Chimarra (Chimarra) mashpi, Holzenthal & Blahnik & Ríos-Touma, 2022

Holzenthal, Ralph W., Blahnik, Roger J. & Rios-Touma, Blanca, 2022, A new genus and new species of Ecuadorian Philopotamidae (Trichoptera), ZooKeys 1117, pp. 95-122 : 95

Chimarra (Chimarra) mashpi sp. nov.

Fig. 9

Type material.

Holotype. Male (pinned). Ecuador: Pichincha: Quebrada Laguna, in Mashpi Lodge, 00.16693°N, 078.87122°W, 1111 m a.s.l., 23.vii.2015, Rázuri, Morabowen, Hernández, UMSP000380186 (UMSP). Paratypes. Ecuador: Pichincha: Amagusa Reserve (private), Río Amagasu, 0.15508°N, 78.84330°W, 1160 m a.s.l., 17.i.2015, Holzenthal, Huisman, Ríos-Touma, 1 male (in alcohol) (MECN); Cotopaxi: Recinto Los Laureles ( Jardín de los Suenos), stream, 0.84165°S, 79.20051°W, 473 m a.s.l., Holzenthal, Ríos, Amigo, Huisman, 1 male (in alcohol) (MECN).

Diagnosis.

Chimarra mashpi is a distinctive species in the Chimarra (Chimarra) ortiziana group of Blahnik (1998), most closely resembling C. colmillo Blahnik & Holzenthal, 1992, especially in the spines of the endotheca, which has an array of short spines and two longer spines near the phallotremal opening (Fig. 9F ). As compared to C. colmillo , the apical part of the inferior appendage is shorter, wider, and strongly, angularly mesally flexed (Fig. 9C-E ). In the latter respect it somewhat resembles C. pollex Blahnik & Holzenthal, 1992, which also has the dorsal projection of the inferior appendage strongly flexed, but in C. pollex the dorsal lobe of the inferior appendage is shorter, narrower, and more dorsally directed, with the flexure forming a rounded notch. Tergum X of this new species is also diagnostic, with the lateral sensilla-bearing processes subtriangular and distinctly protruding (Fig. 9B ).

Description.

Adult. Forewing length 4.7 mm (n = 1). Color nearly uniformly brownish black (fuscous), except femora yellowish brown and head somewhat darker, with scattered whitish setae on vertex and anteromesal setal wart. Postocular parietal sclerite relatively short (less than half diameter of eye). Third segment of maxillary palp much longer than 2nd, subequal to 5th. Male protarsal claws enlarged, asymmetrical in size and shape, outer claw longer and twisted.

Male. Abdominal segment IX, in lateral view, with very pronounced sinuous extension of anteroventral margin and small apodemes from anterodorsal margin; posteroventral process moderately elongate, subacute apically. Tergum X membranous mesally, with sclerotized lateral lobes, each bearing pair of sensilla on subtriangular basolateral projection, apex of lobe with short, blunt projection. Preanal appendage short, rounded, knob-like. Inferior appendage, in lateral view, with relatively short and broad, apically rounded, dorsal process, ~ 2 × width of basal part of appendage, extending nearly straight on dorsal margin; as viewed ventrally or caudally, with dorsal process strongly and very angularly mesally flexed. Phallic apparatus with ventral margin of phallobase only weakly projecting; two phallic spines, subequal, moderately elongate; endotheca textured with small spines, also with sclerotic region with array of short spines and two more elongate spines. Phallotremal sclerite complex composed of elongate rod and ring structure and membranous structure with pair of associated wishbone-like sclerites apically.

Female. Unknown.

Etymology.

This new species is named for Mashpi Reserve, where this species was discovered, as a recognition of efforts to preserve the highly threatened Choco-Andean Tropical Forest.

Habitat notes.

The streams of the Amagusa and Mashpi Reserves at this elevation (1100-1200 m a.s.l.) have higher flows between February and April. These highly forested streams are usually step-pool channels, with average flows ranging between 0.049-0.056 m3/s. Conductivity is low, ranging from 35-88 µS /cm, oxygen is close to 100% saturation, and daytime water temperature ranges from 17-20 °C.

Figures

Figure 9. Chimarra (Chimarra) mashpi sp. nov. Male genitalia A segments IX, X, lateral B segments IX, X, dorsal C inferior appendages, oblique lateral D inferior appendage, ventral E inferior appendage, dorsal F phallus, lateral.