Anobothrus cf. glandularis Hartmann-Schröder, 1965  

Ampharetinae Malmgren, 1866

Anobothrus Levinsen, 1884

Anobothrus cf. glandularis Hartmann-Schröder, 1965

Voucher. Sea Lion: station 8 MFB

Diagnosis. Voucher is a complete specimen, 10mm long and 1mm wide. Thorax consists of paleae bearing segment and 14 chaetigers, 12 of these uncinigers; abdomen with 13 uncinigers.  Prostomium  Ampharete-type, trilobed, without glandular ridges.  Paleae present, about 15 per fascicle, longer than most developed notochaetae, slender, gradually tapering into long, thin tip. Four pairs of branchiae in 3 + 1 arrangement; three anterior pairs are arranged in a row on a raised ridge, the 4th pair is stand alone, located posterior at the level of notopodia of thoracic chaetiger 2 (the chaetiger following paleae bearing segment); styles of branchiae mostly missing, where present these are long and smooth, cylindrical; branchiophores of  3 anterior pairs of equal size, branchiophore of posterior pairs, smaller, low (can be overlooked). Whitish, circular band  anterior to notopodia of TU-3 (stains strongly red using Shirla stain), additionally stain shows ventral only bands on TU-1 and TU-2. First and second notopodia smaller than in subsequent chaetigers, but not reduced. The modified notopodia on TU-8 slightly shifted dorsally and  connected with low glandular ridge. Notochaetae in two rows throughout the thorax, one row consist of 6-7 long, smooth, narrowly limbate capillaries and second row consists of similar, but shorted chaetae; in modified notopodia of TU-8 limbate notochaetae wider, abruptly tapering into slender tip distally (their surface may appear hirsute under high magnification). Abdominal segments without rudimental notopodia or neuropodial cirri. Pygidium a short, wide cone, dorsally slightly enlarged, no cirri observed.

Remarks. Genus Anobothrus has been a subject of recent reviews worldwide (Jirkov, 2008) and regionally concentrating on Southern Ocean and South American waters (Schüller and Jirkov, 2013), with some new species discovered in the process, many of those from deep waters. Characters of those species are summarized in Table accompanying this description. Of the 4 known species of Anobothrus known from the region, which have circular band anterior to TU-3, Falkland specimens agree with A. glandularis, although they differ in number of abdominal segments (12 in A. glandularis, 13 in Falkland specimens), but this character can show variation in other Anobothrus species (see Jirkov, 2011) and position of the posterior 4^th branchiophore. Until the examination of type specimens of A. glandularis is possible to confirm the identity of Falkland specimens, we prefer to assign the name Anobothrus cf. glandularis at this stage.

Comparisons of Southern Ocean/South American species of Anobothrus