The Trichoptera of Panama XIV. New species of microcaddisflies (Trichoptera: Hydroptilidae) from Omar Torrijos Herrera National Park Armitage, Brian J. Harris, Steven C. Insecta Mundi 2020 2020-04-24 763 1 19 Armitage and Harris Armitage and Harris 2020 [192,838,1563,1588] Insecta Hydroptilidae Cerasmatrichia Animalia Trichoptera 4 3 Arthropoda species akanthos sp. nov.   Fig. 6   Diagnosis.This new species is difficult to place. In overall appearance it resembles the genera  Leucotrichiaand  Betrichiawithin the Leucotrichiini, but it lacks the diagnostic phallic structure of the Leucotrichiini. The phallus of the new species is tubular, without the medial constriction and median complex with dorsal “windows” and basal supports, which is characteristic of the Alisotrichiini ( Santos et al. 2016). Based on the tibial spur count of 1–3–4, 3 ocelli and an incomplete tentorial bridge with a mesal gap, and the unmodified antennae and wings, the new species is placed in  Cerasmatrichia. However, the foreleg spur is elongate rather than short, the inferior appendages are fused, and the phallus is structurally different from the typical  Cerasmatrichia. The same structures above are also characteristic of  Celaenotrichia, but this genus has an elongate ventromesal process from abdominal segment VII and an elongate tenth tergite with sclerotized bands, both of which are lacking in the new species. The new species is easily recognized by the extensive phallic spines.  Descripton.Length 2.0– 2.3 mm, head unmodified, 24 antennal segments, unmodified, tibial spurs 1–3–4, wings unmodified, and overall color brown (in alcohol). All specimens were cleared, so any color pattern was lost. Mesoscutellum with transverse suture, metascutellum pentagonal to triangular.   Male genitalia.Abdominal segment VII annular, lacking a ventromesal process. Segment VIII triangular, narrowing dorsally; in dorsal view deeply incised medially; in ventral view, more sharply incised mesally. Segment IX truncate posteriorly, bearing a series of stout setae on posterior margin, dorsal and ventral sclerites thin, anteriorly narrowing mesally; in dorsal view, deeply incised mesally, margins acute and lightly sclerotized, anteriorly nearly truncate; in ventral view, divided into a pair of lateral processes, which widen distally to truncate apices. Segment X lobate laterally, in dorsal view wide and rounded apically. Inferior appendages wide basally, narrowing distally to upturned and curving apex; in ventral view wide basally, abruptly narrowing subapically and basally fused. Subgenital plate shelflike, wide basally, narrowing distally to rounded apex; in ventral view wide basally, rounded apically. Phallus tubular in dorsal view, cluster of spines at midlength, apically narrowing and membranous, ejaculatory duct inconspicuous, in lateral view wide basally and mesally, narrowing apically, cluster of spines in mesal region.  Female and larva.Unknown.   Type material.   Holotypemale. Panama, Coclé Province, Cuenca134, Omar Torrijos Herrera National Park, Quebrada La Yayas, PSPSCB-PNGDOTH-C134-2017-004, 8.66168°Nand 80.5952°W,  602 m, Malaise trap,  22–26 March 2017, E. Álvarez, E. Pérez, and T. Ríos( COZEM).   Paratypes.ibid.,  Veraguas Province, Cuenca097, Santa Fe National Park,Afluente Río Caloveboro, PSPSCB- PNSF-C097-2017-005, 8.54318°Nand 81.16398°W,  536 m, Malaise trap,  19–23 April 2017, T. Ríos, E. Álvarez, and C. Nieto, 3 males( MIUP); ibid., Río Caloveboro, PSPSCB-PNSF-C097-2017-006, 8.55038°Nand 81.16486°W,  461 m, Malaise trap,  23–27 April 2017, A. Cornejo, T. Ríos, E. Álvarez, and C. Nieto, 1 male( COZEM); ibid.,  Cuenca132, Río Mulaba, afluente 2do Brazo, PSPSCB-PNSF-C132-2017-007, 8.52577°Nand 81.13045°W,  623 m, Malaise trap,  19–23 April 2017, A. Cornejo, T. Ríos, E. Álvarez, and C. Nieto, 2 males( MUPADI); ibid., Río Mulaba, Isleta, PSPSCB-PNSF-C132-2017-015, 8.54513°Nand 81.11970°W,  412 m, UV trap,  22 April 2017, T. Ríos, E. Álvarez, and C. Nieto, 1 male( SCH).   Etymology.  akanthosis the Greek word for spiny, referring to the spiny phallus characteristic of this species. 2609529526 2017-03-22 2017-03-26 2017-03-22 E. Alvarez & E. Perez & T. Rios Panama Cuenca 602 8.66168 National Park 5 -80.5952 Omar Torrijos 5 4 1 Cocle holotype 2609529520 2017-04-19 2017-04-23 2017-04-19 T. Rios & E. Alvarez & C. Nieto Panama Cuenca 536 8.54318 Rio Caloveboro 1 -81.16398 Santa Fe National Park 5 4 3 3 Veraguas paratype 2609529524 2017-04-23 2017-04-27 2017-04-23 A. Cornejo & T. Rios & E. Alvarez & C. Nieto Panama Cuenca 461 8.55038 Rio Caloveboro 1 -81.16486 Santa Fe National Park 5 4 1 1 Veraguas paratype 2609529538 2017-04-19 2017-04-23 2017-04-19 A. Cornejo & T. Rios & E. Alvarez & C. Nieto Panama Cuenca 623 8.52577 Brazo 1 -81.13045 Rio Mulaba 5 4 2 2 Veraguas paratype 2609529517 2017-04-22 2017-04-23 2017-04-19 T. Rios & E. Alvarez & C. Nieto Panama Cuenca 412 8.54513 Isleta 1 -81.1197 Rio Mulaba 5 4 1 1 Veraguas paratype