Species Card of Copepod
Monstrilloida ( Order )
    Monstrillidae ( Family )
        Caromiobenella ( Genus )
Caromiobenella hamatapex  (Grygier & Ohtsuka, 1995)   (F)
Syn.: Monstrilla sp. Sekiguchi, 1982 (p.26, figs.F)
Monstrilla hamatapex Grygier & Ohtsuka, 1995 (p.703, figs.F, N); Chihara & Murano, 1997 (p.1002, Pl.234: F); Ferrari & Dahms, 2007 (p.15, Rem. N); Suarez-Morales, 2011 (p.8, 11); Chang C.Y., 2014 (p.207, Redescr. F, figs F, Rem.;
Ref.:
Jeon & al., 2018 (p.47, fig.11, 12, Rem. p.63)
Species Caromiobenella hamatapex - Plate 1 of morphological figuresissued from : M.J. Grygier & S. Ohtsuka in J. Crustacean Biol., 1995, 15 (4). [p.710, Fig.5]. As Monstrilla hamatapex.
Female (from Tanabe Bay, Japan): A, habitus (lateral; most setae omitted from appendages); B, idem (dorsal; setae omitted from A1); C, anterior end (ventral); D, right A1 (lateral view); E, posterior part of urosome (dorsal); setules omitted from all but 2 of longer caudal setae.
Abbreviations (for D, see Fig.6): an = A1 or 1st segment thereof; cg = cerebral ganglion; e, cup of nauplius eye; gs = anterior part of genital double-somite; op = oral papilla; os = ovigerous spines; ps = pit setae; s = simple seta; dc = scars.
Scale bars in mm.


Species Caromiobenella hamatapex - Plate 2 of morphological figuresissued from : M.J. Grygier & S. Ohtsuka in J. Crustacean Biol., 1995, 15 (4). [p.712, Fig.6]. As Monstrilla hamatapex.
Female: Semischematic diagram of newly devised nomenclature of basic setal armature of A1 in female monstrilloid copepods. it is drawn in dorsal view and a little from the medial side, assuming the antennule is held in its typical orientation, pointing straight forward from the head.
There are 4 main kinds of setae: Short, tapered, often spinelike setae (1-6) are arranged more or less medially in clusters of 1-5-1-5-1-2 from proximal to distal; in each group of 5, two are more dorsal (d1-2) and three more ventral (v1-3); Long, setulose, straplike setae (II-V) are associated with the first type in groups of 0-1-2-2-3-0, respectively, and are directed dorsally (d), ventrally (v), or, in one case, medially (m). There are 2 aesthetascs (aes), 1 of them ventral (4aes), the other apical (6aes). There are 6 setae (b) of variable form subapically on the antennule's outer edge; the three more dorsal ones are often highly branched (b1-3); of the others, the middle one may be slightly branched (b5) and two are simple (b4, b6). In some species, like M. hamatapex, none of the b-setae are branched (see Fig.5D


Species Caromiobenella hamatapex - Plate 3 of morphological figuresissued from : M.J. Grygier & S. Ohtsuka in J. Crustacean Biol., 1995, 15 (4). [p.713, Fig.7]. As Monstrilla hamatapex.
Female: A, right P1 and coupler (posterior view); B, right P2 and coupler (anterior view); ; probable length of broken seta of basis shown as dashed on left leg 2); C, left P3 with short seta on basis (arrow) (posterior view); D, left P4 and coupler (posterior view); E, basis of right P2 (posterior view; enlarged from C, showing sclerite between basis and exopod (arrow)); F, basis of right P2 (anterior view enlarged from B); G, outer apical seta and spinelike seta of exopod of right P4 (posterior view); H, P5 (anterior view, showing aberrant inner seta on right leg.
Scale bars in mm.


Species Caromiobenella hamatapex - Plate 4 of morphological figuresissued from : M.J. Grygier & S. Ohtsuka in J. Crustacean Biol., 1995, 15 (4). [p.718, Table 1]. As Monstrilla hamatapex.
Differences between M. hamatapex and European M. helgolandica

Species Caromiobenella hamatapex - Plate 5 of morphological figuresissued from : M.J. Grygier & S. Ohtsuka in Zool. J. Linnean Soc., 2008, 152. [p.499, Fig.29]. As Monstr(illa hamatapex.
Female: Dorsal and lateral pore and pit seta patterns, from rear of cephalothorax through genital compound somite.
Symbols: dots (three sizes) = pores; larger circles = pits of pit setae.
Pattern based on SEM and light microscopical examination.


Species Caromiobenella hamatapex - Plate 6 of morphological figuresIssued from : C.Y. Chang in Anim. Syst. Evol. Divers., 2014, 30 (3). [p.211, Fig.3]. As Monstrilla hamatapex.
Female: A, habitus (dorsal); B, habitus (lateral) .
Scale bars: A = 200 µm; B = 300 µm.

- Cephalothorax accounting for about 45 % of body length. Dorsal surface ornamented with several sensory pores o, anterior end of cephalothorax, flanking 2 pairs of large pores posteriorly, then with 1 transverse row of 4 small pôres at level of anterior quarter of cephalothorax; 4 pairs of small pores situated middorsally just behind midlength of cephalothorax, these being furnished with subcuticular ducts; 4-5 pairs of sensilla present dorsolaterally near posterior margin of cephalothorax.
- Nauplius eye consisting of 1 anteroventral and 2 layrtal small cups, widely separated from each other in dorsal view.
- Oral papilla situated slightly anterior to midlength of cephalothorax (42.4 %), slightly protruding ventrally. Weak wrinkles present around oral papilla and nipple-like scars.
- Urosome 4-urosomites plus caudal rami, accounting for about 29 % of body length (excluding caudal setae).
- Genital double-somite slightly produced outer posteriorly, with transverse wrinkles along posterior margin dorsally. Bearing paired, long ovigerous spines, inserted on middle of ventral surface, basally separated, representing about 43 % of total body length, nearly 1.5 times longer than urosome, with tips pointed, not swollen, extending far beyond tips of caudal setae.
- Anal somite trapezoidal; lacking wrinkles or striae both on dorsal and ventral surfaces; lateral margin nearly smooth, without apparent notch.
- Caudal rami a little divergent; ramus suboval, with nearly straight inner margin, about 1.3 times than wjde; furnished with 5 long plumose setae, subequal in length and breadth, and 1 slender, short, naked seta dorsal to 2nd medial seta.
- A1 short and relatively stubby, about 19 % of total body length, and about 43 % as long as cephalothorax; 2-segmented: 1 short basal segment and 1 long, compound distal segment. Basal segment bearing 1 short naked seta (seta 1) anterodistally. Distal compound segment not clearly defined, with 5 indented parts (possibly representing original segments 2-6, showing standard arrangement of long, plumose setae, 1-2-2-3-0 from proximal to distal).
- P5 single-lobed, medial margin with slight swelling representing vestige of endopodal lobe; exopod armed with 2 plumose apical and subapical setae, subequal in length.


Species Caromiobenella hamatapex - Plate 7 of morphological figuresIssued from : C.Y. Chang in Anim. Syst. Evol. Divers., 2014, 30 (3). [p.212, Fig.4]. As Monstrilla hamatapex/.
Female: A, urosome (dorsal); B, A1; C, P1; D, P3; E, outer spine and outer apical seta on 3rd exopodal segment of P3; F, P5.
Scale bars: 100 µm (A-F).


Species Caromiobenella hamatapex - Plate 8 of morphological figuresIssued from : C.Y. Chang in Anim. Syst. Evol. Divers., 2014, 30 (3). [p.213].
Female: Armature of swimming legs P1 to P4.

NZ: 1

Distribution map of Caromiobenella hamatapex by geographical zones
Loc:
Japan (Tanabe Bay, Ago Bay), Korea (East Sea, South Sea)
N: 2
Lg.:
(799) F: 2,08; (866) F: 1,5-1,8; (1208) F: 1,321-1,642; {F: 1,32-2,08}
Rem.:

For Jeon, Lee & Soh (2018, p.47, Table 1, 2, fig.11, 12 ) this species belongs to the new genusCaromiobenella, therefore it is a comb. nov., based on the molecular comparison and invertebrate hosts.
Last update : 17/09/2020
    to add your remark
  

 Any use of this site for a publication will be mentioned with the following reference :

Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2022. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed May 28, 2022]

© copyright 2005-2022 Sorbonne University, CNRS

Webmaster
CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
Sorbonne Université

 

Version française
English version

 

Search

On the WEB of CNRS

 


Marine Planktonic Copepods

Marine Planktonic Copepods

 

Imprimer Contact Accueil Plan du site Accès restreint Retour Une du Labo Imprimer Contact Plan du site Crédits Téléchargez les Plug-Ins