Vivgottoia garwoodi Kim & Sikorski & O'Reilly & Boxshall 2013, n. gen. et n. sp.
Creators: name: Kim, Il-Hoi
name: Sikorski, Andrey
name: O'Reilly, Myles
name: Boxshall, Geoff A.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Hexanauplia
Cyclopoida
Clausiidae
Vivgottoia
Vivgottoia garwoodi

description: Vivgottoia garwoodi n. gen. et n. sp.   
 Type material: Holotype ♀ ovigerous (dissected and mounted on a glass slide) from inside tail fragment of terebellid polychaete (probably Phisidia aurea); Glen Arm, Antrim, Northern Ireland, Stn GL 5C (54 o 58.20’N, 05 o 55.32’W), depth 32 m, collected by P. Garwood; BMNH Reg. No. 2012.1394.   
 Female. Body (Fig. 23A) vermiform, elongate, cylindrical, and composed of well-marked cephalosome, first to fifth pedigerous somites, genital complex and 1-segmented abdomen. Body length 2.04 mm. Cephalosome smaller than pedigerous somites, 141×166 µm, nearly circular, with slightly produced but truncate frontal margin. First to fifth pedigerous somites distinctly defined from one another by lateral constrictions, 166×178, 295×233, 350×233, 430×255, and 313×231 µm, respectively. Genital complex 81×179 µm; paired genital apertures large and each positioned dorsolaterally on enlarged genital prominence (Fig. 23B). Abdomen 1-segmented, dorsally confluent with but ventrally well defined from genital complex, about 246×91 µm. Caudal ramus tapering, fused to abdomen at base, about 144×44 µm, with 2 lateral and 2 small distal setae.   
Rostrum (Fig. 23C) shield-like, directed posteroventrally, longer than wide and truncate at apex, ornamented with 2 pairs of setules on anterior surface. Antennule (Fig. 23D) stout and 5-segmented; first segment longest; armature formula 1, 2, 1, 1, and 1; distal 2 segments with minute spinules along anterior margin. Antenna (Fig. 23E) 2-segmented; proximal segment 2.5 times as long as wide, unarmed but with patch of spinules distally; distal segment twice as long as wide, inserted on outer margin of proximal segment, armed with 3 apical setae, one distinctly larger than other 2.  
Labrum (Fig. 23G) unornamented, with strongly tapering posterior margin. Mandible (Fig. 23H) terminating in single blade, articulated at base. Maxillule (Fig. 23I) lobate, armed with 2 outer and 2 medial setae. Maxilla (Fig. 23J) 2-segmented; proximal segment unarmed; distal segment forming strong claw bearing subdistal patch of spinules on convex margin. Maxilliped (Fig. 23K) 3-segmented; first segment expanded but unarmed; second segment small and unarmed; terminal segment forming strong, smooth claw.  
Legs 1–4 (Fig. 24A–D) positioned ventrolaterally, all identical in form, biramous, composed of undivided protopod and single-segmented rami; intercoxal sclerites lacking; each protopod with 1 outer seta but lacking inner seta; both rami of legs indistinctly defined from protopod. Exopod of all legs with longitudinal sclerotization along outer margin and bearing either 1 (in legs 1, 3 and 4) or 2 (in leg 2) simple setae. Endopod of all legs expanded, foliaceous and unarmed, with constriction on outer margin and sclerotization along outer margin of distal part.  
Leg 5 (Fig. 24E) rudimentary, represented by 2 simple setae. Leg 6 absent.  
 Male. Unknown.   
 Etymology. The specific name honours Dr Peter R. Garwood (Identichaet, Newcastle-upon-Tyne) in recognition of his contributions over many years collecting copepods associated with invertebrates.   
 Remarks. This is the first clausiid to be reported from a terebellid host, although terebellids are common hosts of symbiotic copepods from other families such as the Saccopsidae and Xenocoelomatidae.
description: Published as part of Kim, Il-Hoi, Sikorski, Andrey, O'Reilly, Myles & Boxshall, Geoff A., 2013, Copepods associated with polychaete worms in European seas, pp. 1-62 in Zootaxa 3651 (1) on pages 43-44, DOI: 10.11646/zootaxa.3651.1.1, http://zenodo.org/record/5264661