|
|
 |
|
Calanoida ( Order ) |
|
|
|
Epacteriscoidea ( Superfamily ) |
|
|
|
Ridgewayiidae ( Family ) |
|
|
|
Exumella ( Genus ) |
|
|
| |
Exumella tsonot Suarez-Morales & Iliffe, 2005 (F,M) | |
| | | | | | | Ref.: | | | Suarez-Morales & Iliffe, 2005 (p.411, figs.F,M, Rem.)) |  issued from : E. Suarez-Morales & T.M. Iliffe in Bull. Mar. Sci., 2005, 77 (3); [p.412, Fig.3]. Female (from Ponderosa Cave, Purto Aventuras, Yucatan): A, E, habitus (dorsal and lateral, respectively); B, genital somite (lateral); C, urosome and caudal rami (ventral); D, caudal rami (dorsal). Nota: Rostrum strong, wide-based, triangular, rostral filaments paired, long, visible in lateral view, with pair of relatively large, oval integumental sensory vesicles and small sensillae on anterior surface. Urosome 3-segmented, (excluding caudal rami) representing 28 % of total body length. Genital double-somite representing 45 % of urosome length, slightly asymmetrical, right margin slirhtly protuberant, not expanded ventrally but laterally, associated with genital pore and genital operculum. Anal somite subrectangular, representing 28 % of urosome length. Cuticular ornamentation absent on dorsal and ventral surfaces of urosomites. Caudal rami lamelliform, symmetrical, with distal spiniform process on dorsal surface, near insertion of dorsal seta; each caudal ramus with 4 terminal, 1 dorsal, and 1 outer spiniform seta; caudal seta V (sensu Huys & Boxshall, 1991, p.30) on left ramus slightly longer than corresponding seta on right ramus.
|
 issued from : E. Suarez-Morales & T.M. Iliffe in Bull. Mar. Sci., 2005, 77 (3); [p.413, Fig.4]. Female: A, right A1 (free segments 1-17; anterior view; Roman numbers indicate ancestral antennular segments of fusions); B, idem (free distal segments 18-24); C, A2; D, Md (mandibular palp; enp = endopod, exp = exopod); E, Md (mandibular blade. Nota: A1 24-segmented, reaching posterior margin of 3rd pedigerous somite; proximal ancestral segments (indicated by Roman numerals) I-IV partially fused. Distal endopodal segment of the mandibular palp with 5 setae.
|
 issued from : E. Suarez-Morales & T.M. Iliffe in Bull. Mar. Sci., 2005, 77 (3); [p.414, Fig.5]. Female: A, Mx1; B, Mx2; C, Mxp; D, detail of distal endopodal segments of Mxp; E, P1 (anterior view). Nota: Mx1 with praecoxal arthrite bearing 9 stout spiniform setae plus 1 short seta; coxal epipodite with 10 setae, subequal; coxal endite elongated, with 4 setae; proximal basal endite lobe bearing 4 setae, distal lobe with 3 setae; endopod reduced, 1-segmented, with 5 distal setae; exopod with 10 subequal setae. mx2 indistinctly segmented, coxa and praecoxa partially fused, with 4 lobes (2 praecoxal and 2 coxal), 1st lobe with 6 setae, 2nd to 4th lobes each with 3 setae; basal segment with well-developed basal lobe bearring 4 plumose setae; endopod 3-segmented, 1st segment protuberant, with 2 setae, 2nd and 3rd segments with 2 setae each. Mxp with syncoxa armed with 6 setae, distributed in 3 groups (1, 2 and 3 setae).; basis with 4 setae in 2 groups (2 and 2 setae); endopod 5-segmented, 1st segment with 4 setae, 2nd with 4 setae, 3rd with 3 setae, 4th with 2 terminal plus1 dorsal setae, last segment with 3 distal setae.
|
 issued from : E. Suarez-Morales & T.M. Iliffe in Bull. Mar. Sci., 2005, 77 (3); [p.417, Fig.6]. Female: A, P2; B, P3; C, P4; D, P5. All appendages in anterior view. Nota: 1st endopodal segment of P5 with an outer process bifurcate at apex.
|
 issued from : E. Suarez-Morales & T.M. Iliffe in Bull. Mar. Sci., 2005, 77 (3); [p.416]. Female: Armature formula of swimming legs. Roman numerals = spiniform elements; arabic numerals = setae. Nota: The swimming legs 1 has a relatively large, subacute outer spiniform process on the 1st endopodal segment.
|
 issued from : E. Suarez-Morales & T.M. Iliffe in Bull. Mar. Sci., 2005, 77 (3); [p.418, Fig.7]; Male: A, right A1 (segments 1-15; Roman numbers indicate ancestral segments of fusions; anterior view); B, idem (distal segments 1-19); D, habitus (lateral); E, right P5; F, left P5. Nota: Urosome representing 24-26 % of total body length, symmetrical, 4-segmented; relative lengths of urosomites 21: 24: 25: 30 = 100; Caudal rami symmetrical, about 0.75 the length of anal somite, caudal seta V (sensu Huys & Boxshall, 1991, p.30) symmetrical on both caudal rami. Left A1 24-segmented, last segment of left A1 reaching posterior margin of 4th urosomite; right A1 geniculate, with 19 free segments (ancestral segments II-IV partially fused, XXI and XII-XIII fused).
| | | | | NZ: | 1 | | |
|
Distribution map of Exumella tsonot by geographical zones
|
| | | | Loc: | | | Mexico (E Yucatan Peninsula: Ponderosa Cave System) | | | | N: | 1 | | | | Lg.: | | | (965) F: 1,1; M: 0,94-0,98; {F: 1,10; M: 0,94-0,98} | | | | Rem.: | Coastal karstic cave systems, in marine waters. | | | Last update : 05/01/2015 | |
|
|
 Any use of this site for a publication will be mentioned with the following reference :
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 November 22, 2024] © copyright 2005-2024 Sorbonne University, CNRS
|
|
|
|
;)
;)
;)
;)
;){kind=small}
;)
