Neotrichia carlsoni Harris and Armitage, 2019

Harris, Steven C. & Armitage, Brian J., 2019, The Trichoptera of Panama X. The Quebrada Rambala drainage, with description of 19 new species of microcaddisflies (Trichoptera: Hydroptilidae), Insecta Mundi 707 (707), pp. 1-54 : 12-13

Neotrichia carlsoni Harris and Armitage , new species

Fig. 12

Diagnosis. Neotrichia carlsoni is a member of the collata group of Keth et al. (2015) based on the paired apical rods of the phallus, the prominent dorsal projection of the subgenital plate and the lateral extension of segment IX. The new species is most similar to N. hiaspa (Mosely) , which is also known from the Bocas del Toro Province in Panama, based on the thin dorsal spike from segment IX, the thin, elongate inferior appendages, and the bifid phallus apex. It differs from N. hiaspa in the configuration of the subgenital plate, the shorter dorsal spike from segment IX, the longer inferior appendages, and the elongate phallic apex.

Male. Length 1.7–1.9 mm, 18 antennal segments, brown in alcohol. Abdominal segment VIII annular. Segment IX complete dorsolaterally, bearing elongate, thin dorsal spike, which is shorter than segment X, mesal process strongly curved dorsally and nearly parallel-sided, anteriorly narrowing to elongate process; dorsally fused posteriorly with segment X, narrow spikes laterally, posterior extension curving mesad to acute apex; in ventral view deeply incised on posterior margin, shallowly incised anteriorly. Tergite X rounded distally, basally fused with segment IX; in lateral view tapering posteriorly to rounded apex. Subgenital plate in lateral view wide basally, tapering distally to rounded lobe bearing stout setae, subapical ventral process with acute apex; in ventral view tapering distally to bifid apex bearing pair of stout setae, ventral process tapering sharply. Bracteoles lobate, nearly parallel-sided to rounded apex, in dorsal and ventral views rectanguloid. Inferior appendages thin and tapering distally, slightly upturned beyond midlength, extending beyond segment X; in ventral view elongate and thin, slightly curving mesally, small finger-like process basally. Phallus tubular in lateral view, constricted at mid-length and bearing thin paramere encircling shaft, apex with pair of unequal sclerotized rods, ejaculatory duct ending subapically.

Female. Unknown.

Type material. Holotype, male— Panama, Bocas del Toro Province, Quebrada Rambala, near Rambala Jungle Lodge , 3.74 km SSE Rambala, 8.91627°N and 82.15469°W, 120 m, Malaise trap, December 21–31, 2016, E. Carlson, 1 male . Paratypes. ibid., February 6–12, 2017, 1 male ; tributary of Quebrada Rambala, Rambala Jungle Lodge , 134 m, August 9, 2014, E. Carlson, 1 male ; ibid., 2 nd footbridge, near Rambala Jungle Lodge, March 28, 2015, 1 male. Chiriqui Province, Rio Caldera Boquete , Wilson Bridge road to Lucero , 8.74228°N and 82.42160°W, November 18, 2013, B. and T. Armitage, 1 male ( SCH) .

Etymology. We take great pleasure to name this species for Eric Carlson, owner and operator of Rambala Jungle Lodge, who collected this species and many other interesting caddisflies in the Quebrada Rambala watershed.

Note. As the new species is similar to N. hiaspa , we have provided new drawings ( Fig. 13 ) of a specimen found in Panama. Comparing this specimen to material from Mexico provided by Dr. Joaquin Bueno and the drawings of the holotype in Keth et al. (2015), we found considerable variation in the apical spines of the phallus and in the configuration of the inferior appendages, particularly in the ventral aspect. Material examined: Mexico, Chiapas, Cascada de Misolha, May 18, 1981, J. Bueno and H. Velasco, 1 male; Panama, Bocas del Toro Province, Quebrada Canaza @ pipeline road, May 18, 1985, R. Flowers, 1 male .

Figures

Figure 12. Neotrichia carlsoni, sp. n., Male genitalia. A) Lateral view. B) Ventral view. C) Dorsal view. D) Phallus, lateral view. E) Phallus apex, dorsal view.

Figure 13. Neotrichia hiaspa (Mosely), Male genitalia. A) Lateral view. B) Ventral view. C) Dorsal view. D) Phallus, lateral view, specimen from Panama. E) Phallus, lateral view, specimen from Mexico. F) Phallus apex, dorsal view, specimen from Panama; G) Phallus apex, dorsal view, specimen from Mexico.