Species Card of Copepod
Monstrilloida ( Order )
    Monstrillidae ( Family )
        Monstrilla ( Genus )
Monstrilla humesi  Suarez-Morales, 2001   (F)
Suarez-Morales & Escamilla, 2001 (p.1439, figs.F, Rem.); Suarez-Morales, 2011 (p.9)
Species Monstrilla humesi - Plate 1 of morphological figuresissued from : E. Suarez-Morales & J.B. Escamilla in J. Nat. Hist., 2001, 35. [p.1440, Fig.3].
Female (Laguna de Chelem, Yucatan): A, C, habitus (ventral and dorsal, respectively); B, left A1 (dorsal view); E, left P3 (showing long basipodal outer seta); F, outer apical exopodal seta of P3.
Nota: Cephalothorax representing about 50 % of total body length. Oral papilla not prominet, located medially, about 23 % of ventral marin from anterior end of cephalothorax.Ventral ocelli absent; dorsal ocelli present, rounded in dorsal view, pigment cups relatively large, poorly developed, relatively widely separated from each other by gap equal to diameter of ocellus. 2 sensilla located on forehead between antennular bases, visible in dorsal view. A1 4-segmented (but purported segments 2-4 partially fused), relatively long, representing about 27 % of total body length, and 53 % of cephalothorax length; distal setae unbranched; length ratio antennular segments (from proximal to distal) 17.1:30.8:15.4:36.7 = 100. Head and 1st pedigerous somite fused.

Species Monstrilla humesi - Plate 2 of morphological figuresissued from : E. Suarez-Morales & J.B. Escamilla in J. Nat. Hist., 2001, 35. [p.1441, Fig.4].
Female: A, habitus (lateral); B, forehead (dorsal); C, anal somite with caudal rami (ventral); D, 5th pedigerous somite with P5, and genital double somite with ovigerous spines (ventral); E, idem (lateral).
Nota: P5 bilobed, outer lobe about 2 times as long as inner one, with 3 terminal setae subequal in length, lightly setulated; inner lobe armed with 1 terminal seta. Urosome consisting of 5th pedigerous somite, genital compound wsomite, and 2 free abdominal somites; ratio of lengths of 5th pedigerous somite to anal somite 25.1:50.1:16.6:8.4 = 100. Genital double somite bearing pair of short ovigerous spines, separate at base., thick in proximal 2/3 and slender distally, with scattered cuticular scars on proximal 1/3. Caudal rami about 2 times as long as wide, not divergent, bearing 4 setae.

Species Monstrilla humesi - Plate 3 of morphological figuresissued from : E. Suarez-Morales & J.B. Escamilla in J. Nat. Hist., 2001, 35. [p.1442].
Female: Armament formula of swimming legs.

NZ: 1

Distribution map of Monstrilla humesi by geographical zones
G. of Mexico (Yucatan: Laguna de Chelem)
N: 1
(862) F: 0,75; {F: 0,75}
Rem.: Sampling depth: 0-1.2 m.
This species resembles M. helgolandica and M. gracilicauda, but can be separated from these by the struture of P5.
Last update : 20/01/2015
    to add your remark

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

Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2017. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en 
[Accessed February 24, 2017]

© copyright 2005-2017 CNRS, UPMC

CNRS   Observatoire Océanologique de Banyuls sur Mer - Laboratoire Arago
UPMC - Paris Universitas


Version française
English version



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