Polyplectropus kylistos Chamorro-Lacayo & Holzenthal

Chamorro, Maria Lourdes & Holzenthal, Ralph W., 2010, 2582, Zootaxa 2582, pp. 1-252 : 118-120

Polyplectropus kylistos Chamorro-Lacayo & Holzenthal

Figs. 58, 123

Polyplectropus kylistos Chamorro-Lacayo & Holzenthal, 2004: 208 . [Type locality: Costa Rica, Guanacaste, Parque Nacional Guanacaste, Estación Pitilla, Río Orosí ; UMSP; male].

Polyplectropus kylistos resembles P. charlesi (Ross) based on the pronounced ventral median projection of sternum IX, the lobate, rounded intermediate appendage, the broadly separated ventral branches of the inferior appendage, and the overall shape of the dorsal branch of the inferior appendage. In addition, P. kylistos and P. charlesi bear peg-like setae on both branches of the inferior appendage (absent in P. exilis ). The variable forms of P.charlesi having an apically narrowed dorsal branch have subapical spines on a small membranous stalk, similar to those found in P. kylistos . However, in P. kylistos these stalked spines are located more proximal to the ventral branch. Polyplectropus kylistos also differs from P. charlesi in the deltoid, apically acute ventral branch of the inferior appendage, the narrower and more arched dorsal branch of the inferior appendage, the more acute apices of the mesoventral process of the preanal appendage, and the laterally directed endothecal phallic spines (in P. charlesi not as highly curved laterad).

Adult. Length of forewing 4.6 mm, n = 3. Color of head, thorax, and legs yellowish-brown.

Male genitalia. Sternum IX in lateral view rounded, anterior margin highly convex, posterior margin submedially concave and ventrally produced; in ventral view rectangular, anterior margin highly concave, posterior margin with pronounced median projection. Tergum X membranous, oblong, bearing dorsal microsetae; digitate; in dorsal view digitate; in caudal view membrane surrounding phallocrypt. Intermediate appendage not longer than inferior appendage, digitate, setose; in dorsal view basally broad, tapering mesally to rounded apex; in caudal view digitate, curved, directed posteromesad; median papillate lobe very small, flanking phallocrypt laterally, bearing small apical setae. Preanal appendage bipartite; mesolateral process setose; in dorsal view oblong, in lateral view orbicular; mesoventral process setose; in lateral view hook-like, with ventrad-directed sclerotized apex, ventral margin concave, posterior margin convex; in caudal view processes separated, ventral margin of process highly concave. Inferior appendage bipartite with anterior basal plate not extending anterad beyond sternum IX when observed in lateral view; dorsal branch setose, in lateral view lanceolate, curved ventrad and tapering apically into posteroventrad-directed spine; in ventral view narrow, lateral margin produced basolaterad, entire, posterior margin acute, mesal margin entire, expanding posterad into ventral branch; ventral branch setose, broad, bearing a basal membranous lobe with a robust sclerotized apical spine on a membranous stalk or stub; in lateral view digitate, narrowing posterad; in ventral view deltoid, apex cuspidate, posteromesal margin angled and sinuate, gradually converging mesally, ventral branches broadly separated mesally from each other. Phallus long; dorsal phallic sclerite in lateral view sinuate, apex narrowing apically and bent dorsad, apex with ventrad-directed, highly sclerotized point; apex of dorsal phallic sclerite in dorsal view subacute; dorsolateral arm of dorsal phallic sclerite in lateral view tapering posterad, apex rounded and turned anterodorsad; in dorsal view digitate, not extending beyond apex of phallic sclerite, apex rounded; endothecal membrane with 2 stout, sclerotized spines, directed posterolaterad.

Material examined. COSTA RICA: Alajuela: Río Pizote, ca. 5 km (air) S Brasilia, 10°58'19"N, 85°20'42"W, 390 m, 12.iii.1986, Holzenthal & Fasth — 2 males ( UMSP); Guanacaste: Parque Nacional Guanacaste, Río Orosí , Estación Pitilla, 10°59'28"N, 85°25'41"W, 700 m, 22–25.v.1990, Holzenthal & Blahnik — 1 male ( UMSP) .

Distribution. Costa Rica.