Corynoneura renata, Wiedenbrug & Lamas & Trivinho-Strixino, 2012

Wiedenbrug, Sofia, Lamas, Carlos E. & Trivinho-Strixino, Susana, 2012, 3574, Zootaxa 3574, pp. 1-61 : 40-41

Corynoneura renata sp. n.

( Figs 23–24)

Type material. Holotype pharate male, with pupal exuviae, BRAZIL, SP, Ubatuba , Sertão da Quina, Cachoeira da Renata upstream, 23˚30.789´S, 45˚14.442´W, 61 m a.s.l., 14.i.2008, S. Wiedenbrug . Paratypes: one pharate male with larva and pupal exuviae same data as holotype except 7.vii.2009 ; two pupal exuviae same date as holotype, except 2.v.2007.

Diagnostic characters. Male of C. renata differs from other species with phallapodeme attached in the caudal apex of the sternapodeme and s-seta on apex of hind tibia, by the antenna with 7 flagellomeres, aedeagal lobe with a large base and inferior volsella apical and large. The pupa of this species can be recognized by the conjunctive of tergite and sternite IV / V armed with long and thin spines and the anal lobes laterally straight, posteriorly rounded joined medially through a straight perpendicular margin. The larva has postmentum lenght/head width 1.16, first antennal segment shorter than postmentum length, second antennal segment shorter than the third, basal seta on posterior parapods split from the base and dark brown.

Etymology. The specific epithet refers to the waterfall where the type material was collected. The name is treated as a noun in apposition.

Description

Male (n = 2)

Thorax length 0.37–0.39 mm.

Color. Thorax brownish. Legs whitish.

Head. AR = 0.4–0.5. Antenna with 7 flagellomeres, apical flagellomere 130–145 µm. Flagellomeres, except first and last, with more than one row of setae each. Eyes pubescent.

Thorax. Antepronotal lobes dorsally tapering.

Wing. Not possible to measure.

Legs. Hind tibial scale 30–37 µm long, with one subapical s-seta.

Hypopygium ( Figs 23 A, B). Tergite IX with 4 setae. Laterosternite IX with 1 seta (not drawn). Superior volsella absent. Inferior volsella apical and large. Aedeagal lobe with a broad base and distally rounded. Transverse sternapodeme straight. Phallapodeme with posterior margin sclerotized, attached in the caudal apex of the sternapodeme. Gonostylus curved.

Metric and meristic features in Table 1.

Pupa (n = 4)

Total length 1.18–1.29 mm.

Color (exuviae). Cephalothorax light brown, abdomen transparent except brownish muscle markings, lateral margin and anal lobe.

Cephalothorax. Frontal apotome slightly granulated. Thorax suture smooth except scutal tubercle region rugose. All Dc-setae thin taeniate. Dc 1 displaced ventrally. Wing sheaths with one to two rows of pearls.

Abdomen ( Figs 24 A–D). Sternite and tergite I bare, tergite II with few thin shagreen points, tergites III–VII with very fine shagreen increasing in size posteriorly. Sternites II and III with scarse shagreen of elongate spinules, also on parasternites. Sternites IV–VII with fine shagreen with stronger posterior spines. Conjunctives TII/III–TVI/ VII and SIV/V-SVI/VII with spinules, longer on TIV/V and SIV/V. Segment I with 1, II with 3 L-setae and III–VIII with 4 long taeniate L-setae. Anal lobe laterally straight, posteriorly rounded ( Fig. 24 A). Anal lobe with fringe not complete, 3 taeniate macrosetae and inner setae taeniate.

Metric and meristic features in Table 3.

Larva (n = 1)

Head. Postmentum 125 µm long. Head capsule integument smooth. Mentum of observed specimen frayed. Possibly with two median teeth, first lateral teeth almost as large as median teeth ( Fig. 24 F). Antenna 233 µm long, segments two and three darker ( Fig. 24 E). First segment shorter than postmentum length, second antennal segment shorter than the third.

Abdomen. Ventral setae modified, longer and wider ( Fig. 24 G). Subbasal seta on posterior parapod dark, split from the base ( Fig. 24 H).

Metric and meristic features in Table 4.

Remarks. Larva of C. renata sp. n. was collected from the surface of stones, of a fast flowing small river in the Atlantic Forest in São Paulo State. Pupal exuviae of this species were also collected in Brazil in small rivers in the same biome at Rio Grande do Sul State ( Wiedenbrug 2000).