27 m. [details]

15-30 m. [details]

5-15 m. [details]

Procerini with only 1-2 unidentate simple chaetae in all chaetigers, and a trepan with single large, and 25-28 ... [details]

Procerini with only 1-2 unidentate simple chaetae in all chaetigers, and a trepan with single large, and 25-28 ... [details]

Myrianida with long cirrophores on the long cirri from anterior chaetigers, and a trepan with 33-45 equal, or ... [details]

Proceraea with a prostomial white spot and with two distinct and two faint longitudinal brown lines.  [details]

Proceraea with brown segmental bands, and antennae, dorsal tentacular cirri, and dorsal cirri brown. [details]

Mediterranean, Adriatic Sea, only known from type locality.  [details]

Mediterranean Sea, from Chafarinas Islands in Morocco, Istria in Croatia, and Banyuls-sur-Mer in France.  [details]

Madeira Island, Atlantic Ocean. Only known from the type locality.  [details]

Only known from Madeira Island, Atlantic Ocean.  [details]

Erseia is named in honour of Christer Erséus for his contributions to annelid phylogeny and taxonomy. The name is ... [details]

The species epithet oligochaeta is derived from the Greek oligos, meaning few, and the Greek khaite meaning 'hair' ... [details]

The species epithet albocephala is derived from the Greek albus meaning white, and the Greek kephale meaning head, ... [details]

On sponges and hydroids.  [details]

Among Cladocera caespitosa blocks, Padina and other algae, and in coralligène.  [details]

Among hydroids on balanids.  [details]

Among hydroids on balanids, rocks with Lithothamnion and epifauna. [details]

Probably with schizogamy. Three specimens with pink eggs from about chaetiger 40, one of them with a newly ... [details]

Unknown. [details]

Croatia, Istria, 2 km west of Rovinj (45º05.220'N, 13º36.517'E). [details]

Chafarinas Islands, Western Mediterranean Sea. [details]

NW Madeira Island, East of Porto Moniz (32º51.664'N, 17º09.105'W). [details]