Abana arnetti Young, 1968

Abana arnetti Young, 1968 View in CoL

( Figs. 4 View FIGURE 4 , 5 View FIGURE 5 )

Abana arnetti Young, 1968: 150 View in CoL [n. sp.].

Diagnosis. Body coloration ( Figs. 4A–D View FIGURE 4 , 5A, B View FIGURE 5 ) mostly dark yellow and brown; anterior portion of crown ( Fig. 4A, C View FIGURE 4 ) and dorsal portion of frons ( Fig. 4B, D View FIGURE 4 ) with light coloration, continuously darker ventrally; pronotum ( Figs. 4A, C View FIGURE 4 , 5A View FIGURE 5 ) castaneous, darker near anterior margin; forewing ( Fig. 4A–D View FIGURE 4 , 5A–D View FIGURE 5 ) coloration not sexually dimorphic. Crown anterior margin ( Fig. 4A, C View FIGURE 4 ) broadly rounded; anterior portion ( Fig. 4B, D View FIGURE 4 , 5B View FIGURE 5 ), in lateral view, straight, not inflated; disk without a distinct depression; M-shaped elevation bordering posterior margin absent. Connective ( Fig. 4G View FIGURE 4 ) arms almost parallel; base of arms with a V-shaped dorsal rim. Style ( Fig. 4G View FIGURE 4 ) with apodeme wide and long, 0.8 times as long as apophysis length; inner lobe rounded; apical portion almost as wide as long; extending as far as connective apex. Aedeagal shaft ( Fig. 4H–J View FIGURE 4 ) with anterodorsal projections wide and short. Dorsal connective ( Fig. 4H–J View FIGURE 4 ) sclerotized; submedian acute process conspicuous.

Redescription. Total length: males (n = 2) 18.5–18.7 mm, females (n = 1) 20.4 mm (excluding ovipositor), 21.2 mm (including ovipositor).

External structures. Crown ( Figs. 4A, C View FIGURE 4 , 5A View FIGURE 5 ) without pubescence; anterior margin broadly rounded; in lateral view, anterior portion ( Fig. 4B, D View FIGURE 4 , 5B View FIGURE 5 ), straight, not inflated, forming an acute angle with frons; disk without a distinct depression; posterior margin M-shaped elevation absent. Ocelli located on imaginary line between anterior eye angles; each slightly closer to adjacent anterior eye angle than to midline. Frons flattened medially. Pronotum ( Figs. 4A, C View FIGURE 4 , 5A View FIGURE 5 ) surface without pubescence. Forewing ( Figs. 4A–D View FIGURE 4 , 5A, B View FIGURE 5 ) with punctures arranged in lines bordering veins; base of fourth apical cell aligned or slightly more distal than base of third apical cell. Hind legs with femoral setal formula 2:0:0 or 2:1:0. Other characters as in generic description.

Coloration. Body coloration ( Figs. 4A–D View FIGURE 4 , 5A, B View FIGURE 5 ) mostly brown; brochosome cover may give a blue to purple tinge to most of wing. Crown ( Figs. 4A, C View FIGURE 4 , 5A View FIGURE 5 ) dark yellow, except for two triangular brown maculae on posterior portion extending from antennal ledges to midline of crown on posterior margin. Frons ( Figs. 4B, D View FIGURE 4 , 5B View FIGURE 5 ) with upper two-thirds dark yellow, continuing yellow area of crown; ventral third brown, as well as clypeus. Gena ( Figs. 4B, D View FIGURE 4 , 5B View FIGURE 5 ) with anterodorsal portion brown, continuing brown area of crown to frons and clypeus; posteroventral portion dark yellow. Pronotum ( Figs. 4A, C View FIGURE 4 , 5A View FIGURE 5 ) castaneous, except for broad brown anterior marginal stripe; thorax ( Figs. 4B, D View FIGURE 4 , 5B View FIGURE 5 ), in lateral view, mostly dark yellow, with some brown areas of variable sizes on all pleural sclerites. Forewing ( Figs. 4A–D View FIGURE 4 , 5A, B View FIGURE 5 ) dark brown, lighter basally. Legs ( Figs. 4B, D View FIGURE 4 , 5B View FIGURE 5 ) almost completely brown; coxae of all legs, each with a dark yellow macula. Abdomen brown, with dark yellow areas, mostly at lateral margins.

Male terminalia. Pygofer ( Fig. 4E View FIGURE 4 ) ventral margin, in lateral view, with distinct median concavity, preapical region convex. Subgenital plates ( Fig. 4E View FIGURE 4 ), in lateral view, ending clearly before pygofer apex. Connective ( Fig. 4G View FIGURE 4 ) with arms almost parallel; base of arms with a V-shaped dorsal rim. Style ( Fig. 4G View FIGURE 4 ) with apodeme wide and long, 0.8 times as long as apophysis lenght; inner lobe rounded; angle formed between preapical lobe and apical portion almost right; apical portion subquadrate, almost as wide as long; extending as far as connective apex. Aedeagal shaft ( Fig. 4H–J View FIGURE 4 ), in lateral view, with preapical dorsal spiniform process almost attaining (lectotype) or not dorsal margin of lateral projections; anterodorsal projections broad and short. Dorsal connective ( Fig. 4H–J View FIGURE 4 ) sclerotized; submedian acute process conspicuous. Other characters as in generic description.

Female terminalia. Abdominal sternite VII ( Fig. 5C View FIGURE 5 ), in ventral view, with a pair of lateral dentiform projections on median third of posterior margin; area in between lateral projections projected posteriorly as a bifurcate process. Second valvula ( Fig. 5G View FIGURE 5 ), in lateral view, with 82 separated teeth on dorsal margin. Gonoplac ( Fig. 5I View FIGURE 5 ) apex rounded. Other characters as in generic description.

Distribution. Panama (Colón and Panamá Oeste provinces). Before this work, this species was known for Barro Colorado Island ( Panamá Oeste Province) and Gatún (Colón Province) in Panama ( Young 1968), here, its distribution is expanded to Gamboa in Colón ( Fig. 30 View FIGURE 30 ).

Material examined. Type material: Holotype, ♂ (examined based on photographs of habitus and terminalia): PANAMA: Panamá Oeste: Barro Colorado Island , C.Z., 1944-xi-22–24, at light, R. H. Arnett, Jr. ( USNM) . Other specimens: PANAMA: Colón: 1 ♂, 1 ♀ Gatun C. Z., Tres Rios plantation, 1930-iii, T . O. Zschokke ( NCSU) ; 1 specimen without abdomen, Gamboa, Canal area, Pipeline Road , 3 km NW Gamboa, 1995-iv-09, C. Stockwell ( BYU) .

Remarks. Abana arnetti is similar to A. ochracea sp. nov.; however, it can be distinguished from the latter by the following characters: (1) anterior margin of crown ( Fig. 4A, C View FIGURE 4 ) broadly rounded (subtriangular to triangular in A. ochracea sp. nov., Fig. 15A, C View FIGURE 15 ), (2) crown disk ( Fig. 4A, C View FIGURE 4 ) without a depression (present in A. ochracea sp. nov., Fig. 15A, C View FIGURE 15 ), (3) male pygofer ( Fig. 4E View FIGURE 4 ) with a preapical concavity on ventral margin (absent in A. ochracea sp. nov., Fig. 15E View FIGURE 15 ), (4) base of connective arms ( Fig. 4G View FIGURE 4 ) with a dorsal V-shaped rim (rim absent in A. ochracea sp. nov., Fig. 15G View FIGURE 15 ), (5) style ( Fig. 4G View FIGURE 4 ) with apical portion as long as wide (twice longer than wide in A. ochracea sp. nov., Fig. 15G View FIGURE 15 ), (6) apodeme of style ( Fig. 4G View FIGURE 4 ) wide and long (narrow and short in A. ochracea sp. nov., Fig. 15G View FIGURE 15 ), and (7) dorsal connective ( Fig. 4H–J View FIGURE 4 ) sclerotized with a conspicuous submedian acute anterior process (inconspicuous in A. ochracea sp. nov., Fig. 15H View FIGURE 15 ). The general coloration ( Figs. 4A–D View FIGURE 4 , 15A–D View FIGURE 15 ) of the two species is somewhat similar, however, A. arnetti can be clearly distinguished by its general dull yellow and mostly brown coloration, and by the coloration of the pronotum ( Fig. 4A, C View FIGURE 4 ), being completely brown (ochraceous yellow in A. ochracea sp. nov., Fig. 15A, C View FIGURE 15 ). No barcode sequence information was obtained for this species because specimens were very old.