Sphaerodoridium guerritai Moreira & Parapar, 2015

Capa, Maria, Nygren, Arne, Parapar, Julio, Bakken, Torkild, Meissner, Karin & Moreira, Juan, 2019, Systematic re-structure and new species of Sphaerodoridae (Annelida) after morphological revision and molecular phylogenetic analyses of the North East Atlantic fauna, ZooKeys 845, pp. 1-97 : 75-76

Sphaerodoridium guerritai Moreira & Parapar, 2015 Figs 5X, 23K, L

Sphaerodoridium guerritai Moreira & Parapar, 2015: 93-103, figs 1-6.

Type locality.

Northern Iceland, 67°16.86'N, 16°37.77'W, 600 m.

Material examined.

(51 specs) Iceland, SMF 25299 (8 specs), North-East Iceland, Norwegian Sea, 66°32.63'N, 012°52.48'W, 317,2 m; SMF 23900 (1 spec. used for DNA sequencing SPH 058), North-East Iceland, Norwegian Sea, 66°32.63'N, 12°52.48'W, 317,2 m; SMF 24845 (1 spec. used for DNA sequencing, SPH 059), North-East Iceland, Norwegian Sea, 66°32.63'N, 12°52.48'W, 317,2 m; Svalbard, NTNU-VM 73794 (2 specs), Svalbard, Hinlopen, 79°43.1'N, 18°19.9'E, 433 m, 17 Aug 2003; NTNU-VM 73795 (1 spec.), Svalbard, Hinlopen trench, 80°23.8'N, 16°11.9'E, 420 m, 29 Aug 2003; ZMBN 127357 (3 specs), 80°9.144'N, 16°56.124'E, 340 m, 28 Aug 2009; ZMBN 127356 (1 spec. SPH278), 80°9.144'N, 16°56.124'E, 340 m, 28 Aug 2009; ZMBN 127358 (1 spec. used for DNA sequencing, SPH 327), 80°9.144'N, 16°56.124'E, 340 m, 01 Sep 2009; Norwegian Sea: ZMBN 127351 (9 specs), 62°29.5'N, 01°43.3'E, 604 m, 21 Jan 1982; ZMBN 127352 (2 specs), 62°35.1'N, 1°47.6'E, 656 m, 23 May 1984; ZMBN 127353 (9 specs), 63°02.9'N, 00°47.8'E, 1293 m, 12 Jan 1985; ZMBN 127354 (1 spec.), 62°50.6'N, 1°25.9'E, 951 m, 15 Aug 1986; ZMBN, 127355 (>10 specs), 63°2.23'N, 4°41.34'E, 760 m, 30 Sep 2013; SMF 25300 (1 spec.), East Iceland, 66°18.060'N, 012°22.380'W, 730,8 m, 22 Sep 2011.

Diagnosis.

Body ellipsoid, up to 8 mm long. Median antenna and prostomial appendages digitiform, elongated. Median antenna smooth, near half of length of lateral antennae. Lateral antennae longer than palps, with 6-10 basal papillae (spurs). Antenniform papillae absent. Tentacular cirri digitiform, with two elongated papillae on proximal third. Dorsal macrotubercles stalked, without terminal papilla, arranged in 11-12 longitudinal rows in mid-body chaetigers; stalk as long as or slightly longer than tubercle, with 1-3 small papillae along proximal half. Dorsum with additional 10-16 hemispherical spherical papillae in front of each row of macrotubercles, somewhat arranged in two irregular transverse rows following a zig-zag pattern. Ventrum with 10-18 papillae per chaetiger, arranged in three more or less defined transverse rows. Parapodia with digitiform acicular lobe from chaetiger 3; large ventral cirri, not surpassing the length of acicular lobe; midbody parapodia with 5-6 papillae. Chaetae blades showing gradation in length within and between chaetigers, slightly shorter in mid-body to posterior chaetigers; ca. six times longer than maximum width.

Remarks.

The description of this species is complete and no amendments or comments are needed.

Distribution.

First record of the species in Svalbard and Norwegian Waters. Already reported around Iceland ( Moreira and Parapar 2015).

Habitat.

Mostly in muddy sediments (sandy silt and silt), 49-1253 m depth ( Moreira and Parapar 2015, present study).