Remaneicaris clandestina ( Noodt, 1963 )

Corgosinho, Paulo Henrique C., Mercado-Salas, Nancy F., Arbizu, Pedro Martínez, Silva, Edinaldo Nelson Dos Santos & Kihara, Terue C., 2017, Revision of the Remaneicaris argentina - group (Copepoda, Harpacticoida, Parastenocarididae): supplementary description of species, and description of the first semi-terrestrial Remaneicaris from the tropical forest of Southeast Mexico, Zootaxa 4238 (4), pp. 499-530 : 511

Remaneicaris clandestina ( Noodt, 1963)

( Fig. 5 )

Synonyms: Parastenocaris clandestina ( Noodt 1963) ; Remaneicaris clandestina ( Jakobi 1972) ; Parastenocaris clandestina ( Löffler 1981) ; Parastenocaris clandestina ( Dussart 1984) ; Parastenocaris clandestina ( Rouch 1986) ; Parastenocaris clandestina ( Dussart & Defaye 1990) ; Parastenocaris clandestina ( Reid 1998) ; Remaneicaris clandestina ( Corgosinho & Martínez Arbizu 2005)

Material examined: Noodt's collection; P270 (locus typicus; M2, slides 18 and 20) and P275 (M3, slide 2). Locus typicus: Hyporheic zone of the margin of the Amazon River , at the city of Santarém (Pará, Brazil).

Male: Length 290 µm (Noodt's measurement). Rostrum not fused to Cph, with wide base and 2 sensilla on tip. Integumental windows not shown in Noodt's preparations. Anal operculum smooth and slightly concave. Furca as described by Noodt (1963) shorter than telson, 2.6 times longer than wide, inner margin with strong concavity, with 7 setae; setae I–III and VII at the distal 1/3 opposite to each other, size of Seta I –III impossible to observe, seta seta V the longest, seta IV longer than seta VI, seta VII approximately as long as seta IV. A1 and A2 armature and segmentation as described by Corgosinho eta al. (2007b) for R. tridactyla .. A1: 9-segmented and haplocer; armature beginning with proximal segment: 0/5/4/2/5+Ae/1/4/2/9+ Ae. A 2: with allobasis; 1-segmented exp with 1 seta, and 1-segmented enp bearing 7 setae. Md, Mx 1, Mx 2 and Mxp armature as described by Corgosinho eta al. (2005, 2007a, 2007b and 2010a) . Mx 2: of Remaneicaris type, with 2 slender setae on proximal and 3 setae on distal endite. P1 ( Noodt 1963, fig. 94): unarmed coxa; basis with an outer seta, one anterior pore and 4 spinules on outer margin, enp 2-segmented, enp-1 without ornamentation on inner margin; enp-2 with 2 distal setae, one of them geniculated; exp 3-segmented, exp-1 with an outer spine, exp-2 unarmed, exp-3 with 1 spine at midlength of outer margin, 1 distal spine on outer margin and 2 geniculated apical setae. P2 ( Noodt 1963, fig. 88); basis without outer seta, with one outer row of spinules, one anterior pore and row of spinules before insertion of enp; exp 3- segmented, exp-1 being approximately of same size of remaining exp; proximally with softly developed PRVS on outer margin, with row of spinules anterior to insertion of outer spine and an inner hyaline frill; exp-2 without armature and with one spinule located at midlength of outer margin and with row of distal spinules; exp-2 with 3 setae, distal hyaline frill on inner corner and 1 large spinule at midlength of outer margin; enp 1-segmented, with subdistal seta, 2 distal spinules and 2 outer spinules. P3 ( Fig. 5 C, D): basis with outer seta; enp 1-segmented, short, pointed, with thin tip, without ornamentation or armature; exp 1-segmented, slightly curved inwards, with proximal row of 3 large spinules and 2 distal spinules on the outer margin; distalmost spinule very strong and curved with rounded tip; without any hyaline structure; apophysis short, triangular, ending in hyaline lamella which is inwardly turned at the end of a almost straight exp, conferring to it a final angle of approximately 90° with the main exp axis; thumb is long, strong and heavily curved in “S” shape. P4 ( Noodt 1963, fig. 89): basis with outer seta and one pore on anterior margin; exp 3-segmented, exp-1 almost of same size of remaining segments and with an outer spine inserted posteriorly; with PRVS on outer margin, row of spinules anterior to insertion of outer spine and an inner hyaline frill; exp-2 without setae, with row of spinules distally and with 1 long spinule inserted at midlength on the outer margin; exp-3 with 1 apical and 1 subdistal outer seta, distal hyaline frill on inner margin and 1 larger spinule medially placed on outer margin; enp ( Fig. 5 E) shorter that half of exp1, outwardly curved and with spinules along inner margin decreasing in length from proximal to distal margin. P5: rectangular, ending in small process on inner margin; armature difficult to observe; possibly as in Noodt (1963).

Female: Sexually dimorphic in A1, P3, P4 and genital field. Length 300–310 µm (Noodt's measurement). A1, P3, P4 and genital field as in R. palaciosi .

Figures

FIGURE 5. Remaneicaris palaciosi (Noodt, 1962), male. A, P 5, Urs- 1 – 2; B, telson, and furca, lateral view. Remaneicaris clandestina (Noodt, 1963), C – E, male; F – G, female. C, P 3, ventral view; D, P 3, dorsal view; E, enp P 4; F, enp P 2; G, P 4. Scale bar = 50 µm.