute olive-green flecks and decorated with a few opaque white blotches. The smaller lateral cerata are more flattened with prominent "palm-like" branches of the digestive gland. They have fewer olive-green flecks but more opaque-white blotches. The head and rhinophores are frosted with minute olive-green flecks that become denser on the distal portions of the rhinophores. The rhinophores are tipped with white and the notum is flecked with green. The cardiac sack has a comet-shaped white patch. The pattern of pigmentation distinguishes it from Mourgona(?) sp. #3.

Natural history:  Mourgona(?) sp. #5 is known from one animal found on algae (Cladophora catenata?) in a shallow, rocky habitat. The central cerata were readily autotomized when it was handled.

Distribution:  Maui.

Taxonomic notes:  It was first recorded in Hawaii from La Perouse Bay, Maui by Karolle Wall on Nov. 28, 2019. The genus is uncertain pending further work.

Photo:  Karolle Wall: about 5-8 mm; some central cerata autotomized: La Perouse Bay, Maui: Nov. 28, 2019.

Observations and comments:

Note 1:  ( )
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