Polyplectropus perpendicularis Chamorro-Lacayo & Holzenthal. Several 2004
Creators: name: Chamorro, Maria Lourdes
name: Holzenthal, Ralph W.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Polycentropodidae
Polyplectropus
Polyplectropus perpendicularis

description: Polyplectropus perpendicularis Chamorro-Lacayo & Holzenthal   
Figs. 52, 128  
 Polyplectropus perpendicularis Chamorro-Lacayo & Holzenthal, 2004: 210. [Type locality: Costa Rica, Puntarenas, Río Bellavista trib., Las Alturas; UMSP; male.]   
 Polyplectropus perpendicularis can be easily identified by the L-shaped dorsal branch of the inferior appendage. This species resembles P. mignonae Bueno-Soria in the overall shape of the phallus, intermediate and preanal appendages, as well as the ventral branch of the inferior appendage. Polyplectropus perpendicularis can be distinguished from P. mignonae by the more or less truncate apex of the intermediate appendage (rounded in P. mignonae) and by the shape of sternum IX.   
 Adult. Length of forewing 5 mm, n = 1. Color of head, thorax, and legs brown; setae on body brown with clusters of grey setae on apex of head; tegulae with long erect brown setae; setae on wings brown with few scattered grey markings.   
 Male genitalia. Sternum IX in lateral view deltoid, anterior margin submedially produced, posterior margin sinuate and medially produced; in ventral view rectangular, anterior margin highly concave, posterior margin convex. Tergum X membranous, oblong, bearing dorsal microsetae; lower lip of tergum X membranous, smooth, without dorsal microsetae, digitate; in dorsal view digitate; in caudal view produced dorsad of phallocrypt. Intermediate appendage as long as inferior appendage, narrowly digitate with long setae throughout; in dorsal view digitate, linear; in caudal view digitate, directed posterad. Preanal appendage bipartite; mesolateral process setose; in dorsal view oblong, in lateral view orbicular; mesoventral process setose, in lateral view quadrate with ventrad-directed sclerotized apex, anteroventral margin straight, posterior margin truncate; in caudal view processes separated, ventral margin of process acute with sclerotized point and basally broad. Inferior appendage bipartite with anterior basal plate not extending anterad beyond sternum IX when observed in lateral view; dorsal branch setose, in lateral view L-shaped, apex truncate, bearing 2–3 sclerotized spines; in ventral view narrow, lateral margin convex, entire, posterior margin subacute, mesal margin entire, concave, expanding posterad into ventral branch; ventral branch setose, elongate, bearing a row of 4–7 robust, sclerotized spines along posterior margin; in lateral view clavate, rounded posterad; in ventral view subquadrate, posterior margin angled, gradually converging mesally. Phallus long; dorsal phallic sclerite in lateral view cylindrical, apex pandurate to oblong; apex of dorsal phallic sclerite in dorsal view emarginate; endothecal membrane without embedded spines.   
 Material Examined. COSTA RICA: Puntarenas: Río Bellavista trib[utary], Las Alturas, road to quarry, 8°57'07"N, 82°50'53"W, 1480 m, 19.iii.1991, Holzenthal, Muñoz & Huisman — 1 male [holotype] (UMSP).   
Distribution. Costa Rica.
description: Published as part of Chamorro, Maria Lourdes & Holzenthal, Ralph W., 2010, 2582, pp. 1-252 in Zootaxa 2582 on pages 104-106