Species Card of Copepod
Monstrilloida ( Order )
    Monstrillidae ( Family )
        Cymbasoma ( Genus )
Cymbasoma mediterranea  Suarez-Morales, Goruppi, Olazabal & Tirelli, 2017   (F)
Suarez-Morales & al., 2017 (p.1815, Descr.F, figs.F, Rem.); Grygier & Suarez-Morales, 2018 (p501: Rem.)
Species Cymbasoma mediterranea - Plate 1 of morphological figuresIssued from : E. Suarez-Morales, A. Goruppi, A. de Olazabal & V. Tirelli in J. Nat. Hist., 2017, 51 (31-32) [p.1816, Fig.7].
Female (Trieste): a-b, habitus (lateral and dorsal, respectively); c, cephalic region showing preoral ornamentation (ventral); d, frontal area and right A1 with armature (dorsal); e, cephalic region showing preoral ornamentation (lateral); f, urosome and P5 (ventral); g, same (dorsal); h, same (lateral).
Scale bars: 200 µm (a, b); 50 µm (c-h).

- Cephalothorax representing 58.7 % of total body length (caudal rami excluded)
- Midventral oral papilla located at 14 % of cephalothorax length.
- Pair of large ocelli present, pigment cups moderately developed, medially separated by less than half of one eye diameter, pigmented only on inner margin; ventral cup slightly larger than lateral cups.
- Cephalic area with strongly produced forehead, ornamented..
- Frontal sensilla absent.
- Cephalic section not constricted, but narrower than medial part of cephalothorax.
- Paired ventral papilla-like processes between A1 bases with few adjacent transverse striae (arrow in Fig.7e)
- Nipple-like processes on preoral surface surrounded by striae arranged in incomplete concentric pattern (Fig. 7c).
- Urosome with 3 somites, together representing 18 % of total body length. Relative lengths of urosomites 34.2 : 42.4 : 23.4 = 100.
- 5th pedigerous somite subrectangular with shallow striation on dorsal surface (Fig. 7g).
- Genital double-somite with globose anterior part; somite with anteroventral protuberance visible in lateral view (Fig. 7 g, h), with shallow ventral suture line and small rounded posterolateral process (arrow in Fig. 7h).
- Caudal ramus subquadrate, armed with 3 subequally long, sparsely setulated caudal setae.
- Ovigerous spines paired, representing 47 % of total body length, reaching well beyond distal end of caudal setae. Spines basally separated, slender, straight at their base and along shaft, without distal expansions and tapering distally, both spines subequally long.
- Anal somite unconstricted, with smooth dorsal and ventral surfaces.
- A1 relatively short, not divergent, representing about 19 % of total body length and 30 % of cephalothorax length. A1 4-segmented, all segments completely separate. Distal segment relatively short, representing 37 % of A1 length.
- P5 basally separate, represented by a single subrectangular lobe armed with 3 subequally long biserially setulated setae on distal position (Fig. 7f).

NZ: 1

Distribution map of Cymbasoma mediterranea by geographical zones
E Medt. (Adriatic Sea : Harbour of Trieste, Aegean Sea: Emborios Bay)
N: 3
(1206)* F: 1,04; [F: 1,04]
* Total length from the end of the anterior cephalothorax to theposterior end of the anal somite.

After Suarez-Morales & al. (2017, p.1817) this new species was originally described as C. tumorifrons by Isaac (1974) from Emborios Bay (Aegean Sea). He determined that the males and females collected belonged to the same species, based on its co-occurrence in the same sample. In the redescription of the males, Suarez-Morales (1999) argued that the name, published by Isaac (1974) was, nomenclaturally unavailable and it was explicity deemed as a nomen nudum there. Cymbasoma tumorifrons have to be attributed to Suarez-Morales (1999). This name, however, exclusively refers to the male type specimens, thus excluding the females mentioned by Isaac (1974). The adult females designated as allotype and paratypes by Isaac (1974) are not part of the type specimens of C. tumorifrons, and, thus, represent an undescribed species. A redescription of these female specimens was published by Suarez-Morales (2002), who at that time attributed these females as C. tumorifrons based on Isaac's type specimens, plus a female found in Toulon Bay. A comparison of the original illustrations by Isaac (1974) and Suarez-Morales (2002) redescription of these female specimens from the Aegean Sea and Toulon Bay allowed us to determine that our specimen from Trieste clearly belongs to the same species.
Cf Table 2 from Lian & Tan (2019) in C. cheni.
Last update : 19/06/2023
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed April 25, 2024]

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