Lucicutia hulsemannae, Markhaseva & Ferrari, 2005

Markhaseva, E. L. & Ferrari, Frank D., 2005, New species of Lucicutia and taxonomic status of L. grandis (Copepoda, Calanoida, Lucicutiidae), Journal of Natural History 39 (15), pp. 1077-1100 : 1094-1098

publication ID	https://doi.org/ 10.1080/00222930400005740
persistent identifier	https://treatment.plazi.org/id/DA7B8794-FF83-FFDB-FE69-FEB08CB98D42
treatment provided by	Felipe
scientific name	Lucicutia hulsemannae
status	sp. nov.

Treatment

Lucicutia hulsemannae sp. nov.

( Figures 10–12 View Figure 10 View Figure 11 View Figure 12 )

Material examined

One female, holotype (only P5 dissected), N 90741 ( ZISP). Total length 6.3 mm. Prosome urosome ratio: 1.67. Locality: eastern tropical Pacific Ocean near Volcano 7, 13 ° 22 9 N, 102 ° 07 9 W, collected 25 November 1988, depth 693– 790 m. GoogleMaps Paratypes: one female (6.30 mm, prosome/urosome ratio 1.80), N 1011361 ( NMNH), the same label data as for holotype; one female (6.25 mm, prosome/urosome ratio 1.70) GoogleMaps and one male (6.00 mm, prosome/urosome ratio: 1.5) ( ZISP N90742) , same locality data except depth, 791–985 m; three males (5.95 mm, 5.80 mm, 5.90 mm, prosome/urosome ratio: 1.4, 1.6 and 1.5, respectively) , N 1011362 ( NMNH), same locality data except depth, 791– 985 m.

Female

Total length 6.25–6.30 mm. Prosome 1.67–1.80 times longer than urosome. Cephalosome with a pair of low triangular protrusions ( Figure 10A View Figure 10 ). Rostral rami divergent from a swollen base ( Figure 10D View Figure 10 ). Genital complex symmetrical with irregular, conical plug ( Figure 10C View Figure 10 ). Second urosome somite 1.37 times wider than urosome somite 3 in dorsal view and 1.31 times wider than urosome somite 3 in lateral view. Third urosome somite longer than adjacent somites: 1.1–1.2 times longer than urosome somite 2 and 1.2–1.4 times longer than anal somite. Anal somite not swollen dorsally ( Figure 10C View Figure 10 ). Caudal rami in dorsal view nearly three times longer than anal somite and 5.5 times longer than wide ( Figure 10A View Figure 10 ). Antennule reaching the end of caudal rami. P1 with large pore on basipod; inner seta of basipod originating on the outer, posterior wall of pore ( Figure 10E View Figure 10 ); both states shared among species of the family. P5 with threesegmented rami. Medial seta on exopodal segment 2 of P5 attenuate and thin toward its tip ( Figure 10F View Figure 10 ).

Male

Total length 5.80–6.00 mm. Prosome 1.44–1.55 longer than urosome. Cephalosome laterally with pointed protrusions ( Figure 11A, B View Figure 11 ). Rostrum with rami nearly parallel ( Figure 11E View Figure 11 ). Caudal rami 5.8 times longer than wide. Antennule of 21 articulated segments, 18th the longest ( Figure 11F–H View Figure 11 ). Right P5 with exopodal segment 1 shorter than 2 and with a thin sclerotized lamella at mid-length; exopodal segment 2 with broad medial hirsute lobe. Basipod of right P5 basipod variable in shape, usually with knob along medial margin ( Figure 12A, B View Figure 12 ). Third exopodal segment of left P5 elongate, ovalrectangular; basipod with a medial projection pointed distally, with varying number of teeth at tip ( Figure 12A, C View Figure 12 ).

Remarks

The following characters distinguish females of L. hulsemannae sp. nov. from other species of Lucicutia analysed here: females with urosome somite 2 significantly wider than 3, and urosome somite 3 longer than urosome somite 2 and anal somite (females of L. grandis , L. bradyana and L. wolfendeni with urosome somite 2 not significantly wider than urosome somite 3, and urosome somite 3 not longer than 2 or the anal somite; Figures 1A, E–J View Figure 1 , 3A, B, D View Figure 3 , 4D–F View Figure 4 , 8B–F View Figure 8 ). The anal somite of L. hulsemannae is not swollen dorsally or ventrally (in L. grandis and L. bradyana , it is large and swollen dorsally or ventrally, respectively; Figures 1H–J View Figure 1 , 4D–F View Figure 4 ). The rostral rami of L. grandis do not diverge ( Figure 1D View Figure 1 ) while those of L. hulsemannae diverge from the base. The medial seta on the second exopod of P5 of L. hulsemannae is thin toward its tip while the tip of L. bradyana is robust ( Figure 4G–I View Figure 4 ). The plug of the genital double-somite of L. hulsemannae is irregularly conical, but round in L. bradyana or oval in L. wolfendeni ( Figures 4D–F View Figure 4 , 8D–F View Figure 8 ).

Males of L. hulsemannae differ from those of L. grandis , L. bradyana and L. wolfendeni in having a low chitinous lamella at about mid-length of the first exopodal segment of the right P5 (there is no lamella on the other three species); the second exopodal segment of L. hulsemannae has a hirsute medial lobe (this lobe absent in L. grandis , L. bradyana and L. wolfendeni ). The shape of P5 left basipod is similar to that of L. bradyana ; however, in other features the leg differs: exopodal segment 3 is rectangular distally, while in L. bradyana it is obtuse-triangular (Figure 7A 2, B 2, C 2).

Distribution

Lucicutia hulsemannae is known from the eastern tropical Pacific Ocean.

Etymology

The species honours Dr Kuni Hulsemann who has contributed significantly to the taxonomy of calanoid copepods, and particularly to the genus Lucicutia .