Metrichia tatianae, Harris & Armitage, 2023

Harris, Steven C. & Armitage, Brian J., 2023, The Trichoptera of Panama XXII. Sixteen new microcaddisfly species (Trichoptera, Hydroptilidae), ZooKeys 1174, pp. 35-74 : 35

Metrichia tatianae sp. nov.

Fig. 14

Type locality.

Panama: Panama Oeste Province: Cuenca 138; Chame District; Altos de Campana NP; Río Sajalices; PSPSCB-PNAC-C115-2018-030; 8.67625°N, 79.89748°W; 194 m a.s.l.

Type specimen.

Holotype: male, Panama: Panama Oeste Province: Cuenca 138; Chame District; Altos de Campana NP; Río Sajalices; PSPSCB-PNAC-C115-2018-030; 8.67625°N, 79.89748°W; 194 m a.s.l.; UV light trap; E. Pérez, C. Nieto, M. Molinar, T. Ríos, leg.; 29.v.2018; MIUP-012-T-2023 (in alcohol).

Diagnosis.

This species shares a number of character states with M. haranga Oláh & Johanson from Peru, both of which have segment X elongate and dorsolateral hooks, as well as a pair of apical phallic spines. However, in M. haranga these phallic spines are subapical in position, compared to apical in M. tatianae sp. nov., and the inferior appendage in M. tatianae sp. nov. is not triangular as seen in M. haranga , but rather ovoid with the posterior margin incised and much more spinose.

Description.

Male. Total length 2.1 mm, 20 antennal segments, wings and body brown in alcohol, abdominal terga without modifications. Genitalia. Abdominal segment VII annular with short ventromesal process. Segment VIII triangular, tapering ventrally; in ventral view deeply incised mesally; in dorsal view quadrate. Segment IX in lateral view triangular, truncate posteriorly, tapering anteriorly into segment VII. Preanal appendage (cercus) oval in lateral and dorsal views. Dorsolateral hook in lateral view very long, thin, tapering to acute apex; in dorsal view wide basally, tapering to acute apices. Segment X very long in lateral view, wide basally and setose, then tapering to acute apex; in dorsal view triangular, apex divided into two tapering processes. Inferior appendage in lateral view somewhat quadrate, narrow at base then widening dorsally, tapering distally to apex which is deeply incised on posterior margin; in dorsal view ovoid, numerous peg-like setae on the mesal surface; in ventral view inner margins diverging, outer margins curved, posterior margins with pointed process. Phallus in dorsal view thin and elongate, pair of separated apical spines mesally; in lateral view, subapical spine shorter than apical spine, both curving upward, phallus apex with small sclerotized spike.

Distribution.

Panama.

Etymology.

This species is named for Tatiana I. Arefina-Armitage, who completed many of the illustrations in this paper and also did much of the editorial work. We also recognize her lifetime of contributions to Trichopterology.

Figures

Figure 14. Metrichia tatianae sp. nov., male holotype, genitalia A left lateral B dorsal C ventral D phallus, dorsal E phallus apex, left lateral.