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Nygren, Arne; Sundkvist, Tobias; Mikac, Barbara; Pleijel, Fredrik. 2010. Two new and two poorly known autolytines (Polychaeta: Syllidae) from Madeira and the Mediterranean Sea. Zootaxa 2640: 35–52.
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We describe Proceraea albocephala, new species, from Madeira, and Erseia oligochaeta, new genus and new species, from Istria, Croatia, and we provide redescriptions of Proceraea madeirensis (Nygren, 2004) from topotype material, and Myrianida longoprimicirrata (López, San Martín & Jimenéz, 1997) from material collected at Istria, Croatia, and Banyuls-sur-Mer, France. Proceraea albocephala, new species is morphologically separated from similar species by a prostomial white spot, and E. oligochaeta, new genus, new species is unique in having only a few (1–2) simple unidentate chaetae in all chaetigers, and a trepan with a single large and 25–28 smaller teeth. We assess the phylogenetic positions of the four species using nuclear 18SrDNA, together with mitochondrial COI and 16SrDNA. Our molecular data show that among the sequenced autolytines 1) P. albocephala, new species is most closely related to P. nigropunctata Nygren & Gidholm, 2001, P. okadai (Imajima, 1966), and P. cornuta (Agassiz, 1862), 2) E. oligochaeta, new genus, new species belongs within a clade together with Procerastea nematodes Langerhans, 1884, Virchowia clavata Langerhans, 1879, and Imajimaea draculai (San Martín & López, 2002), 3) M. longoprimicirrata is sister species to M. pentadentata (Imajima, 1966), and 4) P. madeirensis has a basal position within Procerini. The molecular data suggests that Proceraea Ehlers, 1864 as currently delineated is paraphyletic.
Eastern Atlantic
Mediterranean Sea in general
Systematics, Taxonomy
Date
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2013-01-12 18:30:12Z
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2014-04-07 10:59:13Z
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 Diagnosis

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

 Diagnosis

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

 Diagnosis

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

 Diagnosis

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

 Diagnosis

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

 Distribution

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

 Distribution

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

 Distribution

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

 Distribution

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

 Etymology

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

 Etymology

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

 Etymology

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

 Habitat

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

 Habitat

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

 Reproduction

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

 Reproduction

Unknown. [details]

 Type locality

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

 Type locality

Chafarinas Islands, Western Mediterranean Sea. [details]

 Type locality

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