Alisotrichia froehlichi, Alves & Takiya & Santos, 2023

Alves, André Almeida, Takiya, Daniela Maeda & Santos, Allan Paulo Moreira, 2023, Five new species of Alisotrichia Flint, 1964 (Trichoptera: Hydroptilidae: Leucotrichiinae) from Northeastern Brazil, Revista Brasileira de Entomologia (e 20230073) 67, pp. 1-11 : 2-4

publication ID	https://doi.org/ 10.1590/1806-9665-RBENT-2023-0073
DOI	https://doi.org/10.5281/zenodo.13196050
persistent identifier	https://treatment.plazi.org/id/461F87FC-1D7D-1942-FFEE-EA11FD904984
treatment provided by	Felipe
scientific name	Alisotrichia froehlichi
status	sp. nov.

Treatment

Alisotrichia froehlichi sp. nov.

urn:lsid:zoobank.org:act:09D7DDEE-5BE5-44D8-B77A-84FC3ED53DF7

( Figs. 2 View Figure 2 , 3 View Figure 3 A-3E)

Description. Adult male.Forewing length 1.70–1.98 mm (mean = 1.84 mm, SD = 0.10, n = 11). General color, in ethanol, brown ( Fig. 2 View Figure 2 ). Antennae 18-articulated; scape enlarged, semicircular in anterior view ( Fig. 3E View Figure 3 ); pedicel slightly globose, chalice-like, longer than the next two articles combined ( Fig. 3E View Figure 3 ); flagellomeres short, covered by scale-like setae, apical article tapering ( Fig. 3E View Figure 3 ). Ocelli 2. Maxillary palpi 5-articulated, 4th and 5th palpomeres thin, 5th palpomere about 1.5x longer than 4th. Labial palpi 3-articulated. Mesoscutellum with transverse suture. Metascutellum approximately elliptical. Tibial spurs formula 0,2,4, each pair of meso- and metatibial spurs with one spur about twice as long as the other. Fore- and hind wings with long dark brown setae ( Fig. 2 View Figure 2 ). Abdominal segment VII with ventromesal process, bifurcate in lateral view, with dorsal branch longer than ventral ( Fig. 3C View Figure 3 ).

Male genitalia. Segment VIII with a pair of dorsolateral processes, posterad directed, each bearing a very long, spine-like seta, extending beyond segment apex ( Figs. 3A, 3C View Figure 3 ); in lateral view, with rounded apex ( Fig.3C View Figure 3 ); in ventral view, posterior margin with a very deep mesal Y-shaped incision, with a pair of short, acute processes directed inwards, and a pair of shallow lateral V-shaped incisions ( Fig. 3B View Figure 3 ). Segment IX fused with segment X, reduced ventrally; with a pair of slender, lateral elongate processes, slightly curved inwards in dorsal view ( Fig. 3A View Figure 3 ); anterolateral margins with a pair of slender apodemes reaching segment VII internally ( Figs. 3 View Figure 3 A-3C). Segment X long, membranous; with lateral margins slightly arched in dorsal view ( Fig. 3A View Figure 3 ); dorsally with a pair of slender sclerites, each one thinner at midlength, tapering to a rounded apex ( Fig. 3A View Figure 3 ). Subgenital plate, in ventral view, long, extending beyond half length of segment VIII; with anterior portion projecting into a pair of rods; posterior margin subquadrate, with a subapical circular open area ( Fig.3B View Figure 3 ). Inferior appendages absent.Phallus tubular, constricted mesally; superior portion with basal and median third shovel-like, slightly sclerotized; apical third membranous and apically rounded ( Fig. 3D View Figure 3 ); ejaculatory duct protruding subapically, in an inverted funnel-like portion ( Fig.3D View Figure 3 ).

Taxonomic notes. This new species is placed in the orophila species group by having a pair of dorsolateral processes on segment VIII. Alisotrichia froehlichi sp. nov. is most similar to A. kanukua Harris & Flint, 2002 and A. dilatata sp. nov. because they share the segment X, in dorsal view, with arched lateral margins and apex slightly concave, and segment VIII, in lateral view, with rounded apex, and in ventral view, with a mesal Y-shaped incision and paired lateral V-shaped incisions. However, A. froehlichi sp. nov. can be distinguished by the presence of the ventromesal process on abdominal segment VII, and by the posterior margin of the segment VIII, in ventral view, with a pair of short acute processes, directed inwards, arising at the edge of the mesal incision ( Fig. 3B View Figure 3 ). In addition, the posterior margin of segment VIII, in ventral view, also bears shallow lateral incisions, but in this new species they are shallower than in others ( Fig. 3B View Figure 3 ). The general aspect of the phallus is also diagnostic, with basal and sclerotized portion resembling a shovel and apical region mostly membranous ( Fig. 3D View Figure 3 ).

Etymology: This species is named in honor of Dr. Claudio G. Froehlich, in reference to his important contributions to the knowledge of Neotropical aquatic insects.

Distribution: Brazil (Sergipe). Atlantic Forest biome.

Material examined. Holotype male: BRAZIL: Sergipe, Itabaiana, Parque Nacional da Serra de Itabaiana , Riacho dos Negros, 10°44’51”S, 37°20’24”S, 202 m, 17.vi.2014, Pennsylvania trap, D.M. Takiya, A.P.M. Santos, W.R.M. Souza & A.C. Domahovski leg. ( DZRJ).

Paratypes: same data as holotype, 2 males ( DZRJ) , 2 males ( MNRJ) , 2 males ( INPA) , 2 males ( UFBA) ; same data as holotype, but Parque Nacional da Serra de Itabaiana , Riacho Água Fria, 10°45’17”S, 37°20’32.4”W, 196 m, 17–19.vi.2014, D.M. Takiya, A.P.M.Santos, W.R.M. Souza & A.C. Domahovski leg., 2 males ( DZRJ) GoogleMaps .