Raricirrus, Hartman, 1961

Magalhães, Wagner F., Linse, Katrin & Wiklund, Helena, 2017, A new species of Raricirrus (Annelida: Cirratuliformia) from deep-water sunken wood off California, Zootaxa 4353 (1), pp. 51-68 : 54-55

Key to species of Raricirrus

1. Chaetae including normal and natatorial capillaries and smooth acicular spines; capillaries present on neuropodia.......................................................................................... Raricirrus jennae sp. nov.

- Chaetae including normal and natatorial capillaries, simple curved spines and serrate forms (pectinate to coarsely serrate falcigers); capillaries absent on neuropodia................................................................... 2

2 (1). Simple curved spines absent.................................................. R. beryli Petersen & George, 1991

- A pair of simple curved spines (reproductive stylet) present on one posterior end neuropodium........................ 3

3 (2). Heart body from segments 4–11, two fused posterior segments bearing enlarged spines........... R. variabilis Dean, 1995

- Heart body from segments 9–12, single or two posterior modified segments bearing enlarged spines................................................................................................... R. maculatus Hartman, 1961