Metridia ignota - Species Card - Marine Planktonic Copepods

Species Card of Copepod

Calanoida ( Order )	details
Metridinidae ( Family )	details
Metridia ( Genus )	details	List species for this Genus

Metridia ignota Esterly, 1906 (F)

Abbreviations or symbols

Ref.:

(

List of the studied authors )

Esterly, 1906 a (p.71, Descr.F, fig.F); Sewell, 1913 (p.354); 1948 (p.557, 563); Brodsky, 1950 (1967) (p.305, fig.F)

Species Metridia ignota - Plate 1 of morphological figures

issued from : C.O. Esterly in Univ. Calif. Publs Zool., 1906, 3 (5). [Pl.9, Fig.20].
Female (from San Diego, California): 20, forehead (lateral).

Nota: Caudal rami 6-times as long as broad and as long as the anal segment; the latter is only slightly shorter than the genital segment, and the genital segment is twice as long as the middle segment.
The basal segment of A1 has 3 straight spines, of which the middle one is the shortest.
P5 4-segmented, teminal segment with 3 bristles of about equal lengths; the 2nd segment has a spinulose bristle on the outer margin which reaches beyond the end of the last segment of the foot; the 3rd segment is provided with a stout spine on the outer margin.
Body very translucent, no pigment.

Compl. Ref.:

(

List of the studied authors )

in CalCOFI regional list (MDO, Nov. 2013; M. Ohman, comm. pers.)

NZ:

Distribution map of Metridia ignota by geographical zones

Distribution map of Metridia ignota for the Zone Indian Ocean

Loc:

(

Geographical glossary )

NE Pacif. (California: San Diego), Indian (Bay of Bengal)

Lg.:

(

References of the authors concerning dimensions )

(17) F: 5,8; {F: 5,80}

Rem.:

In vertical haul: 0-730 m. For Esterly (1906a, p.71) this species resembles Metridia princeps, but the shape of the head, the relative lengths of the urosomal segments, and P5 will distinguish the two.

Last update : 17/01/2015


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