Ochrotrichia mariettae, Armitage & Harris & Rodriguez, 2025

Armitage, Brian J., Harris, Steven C. & Rodriguez, Viterbo, 2025, The Trichoptera of Panama XXVIII. Nine new species of microcaddisflies (Trichoptera, Hydroptilidae), Neotropical Biology and Conservation 20 (2), pp. 125-147 : 125-147

Ochrotrichia mariettae sp. nov.

Fig. 9

Type locality.

Panama: Chiriquí Province, Cuenca 102, Renacimiento District, Reserva Privada Landis, Location 1, quebrada sin nombre; 8.643769°N, 82.829479°W; 755 m a. s. l.

Type specimen.

Holotype • ♂, in alcohol. Original label: Panama: Chiriquí Province, Cuenca 102, Renacimiento District, Reserva Privada Landis, Location 1, quebrada sin nombre ; 8.643769°N, 82.829479°W; 755 m a. s. l.; 30 Dec 2022; leg M. Landis; Malaise trap ”; MUPADI . Paratype • ♂, ibid., same as holotype, except Location 2; 8.64501°N, 82.82204°W; 575 m a. s. l.; 29 Feb – 16 Mar 2020; MUPADI .

Diagnosis.

Based on the sigmoid shape of the inferior appendage which bears thick spines apically, this species is placed in the O. arranca group of Flint (1972), with some similarity to O. pulgara Harris & Armitage and O. tagala Flint , both of which have the apex of the inferior appendage modified into a thumb-like process. It differs from these species and others in the group, based on the tenth tergum which is divided distally into two short processes, one of which bears a terminal spine; and by the short inferior appendage, which is similar in appearance to those of O. amorfa Bueno-Soria and Holzenthal.

Description.

Male. Total length 2.0 mm (n = 2), 26 antennal segments, wings and body brown in alcohol. G enitalia (Fig. 9 ). Abdominal segment VII and VIII annular, the former with a small posteroventral process. Segment IX in lateral view posteriorly sinuate, tapering dorsally and ventrally, broadly incised anteriorly forming ventral knob; in ventral view, rounded posteriorly and anteriorly, notched posterolaterally; in dorsal view, with broad mesal incision. Tergum X slightly divided distally, right process narrow, bearing stout apical spike, left process wide basally, tapering to rounded apex; in lateral view, upper spinose process, narrow over length, lower process sinuate ventrally, lobate apically. Inferior appendage in lateral view sigmoid-shaped, posterodorsal finger-like process, cluster of dark rounded spikes posteroventrally; in dorsal and ventral views, wide basally, gradually tapering distally to acute, numerous thick darkened spikes on posterior margins. Phallus in ventral view, thin and elongate, apically with pair of small lateral lobes.

Female and immature stages.

Unknown.

Etymology.

Named in honour of Señora Marietta Landis, who provided permission and access to her private reserve in western Panama near the Costa Rican border and who made all of the collections, including those of this and several other new species. The name is a noun in the genitive case.

Figures

Figure 9. Ochrotrichia mariettae sp. nov., male holotype, genitalia A left lateral B dorsal C ventral D phallus, ventral.