Lucicutia wolfendeni Sewell, 1932

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 : 1091-1094

Lucicutia wolfendeni Sewell, 1932

( Figures 8 , 9 )

Lucicutia wolfendeni Sewell 1932, p 289 ; Tanaka 1963, p 46 –49, Figure 171; Vervoort 1957, p 130 –131, Figure 120, 121; Hulsemann 1966, p 738, Figures 50, 51, 73, 78, 102; Heptner 1971, p 146, Figure 30; 1986, p 53–54.

Lucicutia grandis ( Giesbrecht, 1895) : Wolfenden 1911, p 315 –316, Figure 58; Sars 1924 – 25, p 208, Plate 56; Brodsky 1950, p 328 –329, Figure 227; Vervoort 1957, p 131; Hernández and Suárez-Moralez 1994, p 169, Figure 89.

Female

Total length 6.5–7.7 mm. Cephalosome with small triangular or rounded lateral protrusions; sometimes lateral sides are nearly smooth ( Figure 8A ). Rostral rami widely spaced, tapering at tips; tips occasionally convergent ( Figure 8G–I ). Genital double-somite of female with oval-elongate plug ( Figure 8D, E ). Anal somite shorter than two preceding somites together ( Figure 8B, C ), dorsal side only slightly swollen ( Figure 8D, E ). Caudal rami in dorsal view 2.9–3.1 times longer than anal somite and eight times longer than wide ( Figures 8B, C ). Antennule exceeding caudal rami by two to three segments. Medial seta of exopodal segment 2 of P5 attenuate, very thin at tip ( Figure 8J ).

Male

Total length 5.7 mm. Lateral sides of cephalosome without pointed protrusions ( Figure 9A ). Antennule of 21 articulated segments, segment 18 is the longest ( Figure 9D, E ). First exopodal segment of right P5 as long as or slightly longer than the second exopodal segment. Second endopodal segment without hairs; basipod with medial projection ( Figure 9G ). Basipod of left P5 medial-distally with a moderate projection with marginal teeth; exopodal segment 3 elongate oval-triangular ( Figure 9F ). P5 of males from the north-western Pacific Ocean and Southern Ocean identical in structure.

Remarks

Published size of females: 8.2 mm ( Sars 1924); 7.65–8.75 ( Heptner 1986). Published size of males: 6.0–8.0 ( Brodsky 1950) and 7.00– 7.50 mm ( Heptner 1986). Females of L. wolfendeni are distinguished from both L. grandis and L. bradyana by a shorter anal somite which is not swollen; a large oval-elongate plug of the genital double-somite; the usually smoothly rounded or low-triangular lateral sides of the cephalon and larger sizes; males differ in the structure of left and right basipods and left endopod of P5 as discussed for L. grandis ( Figures 2F–K , 6 , 7, 9F, G), and larger size. One female specimen had asymmetrical caudal rami. In other diagnostic character states, this specimen corresponds to L. wolfendeni . A specimen with asymmetrical caudal rami was reported earlier ( Wolfenden 1911, as L. grandis ) but correctly considered to be L. wolfendeni by Heptner (1971).

Distribution

Lucicutia wolfendeni is found in all oceans except the Arctic Ocean ( Hulsemann 1966, p 738; Heptner 1986, Tables 1–3).

Figures

Figure 2. Lucicutia grandis. Male. (A) Habitus, dorsal; (B) urosome, left lateral; (C) rostrum, anterior; (D) 14–17 articulated segments of antennule; (E) 18–21 articulated segments of antennule; (F, G) P5 left; (H) P5 right exopod; (J, K) P5 right; (I) P5 right coxopod, basipod and endopod. (A–F, H–J) Arabian Sea, Thomas Thompson cruise TN050; (G, K) Arabian Sea, Anton Bruun cruise 2, station 108-549. Scale bars: 0.1 mm (A–F, H–J); 0.5 mm (G, K).

Figure 6. Lucicutia bradyana. Male. (A, B) P5, specimen identified by Hulsemann (1966) as Lucicutia rara, Indian Ocean, Anton Bruun cruise 6, station 355C: (A) right, (B) left legs; (C, D) P5, holotype of Lucicutia rara, NMNH 113545. Scale bars: 0.1 mm.

Figure 8. Lucicutia wolfendeni. Female. (A) Anterior part of cephalosome, dorsal; (B, C) urosome, dorsal; (D–F) urosome, right lateral; (G–I) rostrum, anterior; (J) P5. (A, C, F, I, J) south-eastern Pacific Ocean, Eltanin cruise 10, station 868; (B, D) north-western Pacific Ocean, off Kamchatka, Severnyi Polyus station 1; (E, H) south-eastern Pacific Ocean, Eltanin cruise 11, station 911; (G) south-eastern Pacific Ocean, Eltanin cruise 10, station 874. Scale bars: 0.1 mm.

Figure 9. Lucicutia wolfendeni. Male. (A) Anterior part of cephalosome, dorsal; (B) posterior corners of prosome and urosome, dorsal; (C) same, left lateral; (D) 15–17 articulated segments of antennule; (E) 18–21 articulated segments of antennule; (F) left P5; (G) right P5. (A–E) South-eastern Pacific Ocean, Eltanin cruise 10, station 868; (F, G) north-western Pacific Ocean, off Kamchatka, Severnyi Polyus station 1. Scale bars: 0.1 mm.