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[Annelida] Ancistrosyllis cingulata

Fauchald, Kristian via annelida%40net.bio.net (by FAUCHALD from si.edu)
Mon Apr 15 11:08:32 EST 2013


Just a bit of a taxonomic comment:  The fact that Harpochaeta cingulate was described based on a juvenile, does not make it an invalid species:  We would have to toss out quite a few very well known species if we would follow such a rule.  Certainly the Code does not allow us to do that .  Inconvenient perhaps, but not reason for dissing a species.  Chris suggested putting in into incertae sedis which is what I would call a temporary holding action and probably the best action since it calls attention to the problematic status of the species, and thus may make somebody in the upper end of the Adriatic do a systematic search.  If you know at what time of the year Korschelt found his material, this could give an idea of when to go fishing!

Kristian

-----Original Message-----
From: annelida-bounces from oat.bio.indiana.edu [mailto:annelida-bounces from oat.bio.indiana.edu] On Behalf Of Chris Glasby
Sent: Thursday, April 11, 2013 8:29 PM
To: 'Barbara Mikac'
Cc: Annelida mailing list
Subject: RE: [Annelida] Ancistrosyllis cingulata

Dear Barbara,

In revising the Australian pilargids we came across this overlooked species. Although it is currently included as a valid species of Ancistrosyllis in the WoRMS database, my view is that it should  regarded as Pilargidae incertae sedis, because it could equally belong to genus Cabira. Although Korschelt clearly shows a median antenna, which is suggestive of Ancistrosyllis (but not all Ancistrosyllis have a median antenna), the distinguishing features that separate Ancistrosyllis from Cabira (degree of dorso-ventral body compression; peristomium sharply divided from segment 1 in Cabira but not in Ancistrosyllis; and possibly pharynx shape - highly muscular sometimes long and looped in Ancistrosyllis), may not have developed in a juvenile. Lastly, Korschelt illustrates four lobes in the hind brain, which is also not helpful in identifying the genus as Cabira reportedly has 3 and Ancistrosyllis has 5.

Regards,
Chris 




-----Original Message-----
From: annelida-bounces from oat.bio.indiana.edu [mailto:annelida-bounces from oat.bio.indiana.edu] On Behalf Of Barbara Mikac
Sent: Friday, 12 April 2013 1:43 AM
To: Annelida mailing list
Subject: [Annelida] Ancistrosyllis cingulata

Dear colleagues,

I need help on the validity of the species Ancistrosyllis cingulata (Korschelt, 1893). The species was described from the bay of Trieste (northern Adriatic) by Korschelt (1983) but from the larval planctonic form, as Harpochaeta cingulata, and at that time taught to belong to Syllids. Ehlers (1908) thought that Harpochaeta is synonymous with Ancistrosyllis. Fauvel (1923) considered Harpochaeta as synonymous with Ancistrosyllis and gave drawings presented by Korschet (1983). In the Adriatic Sea the species was later reported only by Aleffi et al.  
(1987-1988) and Požar-Domac, 1994. Požar-Domac (1994) publication is the catalogue of the Adriatic polychaetes and obviously refers to the Korschelt (1983) finding or eventually to Aleffi et al. (1987-1988).

The species is never mentioned in the further lists of Pilargids/polychaetes of the Adriatic Sea (Castelli, 1991; Cantone, 2003; Castelli et al., 2008) nor is listed in the Mediterranean fauna (Coll et al., 2010) and I am wondering if this species is valid? Was it ever described by the adult forms after its initial description?  
Various internet links I've found always indicated that it is a valid species. But I cannot find any publication where this species is re-described or reported for the Adriatic Sea or any other area. Then I suppose that the species is not valid, and that Adriatic reports actually belong to Ancistrosyllis groenlandica (or possibly some other Ancistrosyllis species) but certainly not to A. cingulata.

What do you think?

Many thanks,
Barbara

_________

Barbara Mikac, PhD
Higher research assistant
Center for Marine Research
Ruđer Bošković Institute
Giordana Paliaga 5
52210 Rovinj
Croatia
e-mail: barbara.mikac from cim.irb.hr
http://www.irb.hr/eng/People/Barbara-Mikac

***
Consiglio Nazionale delle Ricerche
Istituto per l’Ambiente Marino Costiero
Laboratorio di Ecologia Marina
Via G. da Verrazzano 17
91014 Castellammare del Golfo (TP)
Italy

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