Autolytinae from Peru: description ofMyrianida paredesisp. nov. and new records ofMyrianida pentadentata(Imajima, 1966), andProceraea micropedata(Hartmann-Schröder, 1962)

• DOI: 10.1017/s0025315415002015
• Publication Date: 2015-12-21T11:16:36Z
• Authors: Luis Aguirre; Guillermo San Martín; Patricia Álvarez-...
• Keywords: 0301 basic medicine; 0303 health sciences; 03 medical and health sciences; 14. Life underwater; 10. No inequality

A new species,Myrianida paredesi, and new records ofMyrianida pentadentata(Imajima, 1966), andProcerarea micropedata(Hartmann-Schöder, 1962), are described from the central coast of Peru.Myrianida paredesiis characterized by the presence of an additional mid-dorsal, digitiform structure, quite similar to a dorsal cirrus (unique among all syllids), a subtriangular prostomium with a posterior region extended to middle peristomium, pharynx with a single elongated sinuation and a trepan with 14–15 equal teeth in a single ring. Descriptions of male and female stolons are also provided. The phylogenetic position of the new species within Myrianida is determined using molecular data, suggesting it is closely related to the species that share the presence of one ciliary troch per segment (exceptM. pachycera; unknown inM. australiensis), moderate number of equal teeth on trepan (exceptM. pachycera), and the mode of reproduction.Descriptions of the collected specimens ofMyrianida pentadentata(Imajima, 1966), andProceraea micropedata(Hartmann-Schröder, 1962), both new reports to Peru, are also included.