Brevicirrosyllis San Martín, López & Aguado, 2009

Rodolfo Leandro Nascimento, Marcelo Veronesi Fukuda & Paulo Cesar de Paiva, 2024, Two new incertae sedis syllids (Annelida: Syllidae) from Brazilian oceanic islands, European Journal of Taxonomy 925 (1), pp. 46-66 : 48

Genus Brevicirrosyllis San Martín, López & Aguado, 2009

Type species

Pionosyllis weismanni Langerhans, 1879 , designated by San Martín et al. (2009).

Remarks

San Martín et al. (2009) redefined the genus Pionosyllis Malmgren, 1867 and proposed several new genera, including Brevicirrosyllis , based on distinct groups previously allocated under the former genus. In the key to the identification of Brevicirrosyllis presented in that study, however, information regarding the morphology of the dorsal simple chaetae was confounded between Brevicirrosyllis mayteae ( San Martín & Hutchings, 2006) and B. ancori ( San Martín & Hutchings, 2006) : different from the key ( San Martín et al. 2009: 1469), the former was described as having pin-shaped dorsal simple chaetae, while the latter was described as having truncate ones ( Table 1 ). Here, we present an updated identification key for all Brevicirrosyllis , including the new species described in this study.

Identification key to species of Brevicirrosyllis San Martín, López & Aguado, 2009

Adapted from San Martín et al. (2009).

1. Compound chaetae heterogomph ................................ B. gorringensis ( Hartmann-Schröder, 1977) .

– Compound chaetae hemigomph ....................................................................................................... 2

2. Dorsal cirri with fibrillar inclusions .................................................................................................. 3

– Dorsal cirri without fibrillar inclusions ............................................................................................. 4

3. Dorsal cirri on chaetiger 2 present ................................................ B. weismanni ( Langerhans, 1879)

– Dorsal cirri on chaetiger 2 absent .................................. B. mariae ( San Martín & Hutchings, 2006)

4. Dorsal simple chaeta pin-shaped ................................. B. mayteae ( San Martín & Hutchings, 2006)

– Dorsal simple chaeta truncated ......................................................................................................... 5

5. Palps longer than prostomium; median antenna twice length of palps; dorsal peristomial cirri about same length of body width; parapodial glands present ....................................................................... ......................................................................................... B. ancori ( San Martín & Hutchings, 2006)

– Palps with same length of prostomium; median antenna more than four times as long as palps; dorsal peristomial cirri longer than body width; parapodial glands absent ................ B. paulolanai sp. nov.