Cymbasoma rostratum - Species Card - Marine Planktonic Copepods

Cymbasoma rostratum T. Scott, 1904 (F)

Taxonomy

Order Monstrilloida

details

Family Monstrillidae

details

Genus Cymbasoma

details list species for this Genus

Abbreviations or symbols

Synonymy

Thaumaleus rostratus T. Scott, 1904 (p.250, Descr.F, figs.F); van Breemen, 1908 a (p.216, figs.F); Isaac, 1975 (p.3, 9, fig.F);
Cymbasoma rostrata : Rose, 1933 a (p.350, figs.F)

References

List of the studied authors

Rose, 1933 a (p.350, fig.F); Grygier & Suarez-Morales, 2018 (p.499: Rem.).

Figures

Plate 1 issued from : T. Scott in Rep. Fishery Bd Scotl., 1904, 12 (3). [Pl. XIV, fig.5]. As Thaumaleus rostratus.
Female (from Lerwick Harbour, Shetlad): 5, habitus (dorsal).

Nota : 1st cephalothoracic segment moderately stout, tapering gradually in front into a blunt pointed rostrum, while posteriorly the body becomes gradually narrower towards the distal extremity.

Species Cymbasoma rostratum - Plate 2 of morphological figures

Plate 2 issued from : T. Scott in Rep. Fishery Bd Scotl., 1904, 12 (3). [Pl. XIV, figs.6-8]. As Thaumaleus rostratus.
Female: 6, A1; 7, P5; 8, abdomen and caudal rami.
Abdomen 3-segmented ; 1st segment as large as the next two together, but the 2nd very small.
caudal rami each with 3 setae of moderate lengths
A1 short and moderately stout, 4-segmented and sparingly setiferous ; 1st and 3rd segments small, 2nd about one and a half times the length of the 3rd, while the last equal to the entire length of the other’ 3 segments.
P5 short and foliaceous, and each terminates in two unequal lobes ; the outer lobe, which is narrower than the inner and projects somewhat beyond it, furnished with 3 moderately long setae ; the inner lobe broadly rounded and provided with a single seta.

Complementary References

List of the studied authors

Grygier, 1995 a (p.20, 21,75); Holmes, 2001 (p.61)

Distribution

NZ: 1

Distribution map of Cymbasoma rostratum by geographical zones

Localisations

Geographical glossary

Shetland Is., W Ireland

Quotations

N: 3

Dimensions (mm)

References of the authors concerning dimensions

(727) F: 3,9; {F: 3,90}

Remarks

Isaac (1975) suggests that Thaumaleus similirostratus could be the male of this species.
After Grygier & Suarez-Morales (2018, p499) it is possible that the specimen from the Lundy Island area ( off Bristol Channel) from Issac, 1974 as Thaumaleus similirostratus (= Cymbasoma similirostratum) is the male of this species, and proposed to maintain the appellation similirostratum (Isaac, 1974) for this species. (see art. 11.5 and 15.1 in the ICZN.

Last update : 12/02/2020

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