Resurrection and redescription of Hatschekia cylindrica Shiino, 1957 (Copepoda, Siphonostomatoida, Hatschekiidae), with description of its developmental stages

in Crustaceana
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Hatschekia cylindrica Shiino, 1957 is resurrected and redescribed based on newly obtained specimens, and all developmental stages except copepodid II are described based on free-living larvae reared from eggs detached from ovigerous females, as well as on both sexes of copepodids III-V recovered together with adults from Pseudolabrus sieboldi Mabuti & Nakabo, 1997 (Pisces, Labridae). There are three naupliar stages preceding the infective copepodid I and the sexes are distinct after copepodid III, as in the two other species of Hatschekia studied thus far in this respect.

Resurrection and redescription of Hatschekia cylindrica Shiino, 1957 (Copepoda, Siphonostomatoida, Hatschekiidae), with description of its developmental stages

in Crustaceana

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References

FroeseR.PaulyD. (eds.) 2016. FishBase. Available online at http://www.fishbase.org/.

HumesA. G.GoodingR. U.1964. A method for studying the external anatomy of copepods. Crustaceana6: 238-240.

HuysR.BoxshallG. A.1991. Copepod evolution: 1-468. (The Ray SocietyLondon).

IzawaK.2015a. Descriptions of postembryonic developmental stages prior to adult of Hatschekia multibarbatae Izawa, 2015 (Copepoda, Siphonostomatoida, Hatschekiidae). Crustaceana88: 485-497.

IzawaK.2015b. Descriptions of the postembryonic developmental stages of Hatschekia bifurcata Yamaguti & Yamasu, 1959 (Copepoda, Siphonostomatoida, Hatschekiidae). Crustaceana88: 709-725.

JonesJ. B.1985. A revision of Hatschekia Poche, 1902 (Copepoda: Hatschekiidae), parasitic on marine fishes. N. Z. Journ. Zool.12: 213-271.

KabataZ.1979. Parasitic Copepoda of British fishes: 1-486. (The Ray SocietyLondon).

ShiinoS. M.1957. On a new species of Hatschekia (Crustacea, Copepoda) from Halichoeres poecilopterus (T. & S.). Journ. Fac. Sci. Hokkaido Univ. ser. 6 Zool.13Prof. T. Uchida Jubilee Volume: 105-108.

YamagutiS.1939. Parasitic copepods from fishes of Japan part 5. Caligoida III. Volumen Jubilare pro Prof. Sadao Yoshida 2: 443-487 pls. 14-33. (Osaka).

Figures

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    Hatschekia cylindrica Shiino, 1957, female. A, habitus, dorsal; B, posterior end of trunk and urosome, ventral; C, caudal ramus, ventral; D, rostral area and antennule, ventral; E, antenna, ventral; F, mouthparts, ventral; G, maxilla, ventral; H, leg 1, ventral; I, leg 2, ventral; J, leg 3, ventral; K, leg 4, ventral. Abbreviations: md, mandible; mx1, maxillule; oc, oral cone; pap, postantennal process; r, rostral area. Scale bars: 0.2 mm for A; 0.1 mm for B; 0.05 mm for D-G, I; 0.03 mm for C, H, J, K.

  • View in gallery

    Hatschekia cylindrica Shiino, 1957, male. A, habitus, dorsal; B, posterior portion of body and caudal ramus, ventral; C, rostral area and antennule, ventral; D, antenna, ventral; E, mouthparts, ventral; F, maxilla, ventral; G, leg 1, ventral; H, leg 2, ventral; I, leg 3, ventral; J, leg 4, ventral. Additional abbreviation: p6, leg 6. Scale bars: 0.1 mm for A; 0.03 mm for B-J.

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    Naupliar stages of Hatschekia cylindrica Shiino, 1957. A, nauplius I, ventral; B, nauplius II, ventral; C, nauplius III, ventral; D, caudal armature of nauplius II, dorsal; E, caudal armature of nauplius III, dorsal; F, antennule of nauplius I, ventral; G, antennule of nauplius II, ventral; H, antennule of nauplius III, ventral; I, antenna of nauplius I, ventral; J, antenna of nauplius II, ventral; K, antenna of nauplius III, ventral; L, mandible of nauplius I, ventral. Scale bars: 0.05 mm for A-C; 0.03 mm for D-L.

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    Copepodid I of Hatschekia cylindrica Shiino, 1957. A, body, dorsal; B, posterior somites and caudal ramus, ventral; C, antennule, ventral; D, antenna, ventral; E, mouthparts, ventral; F, maxilla, ventral; G, leg 1, ventral; H, leg 2, ventral. Additional abbreviation: p3, leg 3. Scale bars: 0.05 mm for A; 0.03 mm for B-H.

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    Copepodid III of Hatschekia cylindrica Shiino, 1957. A-I, female; A, body, dorsal; B, urosome and caudal ramus, ventral; C, rostral area and antennule, ventral; D, antenna, ventral; E, mouthparts, ventral; F, maxilla, ventral; G, leg 1, ventral; H, leg 2, ventral; I, legs 3 and 4, ventral. J-O, male; J, body, dorsal; K, abdomen and caudal ramus, ventral; L, antennule, ventral; M, leg 1, ventral; N, leg 2, ventral; O, legs 3 and 4, ventral. Additional abbreviations: cp, unidentified corpuscle; gp, bud of gonopore; p4, leg 4. Scale bars: 0.1 mm for A, J; 0.03 mm for B-I, K-O.

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    Copepodid IV of Hatschekia cylindrica Shiino, 1957. A-H, female; A, body, dorsal; B, urosome and caudal ramus, ventral; C, rostral area and antennule, ventral; D, antenna, ventral; E, mouthparts, ventral; F, maxilla, ventral; G, leg 1, ventral; H, leg 2, ventral. I-M, male; I, body, dorsal; J, rostral area and antennule, ventral; K, leg 1, ventral; L, leg 2, ventral; M, legs 3 and 4, ventral. Additional abbreviations: sp, spermatophore; st, spermatophore tubule. Scale bars: 0.1 mm for A, I; 0.05 mm for B-D, F; 0.03 mm for E, G, H, J-M.

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    Copepodid V of Hatschekia cylindrica Shiino, 1957. A-J, female; A, body, dorsal; B, urosome and caudal rami, ventral; C, rostral area and antennule, ventral; D, antenna, ventral; E, mouthparts, ventral; F, maxilla, ventral; G, leg 1, ventral; H, leg 2, ventral; I, leg 3, ventral; J, leg 4, ventral. K-Q, male; K, body, dorsal; L, posterior portion of body and caudal rami, ventral; M, rostral area and antennule, ventral; N, antenna, ventral; O, leg 1, ventral; P, leg 2, ventral; Q, legs 3 and 4, ventral. Scale bars: 0.1 mm for A, K; 0.05 mm for B-H, L; 0.03 mm for I, J, M-Q.

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