Remaneicaris palaciosi ( Noodt, 1962 )

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 : 508-510

Remaneicaris palaciosi ( Noodt, 1962)

( Figs. 4–5 )

Synonyms: Parastenocaris palaciosi ( Noodt 1962) ; Remaneicaris palaciosi ( Jakobi 1972) ; Parastenocaris palaciosi ( Rouch 1986) ; Parastenocaris palaciosi ( Dussart & Defaye 1990) ; Remaneicaris palaciosi ( Corgosinho & Martínez Arbizu 2005)

Material examined: Noodt's collection; S64 (locus typicus), S127, S332 (K7, slides 78). Locus typicus: Acehuafa river (San Salvador, El Salvador).

Male: Length 420 µm (Noodt's measurement). Rostrum not fused to Cph, with wide base and 2 sensillae on tip. Cph and Urs-2 with 1 dorsal integumental window. Urs-5 with belt-like integumental window along the dorsal surface. Anal operculum smooth and quadratic. Furca ( Fig. 5 B) shorter than telson, 2.75 times longer than wide, tapering distally, setae I–III and VII at the distal 1/3 opposite to each other, setae I–III approximately of same size, seta V the longest, seta IV longer than seta VI and VII, seta VI minute, aproximally as long as lateral setae, seta VII approximately 1/3 shorter than 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 ( Fig 4 A): basis with outer seta, 4 spinules on outer margin below outer seta; enp 2-segmented, enp-1 slightly shorter than exp-1 and 2 together, without ornamentation on inner margin, outer margin with 3 spinules at proximal 2/3 and 2 spinules at distal 1/3, with 2 anterior distal spinules; enp-2 with 3 spinules on outer margin,1 unipinate outer spine and 1geniculated seta 2,3 times as long as outer spine; exp 3-segmented, exp-1 with outer spine and rows of spinules on outer margin, exp-2 unarmed, with spinules on outer margin, exp-3 with 1 unipinate outer spine on distal 1/3, 1 unipinate outer spine and 2 geniculated setae, innermost seta the longest. P2 ( Fig. 4 B): basis without outer seta, ornamented with 1 row of spinules on outer margin, 1 pore near anterior margin, and 1 row of small spinules near enp insertion; exp 3- segmented, exp-1 longer than each of the remaining two segments; with PRVS on outer margin, row of spinules anterior to insertion of outer spine, 3 spinules of different sizes distal to outer spine and inner hyaline frill; exp-2 without armature, with 1 medial spinule on outer margin and row of spinules of unequal sizes at distal margin; exp- 3 with 1 medial spinule on outer margin, distal hyaline frill, 1 unipinate subapical spine and 2 bipinate apical setae, outer seta shorter than inner one; enp 1-segmented, slightly longer than 1/2 exp-1, with 1 distal smooth seta, 2 distal spinules and 2 spinules on outer margin. P3 ( Fig. 4 C and D): basis with outer seta; enp 1-segmented, short, pointed, with thin tip, without ornamentation or armature; exp 1-segmented, slightly curved, on the outer margin with row of 4 strong spinules on proximal 2/3, 3 strong spinules on distal 1/3, last spinule of distal row very strong and almost straight, without hyaline margin, inner margin with process on distal 2/3; apophysis shorter than thumb, quadratic, ending in an acuminate hyaline lamella, preceded by chitinous plate; apophysis is inwardly turned at the end of a straight exp, conferring to it a final angle of approximately 90° with the main exp axis; thumb is long, strong and almost straight. P4 ( Fig. 4 E): basis with outer seta and 1 pore on anterior margin; exp 3-segmented, exp- 1 longer than each of the remaining two segments with PRVS on outer margin, row of spinules anterior to insertion of outer spine, 3 spinules of different sizes distal to outer spine and inner hyaline frill; exp-2 without armature, with 1 spinule medially on outer margin and row of spinules of unequal sizes at distal margin (innermost spinules smaller than outermost ones); exp-3 with 1 bipinate apical seta and 1 bipinate spine inserted at 2/3 of outer margin, 1 distal hyaline frill, 1 spinule medially on outer margin, and 1 spinule at proximal 1/3 of outer margin; enp shorter that half of exp-1, curved outwards, with spinules along inner margin -decreasing in length from proximal to distal margin-. P5 ( Fig. 5 A): without intercoxal sclerite, 2 plate not fused to the somite, rectangular, ending in small process on inner margin, outer seta broken on left limb, with 3 smooth distal setae, distalmost seta the longest, proximalmost seta the shortest.

Female: Sexually dimorphic in A1, P3, P4 and genital field. Length 440 µm (Noodt's measurement). A1 armature and segmentation as described by Corgosinho eta al. (2007b) for R. tridactyla . A1: 7-segmented; number of setae beginning at proximal segment: 0/4/5/2+Ae/1/2/9+Ae. P3 ( Fig. 5 G): basis with 1 outer seta and row of spinules near insertion of enp; exp 2-segmented, exp-1 with proximal row of spinules, an outer spine and 2 longer spinules near to insertion of outer spine and row of small spinules distally; exp-2 with 1 unipinate outer spine, 1 bipinate seta and 1 spinule medially on outer margin; enp 1-segmented and spiniform, almost as long as exp-1, with 2 outer spinules on outer surface. P4 ( Noodt 1962, fig. 77): exp without sexual dimorphism; enp ( Fig. 4 F) 1- segmented, with 2 outer spinules and distal, unfused spine. Genital field with 1 medially located copulatory pore. Gonopore with transverse slit.

Figures

FIGURE 4. Remaneicaris palaciosi (Noodt, 1962), A – E, male; F, female. A, P 1; B, P 2; C, P 3, lateral view; D, P 3, ventral view; E, P 4; F, enp, P 4. Scale bar = 50 µm.

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.