Notodasus Fauchald, 1972

Garcia-Garza, Maria E., Leon-Gonzalez, Jesus A. de & Harris, Leslie H., 2017, Relocation of Dodecaseta McCammon & Stull, 1978 (Annelida, Capitellidae) in Notodasus Fauchald, 1972, ZooKeys 715, pp. 93-101 : 94-95

Notodasus Fauchald, 1972

Notodasus Fauchald, 1972: 246-247, Pl.51 fig. a-c; García-Garza 2009: 101; García-Garza, et. al. 2009: 810; García-Garza and de León-González 2011: 35; Magalhães and Bailey-Brock 2012: 28.

Dodecaseta McCammon & Stull, 1978: 40-43, figs 1-3; Green 2002: 311.

Type species.

Notodasus magnus Fauchald, 1972

Diagnosis.

Thorax with 11 chaetigers with bilimbate capillary chaetae first chaetiger biramous. First two abdominal chaetigers with bilimbate capillaries in both rami, subsequent chaetigers with hooded hooks. Lateral organs and branchiae present.

Remarks.

The genus Dodecaseta was established by Mc Cammon and Stull ( 1978) to include Dodecaseta oraria , a species from Southern California. These authors considered that D. oraria differed from the genus Notodasus by presenting the first thoracic chaetiger biramous and capillary chaetae in the first abdominal segments. In the original description of Notodasus , Fauchald (1972) described the genus with the first chaetiger being uniramous. García-Garza et al. (2009) reviewed the Notodasus genus based on the examination of type material, and they observed that the holotype N. magnus (type species of the genus) has the first chaetiger biramous, not uniramous as originally described.

The holotype of D. oraria is a small specimen of 12 mm long and 0.8 mm wide (LACM-AHF POLY 1248). McCammon and Stull ( 1978) included 12 specimens in the original description, but they did not include variation in body size of these specimens. Based on this discrepancy in the description (and other factors) we believe that the genus Dodecaseta should be synonymized with the genus Notodasus .

Blake (2000) had previously felt that Dodecaseta should be synonymized with Notomastus since the only known species form the Southern California Bight varied from Notomastus only in that it has notochaetae in the first abdominal chaetiger, and the presence of abdominal capillaries is not a considered generic character of capitellids.

Green (2002) expands the genus Dodecaseta , in order to describe two new species from the Andaman Sea ( D. fauchaldi and D. eibyejacobseni ) including the following characters, 12 and 13 chaetigers with capillary chaetae, with the last one or two transitional in appearance with expanded neuropodial lobes, and protruded lateral organs. However, the ammended diagnosis proposed by Green for Dodecaseta agrees with the diagnosis of the genus Notodasus Fauchald, 1972. Consequently, we believe that D. fauchaldi and D. eibyejacobseni should also be reassigned to the genus Notodasus .