NewFabriciolaandManayunkiaspecies (Fabriciinae: Sabellidae: Polychaeta) from Papua New Guinea

Publisher Website
Google Scholar
Abstract
Relationships amongst the various clades of fabriciin sabellids are largely unresolved. One potential solution is to introduce further characters, as well as to describe new species. In this paper characters based on reproductive system are used in descriptions of two new species of Fabriciola Friedrich and a new species of Manayunkia Leidy from Papua New Guinea. Fabriciola is identified by the presence of non-vascularized, ventral filamentous appendages, but there are two distinct groups of species within the genus. The new species Fabriciola cri n. sp., and F. minuta n. sp., reflect this heterogeneity, Fabriciola cri, having red peristomial and pygidial eyes, and pin-head chaetae, is unusual in having spermathecae in the radiolar crown of females. Fabriciola minuta has black peristomial and pygidial eyes and a distinctive peristomial collar also seen in F. baltica Friedrich, F. liguronis Rouse and F. parvus Rouse. Fabriciola minuta is the first fabriciin described, apart from species in Brandtika Jones and Monroika Hartman, to have only two abdominal chaetigers as an adult. It has spermathecae in the radiolar crown of females that resemble those found in Manayunkia species. A new species of Manayunkia, M. mizu, resembles other species in this genus in having pseudospatulate inferior notochaetae in thoracic chaetigers 2–5. It also has spermathecae in the radiolar crown (in females), a total of 14 pinnules and a small number of thoracic uncini per fascicle.