Diplocirrus Haase, 1915

Teixeira, Juliana Henrique, Rizzo, Alexandra Elaine & Santos, Cinthya Simone Gomes, 2015, Three new species of Diplocirrus Haase, 1915 (Polychaeta: Flabelligeridae) from Campos Basin in SE Brazil, Zootaxa 4027 (2), pp. 287-295 : 288

Key to the species Diplocirrus Haase, 1915 (modified from Salazar-Vallejo & Buzhinskaja, 2011)

1. Body papillae abundant............................................................................................................................................. 2

- Body papillae scarce, long, tunic looks bare .......................................................... Diplocirrus sp. from Sri Lanka (*)

2(1). Body papillae short, giving a velvety appearance..................................................................................................... 3

- Body papillae long, giving a hirsute appearance. ................................................................................................... 13

3(2). Body without sand particles ......................................................................................................................................4

- Body with sand particles ........................................................................................................................................... 9

4(3). Ventrolateral gonopores present in some anterior chaetigers.................................................................................... 5

- Ventrolateral gonopores absent ................................................................................................................................. 7

5(4). First chaetiger with long chaetae, about half as long as body width; caruncle posteriorly expanded ........................ ................................................................................................................. D. erythroporus Gallardo, 1968 ( Vietnam)

- Anterior end with short chaetae, 1/3–1/5 as long as body width; caruncle posteriorly tapering .............................. 6

6(5). Median chaetigers with neurochaetae tapering, 22–25 articles, and tip delicately falcate; cirriform branchiae with lamellae along basal ¼–1/5 of each filament ........................................... D. branchiatus ( Rullier, 1965) ( Australia)

- Median chaetigers with neurochaetae barely tapering, 8–11 articles, and tip markedly falcate; cirriform branchiae with lamellae along basal 1/3–1/2 of each filament ................................................................................................... .................................................................................... D. nicolaji ( Buzhinskaja, 1994) (Northwestern Sea of Japan)