Monstrilla careli - Species Card - Marine Planktonic Copepods

Species Card of Copepod

Monstrilloida ( Order )	details
Monstrillidae ( Family )	details
Monstrilla ( Genus )	details	List species for this Genus

Monstrilla careli Suarez-Morales & Dias, 2000 (F)

Abbreviations or symbols

Ref.:

(

List of the studied authors )

Suarez-Morales & Dias, 2000 (p.1031, Descr.F, figs.F); Suarez-Morales, 2001 b (p.11, Redescr.F, figs. F); Suarez-Morales & Gasca, 2004 (p.298, Rem. tab.1); Dias & Araujo, 2006 (p.96, figs.F, Rem., chart); Suarez-Morales, 2011 (p.9)

Species Monstrilla careli - Plate 1 of morphological figures

issued from : E. Suarez-Morales & C. Dias in J. mar.Biol. Ass. U.K., 2000, 80. [p.1032, Fig.1].
Female (from Rio de Janeiro: Brazil): A-B, habitus (dorsal and lateral, respectively); C, 5th pedigerous somite and genital double-somite (lateral); D, idem (ventral view). Arrow indicates convex protuberance.
Nota: Cephalothorax (incorporating 1st pedigerous somite) accounting for 64 % ofbtotal body length. Forehead flat in dorsal view, with pair of short, slender sensillae. Anteriormost part of cephalothorax with ventral, low rounded convex protuberance between oral papilla and antennular bases (arrowed in fig.1B). Oral papilla located close to anteriormost part of body, lying midventrally 0.12 of way back along cephalothorax. Nauplius eye present, weakly developed, ocelli slightly pigmented, with rounded shape; eyes separated by a distance equal to 1.6 eye diameter. P5 short, bilobed, fused medially; outer lobe about 2.2 times thicker than inner one, armed with 3 long, lightly plumose seta, subequal in length and breadth, outermost slightly longer; outer lobe setae reach distal margin of caudal rami; inner lobe small, rounded, armed with distal seta, about 25 % shorter than those of outer lobe. Urosome consisting of 5th pedigerous somite, genital double-somite, and 2 free abdominal somites. Genital double-somite with partial intersegmental division, visible in dorsal view; representing almost half the length of urosome; ratio of length 32.2:45.1:11.3:11.4 = 100. Genital double-somite bearing short ovigerous spines, basally separated, about 12.4 % of total body length , extending slightly distal margin of anal somite.

Species Monstrilla careli - Plate 2 of morphological figures

issued from : E. Suarez-Morales & C. Dias in J. mar.Biol. Ass. U.K., 2000, 80. [p.1033, Fig.2].
Female:A, right A1 (dorsal view); B, head (lateral); C, caudal rami (dorsal); D, terminal segment exopod of P1; E, terminal segment of exopod of P4; F, terminal segment of exopod of P3; G, basipodal seta of P1; H, idem on P3.
Nota: A1 4-segmented; ratio of length antennule segments 12.3:18.4:12.56:56.4 = 100.; A1 relatively long (mainly the terminal segment, more than half the length of this appendage), slightly longer than 25.3 % of total body length, and about 38 % the length of cephalothorax. Caudal rami about 2 times longer than wide, moderately divergent, bearing 2 outer, 3 terminal, and 1 dorsal setae; dorsal seta relatively long, about twice as long as rami.

issued from : E. Suarez-Morales & C. Dias in J. mar.Biol. Ass. U.K., 2000, 80. [p.1034].
Female: armature of swimming legs P1 to P4.

Compl. Ref.:

(

List of the studied authors )

Dias & Bonecker, 2007 (p.270, 272, fig.3, tab.II)

NZ:

Distribution map of Monstrilla careli by geographical zones

Species Monstrilla careli - Distribution map 2

issued from : C. de O. Dias & A.V. Araujo in Atlas Zoopl. reg. central da Zona Econ. exclus. brasileira, S.L. Costa Bonecker (Edit), 2006, Série Livros 21. [p.97].
Chart of occurrence in Brazilian waters (sampling between 10°-24° S).
Nota: sampling 28 specimens.

Loc:

(

Geographical glossary )

Brazil (Rio de Janeiro, off Vitoria-Cabo de Sao Tomé, Salvador, Recife), Caribbean Sea: Mexico (Banco Chinchorro)

Lg.:

(

References of the authors concerning dimensions )

(843) F: 3,31-3,70; (873) F: 3,5; 3,9. (without furca); {F: 3,31-3,90}

Rem.:

For Suarez-Morales & Dias (2000, p.1034) the position of the oral papilla on the cephalothorax is not a valid character to separate the genus Monstrilla because it can be found high up along the cephalothorax or on its middle section. The generic division still depends largely on the number of urosomites. Following Isaac's identification key, in which the position of the oral papilla on the cephalothorax is considered, this species would key down, incorrectly, to the genus Monstrillopsis.
The most striking difference of this species with respect to the other Monstrilla is the extremely long terminal segment of A1 (it represents more than half the length of this appendage. Another character is the extremely long dorsal seta on the caudal rami, more than twice as long as bearing ramus.

Last update : 01/12/2012


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