Leucotrichia holzenthali, Thomson & Armitage & Harris, 2022

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

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Leucotrichia holzenthali

sp. nov.

Leucotrichia holzenthali sp. nov.

Fig. 9 View Figure 9

Type locality.

Panama: Veraguas Province: Cuenca 097; Santa Fe District; Santa Fe National Park; Río Piedra de Moler; PSPSCB-PNSF-C097-2017-011; 8.55343°N, 81.17675°W; 395 m a.s.l.

Type material.

Holotype: male, Panama: Veraguas Province: Cuenca 097; Santa Fe District; Santa Fe National Park; Río Piedra de Moler; PSPSCB-PNSF-C097-2017-011; 8.55343°N, 81.17675°W; 395 m a.s.l.; 20 Apr. 2017; A. Cornejo, T. Ríos, E. Álvarez, C. Nieto, leg.; UV light trap; in alcohol; MIUP-002-T-2021. Paratype: same data as for holotype; 1 male; UMSP.


Leucotrichia holzenthali sp. nov., is similar to L. dinamica Bueno-Soria, 2010, a species currently known only from Mexico. Both species bear a pair of large scissor-like sclerites on the apex of the phallus. Leucotrichia holzenthali can be distinguished by the additional pair of ventral sclerites on the phallus apex and the peg-like setae on abdominal sternum VIII, both characteristics that are absent on L. dinamica .


Male. Length of forewing 1.7 mm (n = 2). Wings unmodified. Head unmodified, with three ocelli; antennae unmodified. Tibial spur count 1, 3, 4. Color in alcohol brown. Genitalia. Abdominal sternum VII mesoventral process with enlarged apex (Fig. 9A, D View Figure 9 ). Sternum VIII with posteroventral production bearing prominent peg-like setae (Fig. 9A View Figure 9 ), in ventral view posterior margin concave (Fig. 9D View Figure 9 ). Segment IX anterolateral margin convex, posterolateral margin irregular (Fig. 9B View Figure 9 ); dorsally, anterior margin concave, posterior margin broadly concave (Fig. 9C View Figure 9 ). Tergum X with dorsal sclerite not apparent; ventral sclerite broadest mesally with slender ventral apex; membranous apex subtriangular in dorsal view (Fig. 9B, C View Figure 9 ). Subgenital plate with dorsal arm simple, extending posteriad, apex acute (Fig. 9B View Figure 9 ); ventral arm simple, apex with emargination, in ventral view with truncate base and rounded apical emargination (Fig. 9B, D View Figure 9 ). Inferior appendage broadest basally, with pointed basal emargination, prominent dorsal subapical seta, apex acute (Fig. 9B View Figure 9 ); ventrally broadly fused, broadest basally, apex rounded (Fig. 9D View Figure 9 ). Phallus tubular basally, constricted at midlength with median complex bearing spherical “windows”; apex membranous, bearing pair of large scissor-like apical sclerites dorsally and pair of large acute sclerites ventrally (Fig. 9E, F View Figure 9 ).




Named in honor of Dr. Ralph W. Holzenthal, for a long and robust career in caddisfly taxonomy and systematics. Dr. Holzenthal has been a friend and colleague to each of the authors, and an invaluable mentor in particular to the first author.