Brasilibathynellocaris, JAKOBI, 1972

Corgosinho, Paulo H. C., Arbizu, Pedro Martínez & Dos Santos-Silva, Edinaldo N., 2010, Revision of Brasilibathynellocaris Jakobi, 1972 (Copepoda: Harpacticoida: Parastenocarididae) with redefinition of the genus, Zoological Journal of the Linnean Society 159 (3), pp. 527-566 : 529

GENUS BRASILIBATHYNELLOCARIS JAKOBI, 1972

Brasilibathynellocaris Jakobi, 1972 – Jakobi (1972a: 143).

Pararemaneicaris Jakobi, 1972 , syn. nov. – Jakobi (1972a: 144).

Paraforficatocaris Jakobi, 1972 , syn. nov. – Jakobi (1972b: 245).

Type species: Brasilibathynellocaris brasilibathynellae (Jakobi & Loyola e Silva, 1962) .

Diagnosis: Parastenocarididae with dorsal integumental windows on cephalothorax and second to fifth urosomites of male (pl). Furca with seven setae (pl); setae I– III originating from almost same region (pl), anterior to seta VII (pl); seta II reduced in size, sometimes indiscernible (ap?). A1 eight-segmented in male (pl), seven-segmented in female (pl). Maxilla with two endites, proximal endite with one seta (pl), distal one with one spiniform and two slender setae (pl). Leg 2 endopod sexually dimorphic (pl?); long outer spine on exp-1 (ap?). Basis of male leg 3 with a strong spinule on inner margin (ap?) and a row of short and stout spinules near insertion of endopod (pl?); exopod inwardly curved, strong, ending in a long forceps formed by apophysis and outer spine of exp-1 of leg 3 (the thumb), both with a hyaline margin (ap); endopod represented by slender seta (pl). Coxa of male leg 4 with two long and strong spinules on anterior margin (ap); exp-1 reduced in length and with proximal invagination on inner corner (ap); endopod sexually dimorphic (pl). Leg 5 rectangular, with an inner process, an intercoxal plate, a basal seta, and two distal setae inserted on outer margin; no proximal exopodal seta adjacent to outer basal seta (ap?).

Species groups included: Brasilibathynellocaris can be divided into two monophyletic groups ( Fig. 24 ), which are newly proposed here:

Figures

Figure 24. Phylogeny of Brasilibathynellocaris reconstructed by hand, applying Hennigian principles and criterion of putative parsimony. Characters as explained in the text; characters binary, polarized a priori; length of cladogram = 19. Circles represent autapomorphies, open circles represent autapomorphies by reversion of character state.