Atanatolica quechua, Henriques-Oliveira, A. L. & Santos, A. P. M., 2014

Henriques-Oliveira, A. L. & Santos, A. P. M., 2014, Two new species of Atanatolica Mosely 1936 (Trichoptera: Leptoceridae) from Peru and Northeastern Brazil, Zootaxa 3869 (5), pp. 537-547 : 543

Atanatolica quechua sp. nov.

( Figs. 4–5 )

Remarks. This new species belongs to the A. dominicana Group and has morphological similarities with A. botosaneanui Flint 1981 , A. manabi Holzenthal 1988 , and A. zongo Holzenthal 1988 , particularly the long and digitate processes of tergum X. However, males of A. quechua sp. nov. can be easily distinguished by the longer and more slender preanal appendages; the distally broader apicodorsal portion of each inferior appendage; and the slightly capitate apicolateral processes of tergum X. Females can be diagnosed by tergum IX sclerotized, tergum X short and with a small digitate process above the lamellae. Larvae of this new species can be distinguished from described larvae by tibiae each with short spine-like setae on the inner margin and the metasternum with a row of long, dark setae. The larval case, almost straight, also helps to distinguishe this species.

Adult male: Body length 5.5 ± 0.5 mm; length of each forewing 6.5 ± 0.5 mm; length of each hind wing 4.5 ± 0.5 mm (n = 5). General color brown (in alcohol). Head with frontal setal wart oval, pale brown with brown and white setae; posterior setal warts pale brown with brown and white setae. Antennae, maxillary and labial palps pale brown with brown setae. Thorax brown with a dorsomesal area pale brown. Forewings with forks I and V present, fork I petiolate. Hind wings with forks III and V present; crossvein rs absent ( Fig. 4 A). Tibial spur formula 0,2,2.

Genitalia: Segment IX annular, short with anterolateral margins rounded and slightly sinuate ( Fig. 4 B). Preanal appendages longer than tergum X, slender, finger-like, and setose ( Figs 4 B, 4D). Tergum X basal portion membranous, with 2 pairs of sclerotized apical processes; apicomesal processes long and digitate; apicolateral processes shorter than apicomesal processes, each with capitate apex slightly upturned in lateral view ( Figs. 4 C, 4D). Inferior appendages each with basal portion of first article broad and setose posterior margin slightly concave mesally in ventral view; apicodorsal portion finger-like, distal area broader and covered with short, stout, spine-like setae on internal margin; second article very short, thumb-nail shaped ( Fig. 4 C). Phallic apparatus simple; phallobase tubular; phallotremal sclerite small and rounded ( Figs. 4 E, 4F).

Adult female: Body length 5.5 ± 0.5; length of each forewing 6.5 ± 0.5 mm; length of each hind wing 5.0 ± 0.5 mm (n = 4). Forewings with forks I, III, and V present, fork I petiolate. Other features of thorax as in male.

Genitalia: Tergum IX sclerotized, with rounded setose area laterally; sternum IX membranous, plicate. Tergum X short, produced downward in lateral view, with small digitate process above lamellae; in ventral view cleft mesally ( Fig. 4 H). Lamellae of segment X short and slightly truncate in lateral view, heavily setose ( Fig. 4 G). Vaginal sclerite slender and slightly sclerotized.

Larva: Body length about 8,0 ± 1.0 mm (n = 10). Head, body sclerites and legs brown ( Figs. 5 B, 5C). Head subquadrangular, covered with numerous short setae ( Fig. 5 D). Pronotum sclerotized, with mesal ecdysial line covered by short setae. Metanotum with large dorsomesal sclerite (fused sa 1 and sa 2) and pair of small lateral sclerites (sa 3), both with setae on anterior portion. Metasternum with row of setal areas bearing long dark setae ( Fig. 5 F). Tibiae each with short spine-like setae on inner margins. Middle and hind tibiae with fine, short setae on posterior surfaces. Tarsal claws simple, each with basal seta. Abdominal segment I with oval dorsal hump sclerite, pair of dorsolateral setae, and pair of dorsolateral sclerites; lateral hump sclerite on each side large with central seta ( Fig. 5 F). Gills simple, laterally on segments I to III. Anal prolegs short, bearing long setae; proleg claws each with short dorsal accessory hook. Lateral lines apparently absent. Segment VIII with row of lateral spines on each side.

Larval Case: Length 12 ± 2.0 mm (n = 10). Made of sand grains, anterior area with grains slightly larger, golden brown with some scattered black grains; case long, narrow, tapering to posterior area; almost straight ( Fig. 5 A).

Pupa: Unknown.

Holotype male (in alcohol): PERU: Cuzco: Puente Inambari, 13º10’53”S, 70º23’06”W, el. 365 m, 19.viii.2012, light trap, APM Santos & DM Takiya leg. ( MUSM).

Paratypes: PERU: Cuzco: Same data as holotype, 3 males, 1 female and 15 larvae ( MUSM), 5 males ( DZRJ), 2 female ( DZRJ), 15 larvae ( DZRJ), 1 male and 1 female ( INPA); same data except 6 km W Mazuko, Puente La Cigarra, tributary to Río Araza, 13°08’27”S, 70°25’14”W, el. 353 m, 01.ix.2012, 6 larvae and 1 pharate male ( DZRJ), 4 larvae ( MUSM).

Etymology. This new species is named in honor of the Quechua , indigenous people of the Andes who speak a Quechuan language.

Distribution and biology. Peru (Cuzco Province, Fig. 6 ). Larvae and pupae of Atanatolica species can exhibit a semi-terrestrial habit, being in the splash zone, out of the main flow of a stream ( Flint 1968, Holzenthal 1988). In a similar way, final instar larvae of A. quechua sp. nov. were found on the vertical faces of rocks above the water surface, near the torrential flow. As mentioned for other Atanatolica species ( Holzenthal 1988), larvae of this new species produce a silken thread attached to rock surfaces to aid the larvae in clinging to the substrate. These larvae were collected in a second order stream that is tributary to a large river (Río Araza). Adults were collected with light traps near Río Araza, but larvae were not found in this river; probably they were in a small neighboring tributary, with adults flying to the larger river. This species occurs in areas of typical Amazon Forest.

Figures

FIGURE 4. Atanatolica quechua, new species, male (A – F) and female (G – H). 4 A, male right fore- and hindwings, dorsal; 4 B – 4 F, male genitalia; 4 B, left lateral; 4 C, dorsal; 4 D, ventral; 4 E, phallic apparatus, left lateral; 4 F, phallic apparatus, ventral; 4 G – 4 H, female genitalia: 4 G, left lateral; 4 H, ventral.

FIGURE 5. Atanatolica quechua, new species: larva. 5 A, larva and case, left lateral; 5 B, larva, left lateral; 5 C, head, thorax and abdominal segment I, dorsal; 5 D, head, dorsal; 5 E, legs, left lateral; 5 F, abdominal segment I, left lateral.

FIGURE 6. Map of distribution of Atanatolica nordestina and A. quechua.