Leucotrichia rhomba Thomson & Holzenthal, 2015

Thomson, Robin E., Armitage, Brian J. & Harris, Steven C., 2022, The Trichoptera of Panama. XIX. Additions to and a review of the genus Leucotrichia (Trichoptera, Hydroptilidae) in Panama, ZooKeys 1111, pp. 425-466 : 425

Leucotrichia rhomba Thomson & Holzenthal, 2015

Fig. 13

Diagnosis.

Leucotrichia rhomba is similar to L. brochophora Flint, 1991 and L. padera Flint, 1991, two species recorded from Colombia, but not currently known from Panama. All three species share a similar appearance of the phallus apex, with no spines and either few or no externally sclerotized structures. The anterolateral margin of segment IX is also produced in all three species. Leucotrichia rhomba can be recognized by the elongate mesoventral process of segment VII, which is enlarged, rhomboid, and rugose in ventral view (Fig. 13A, B ), and by the obovoid dorsal sclerite of the phallus apex (Fig. 13E ).

Material examined.

Panama: Bocas del Toro Province • 6 males; Cuenca 093; Chiriqui Grande District; Quebrada Rambala ; Rambala Jungle Lodge ; 8.91627°N, 82.15469°W; 120 m a.s.l.; 12-15 Jun. 2017; E. Carlson, leg.; Malaise trap; in alcohol; MUPADI • ibid ., 1 male; 28-30 Jun. 2017 • ibid ., 2 males; 15-20 Nov. 2016. Chiriqui Province • 5 males; Cuenca 108; Boquete District; Quebrada Jaramillo ; Finca Monterey ; 8.7632°N, 82.41383°W; 1,214 m a.s.l.; 16-20 Jun. 2017; K. Collier, leg.; Malaise trap • ibid ., 1 male; 14-- 22 Oct. 2018. • ibid ., 5 males; Dolega District, Río Majagua, Potrerillos , Banquito de Palmira ; 8.68083°N, 82.532528°W; 840 m a.s.l.; 28 Feb.-14 Mar. 2019; T. Ríos, Y. Aguirre, leg.; MUPADI . Veraguas Province • 14 males; Cuenca 132; Santa Fe District, Santa Fe National Park , Rio Mulaba , 2do Brazo , PSPSCB-NPSF-C-097-2017-007; 8.52577°N, 81.13045°W; 623 m a.s.l.; 19-23 Apr. 2017; A. Cornejo, T. Ríos, E. Álvarez, C. Nieto, leg.; Malaise trap; in alcohol; COZEM .

Distribution.

Costa Rica, Panama.

Remarks.

The drawings of Leucotrichia rhomba in Harris and Armitage (2019) emphasize the apical phallic sclerite which is somewhat oval in shape. In Thomson and Holzenthal (2015) this sclerite is not emphasized, rather they use the basal sclerites. In Harris and Armitage (2019), these basal sclerites are indicated, but secondarily to the apical sclerite. In examining material from Panama, the apical sclerite proved to be the best character for identifying the species. The other genitalic features are similarly drawn in these two papers. The minor difference in figures could be attributed to artistic interpretation of taxonomic features.

Figures

Figure 13. Leucotrichia rhomba Thomson & Holzenthal, 2015. Male genitalia: A segments VII-X, lateral B segments VII-IX, ventral C segments VII-X, dorsal D phallus, lateral E phallus, dorsal. Modified from Harris and Armitage (2019).