A new genus and new species of Ecuadorian Philopotamidae (Trichoptera) Author Holzenthal, Ralph W. https://orcid.org/0000-0003-1853-6340 Department of Entomology, University of Minnesota, 1980 Folwell Avenue, 219 Hodson Hall, St. Paul, Minnesota 55108 USA holze001@umn.edu Author Blahnik, Roger J. Department of Entomology, University of Minnesota, 1980 Folwell Avenue, 219 Hodson Hall, St. Paul, Minnesota 55108 USA Author Rios-Touma, Blanca https://orcid.org/0000-0002-3921-0908 Grupo de Investigacion en Biodiversidad, Medio Ambiente y Salud (BIOMAS), Facultad de Ingenierias y Ciencias Aplicadas, Via Nayon S / N, Campus UDLAPARK, CP 170503, Universidad de Las Americas, Quito, Pichincha, Ecuador text ZooKeys 2022 2022-08-11 1117 95 122 http://dx.doi.org/10.3897/zookeys.1117.86984 journal article http://dx.doi.org/10.3897/zookeys.1117.86984 1313-2970-1117-95 C583CC7AB2AD42048FA083C49BB088EA 54DB7D7318935384856B59FD7D22DFF4 Chimarra (Chimarra) mashpi sp. nov. Fig. 9 Type material. Holotype . Male (pinned). Ecuador: Pichincha: Quebrada Laguna, in Mashpi Lodge, 00.16693°N , 078.87122°W , 1111 m a.s.l., 23.vii.2015, Razuri , Morabowen, Hernandez , UMSP000380186 (UMSP). Paratypes . Ecuador: Pichincha: Amagusa Reserve (private), Rio Amagasu, 0.15508°N , 78.84330°W , 1160 m a.s.l., 17.i.2015, Holzenthal, Huisman, Rios-Touma , 1 male (in alcohol) (MECN); Cotopaxi: Recinto Los Laureles ( Jardin de los Suenos), stream, 0.84165°S , 79.20051°W , 473 m a.s.l., Holzenthal, Rios , Amigo, Huisman, 1 male (in alcohol) (MECN). Diagnosis. Chimarra mashpi is a distinctive species in the Chimarra (Chimarra) ortiziana group of Blahnik (1998) , most closely resembling C. colmillo Blahnik & Holzenthal, 1992, especially in the spines of the endotheca, which has an array of short spines and two longer spines near the phallotremal opening (Fig. 9F ). As compared to C. colmillo , the apical part of the inferior appendage is shorter, wider, and strongly, angularly mesally flexed (Fig. 9C-E ). In the latter respect it somewhat resembles C. pollex Blahnik & Holzenthal, 1992, which also has the dorsal projection of the inferior appendage strongly flexed, but in C. pollex the dorsal lobe of the inferior appendage is shorter, narrower, and more dorsally directed, with the flexure forming a rounded notch. Tergum X of this new species is also diagnostic, with the lateral sensilla-bearing processes subtriangular and distinctly protruding (Fig. 9B ). Figure 9. Chimarra (Chimarra) mashpi sp. nov. Male genitalia A segments IX, X, lateral B segments IX, X, dorsal C inferior appendages, oblique lateral D inferior appendage, ventral E inferior appendage, dorsal F phallus, lateral. Description. Adult. Forewing length 4.7 mm ( n = 1). Color nearly uniformly brownish black (fuscous), except femora yellowish brown and head somewhat darker, with scattered whitish setae on vertex and anteromesal setal wart. Postocular parietal sclerite relatively short (less than half diameter of eye). Third segment of maxillary palp much longer than 2nd, subequal to 5th. Male protarsal claws enlarged, asymmetrical in size and shape, outer claw longer and twisted. Male. Abdominal segment IX, in lateral view, with very pronounced sinuous extension of anteroventral margin and small apodemes from anterodorsal margin; posteroventral process moderately elongate, subacute apically. Tergum X membranous mesally, with sclerotized lateral lobes, each bearing pair of sensilla on subtriangular basolateral projection, apex of lobe with short, blunt projection. Preanal appendage short, rounded, knob-like. Inferior appendage, in lateral view, with relatively short and broad, apically rounded, dorsal process, ~ 2 x width of basal part of appendage, extending nearly straight on dorsal margin; as viewed ventrally or caudally, with dorsal process strongly and very angularly mesally flexed. Phallic apparatus with ventral margin of phallobase only weakly projecting; two phallic spines, subequal, moderately elongate; endotheca textured with small spines, also with sclerotic region with array of short spines and two more elongate spines. Phallotremal sclerite complex composed of elongate rod and ring structure and membranous structure with pair of associated wishbone-like sclerites apically. Female. Unknown. Etymology. This new species is named for Mashpi Reserve, where this species was discovered, as a recognition of efforts to preserve the highly threatened Choco-Andean Tropical Forest. Habitat notes. The streams of the Amagusa and Mashpi Reserves at this elevation (1100-1200 m a.s.l.) have higher flows between February and April. These highly forested streams are usually step-pool channels, with average flows ranging between 0.049-0.056 m3/s. Conductivity is low, ranging from 35-88 µS /cm, oxygen is close to 100% saturation, and daytime water temperature ranges from 17-20 °C.