Corynoneura salviniatilis Wiedenbrug & Lamas & Trivinho-Strixino 2012, sp. n.
Creators: name: Wiedenbrug, Sofia
name: Lamas, Carlos E.
name: Trivinho-Strixino, Susana
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Corynoneura
Corynoneura salviniatilis

description: Corynoneura salviniatilis sp. n.   
(Figs 25–27)  
 Type material. Holotype male with pupal and larval exuviae, BRAZIL, SP, Luiz Antônio, Estação Ecológica do Jataí, Lagoa do Diogo, 17.iii.2011, S. Wiedenbrug. Paratypes: allotype female with pupal and larval exuviae, Estação Ecológica do Jataí, Represa do Beija Flor, 24.ix.2011, S. Wiedenbrug.   
Additional material. Two males, BRAZIL, MT, Chapada dos Guimarães, Malaise n° 16, S 15°24´33.0´´, W55°49´54.9´´, C. Lamas e equipe, 19.ix–15.x.2011 and 13.x–08.xi.2011.  
 Diagnostic characters. Male of C. salviniatilis sp. n. is very similar to C. diogo sp. n., but the apex of the antenna bears about 10 sensilla chaetica, the gonocoxite is laterally rounded and the aedeagal lobe is small and rectangular. The female is characterized by the antennal apex rounded, genitalia with two Sca about 30 µm long, copulatory bursa semi-circled, dorsal with membranous oral extension, not median invaginated and laterosternite IX without setae. Pupae with abdominal shagreen composed of very fine shagreen, points of the sternites are slightly elongated; anal lobe rounded, both together wider than longer. The larval head integument smooth, first antennal segment shorter than postmentum length, second antennal segment subequal or larger than the third, mentum with two median teeth, first pair of lateral teeth larger than the second.   
 Etymology. Named after the aquatic plant where the larvae were collected, Salvinia sp. and the Latin suffix— atilis that means place where it occurs.   
 Description   
 Male (n = 1)   
Total length 0.83 mm. Wing length 0.58 mm.  
Color. Thorax brownish. Abdominal tergites I–IV whitish, other tergites and genitalia brownish. Legs whitish. Head. AR = 0.32. Antenna with 9 flagellomeres, apical flagellomere 140 µm. Flagellomeres, except first and last, with more than one row of setae each. Antennal apex with 10 sensilla (Fig. 25 A). Eyes pubescent.  
Thorax. Antepronotal lobes dorsally tapering.  
Wing. Clavus/wing length 0.22. Anal lobe absent (Fig. 25 C).  
Legs. Hind tibial scale 27 µm long, with one s-seta (Fig. 25 B).  
Hypopygium (Figs 25 D–E). Tergite IX with 2 setae. Laterosternite IX without setae. Superior and inferior volsella absent. Gonocoxite laterally rounded, posterior region between inner and outer margin with sclerotized longitudinal ridge. Aedeagal lobe small and rectangular. Lateral and transverse sternapodeme straight. Phallapodeme elongated, with posterior margin sclerotized, attached in the caudal apex of the sternapodeme.  
Metric and meristic features in Table 1.  
 Female (n = 1)   
Wing length 0.56 mm.  
Color. Thorax brownish. Abdominal tergites II–IX brownish. Legs whitish.  
Head. AR = 0.37. Antenna with 5 flagellomeres, apical flagellomere 40 µm long. Flagellomeres with more than one row of setae each. Antennal apex with about 15 sensilla (Fig. 26 A). Eyes pubescent.  
Thorax. Antepronotal lobes dorsally tapering.  
Wing. Clavus/wing length 0.40. Anal lobe absent.  
Legs. Hind tibial scale 30 µm long, with one small s-seta.  
Genitalia (Figs 26 B–C). Tergite IX with 2 setae. Laterosternite IX without setae. Two seminal capsules 30 µm long, both spermathecal ducts with a loop, ducts join together shortly before seminal eminence, which has sclerotized outer borders. Membrane well sclerotized. Apodeme lobe with median border sclerotized. Coxosternapodeme curved, with one end at roof of copulatory bursa, last with sclerotized dorsal-oral extension, oral-median invaginated. Labia difficult to define. Gonocoxapodeme straight, gonapophyses median pointed. Cercus 20 µm long.  
Metric and meristic features in Table 2.  
 Pupa (n = 2)   
Total length 1.35 mm.  
Color (exuviae). Cephalothorax and abdomen almost transparent.  
 Cephalothorax. Frontal apotome almost smooth. Thorax suture smooth except scutal tubercle region rugose. Dc 3 taeniate much longer than the others, longer than 100µm. Dc 1 displaced ventrally. Wing sheaths with two rows of pearls.   
Abdomen (Figs 27 A–D). Sternite I and tergites I and II bare, tergites III–IX with very fine shagreen of short points. Sternites II–VIII with very fine shagreen of slightly elongated points. Conjunctives TIII/IV–TV/VI and SIII/IV–SVII/VIII with spinules. Segment I with 1, II with 3 L-setae and IV–VIII with 4 long taeniate L-setae. Anal lobe rounded (Fig. 27 B). Anal lobe with fringe almost complete, 3 taeniate macrosetae and inner setae taeniate. Metric and meristic features in Table 3.  
 Larva (n = 2)   
Head. Postmentum 185–188 µm long. Head capsule integument of the exuviae ventral slightly rugose. Mentum with two median teeth, first lateral teeth larger than the second (Fig. 27 E). Antenna 240–248 µm long, segments two and three darker. First segment shorter than postmentum length (Fig. 27 F).  
Abdomen. Ventral setae modified, wider apically split. Sub-basal seta on posterior parapod split from the base with one spine longer (Fig. 27 G).  
Metric and meristic features in Table 4.  
 Remarks. This species was collected from Salvinia sp. (Salviniaceae), as well as with artificial substrate, left between the aquatic macrophytes in marginal lakes of the Mogi-Guaçú River in São Paulo State, Brazil. See C. diogo sp. n.
description: Published as part of Wiedenbrug, Sofia, Lamas, Carlos E. & Trivinho-Strixino, Susana, 2012, 3574, pp. 1-61 in Zootaxa 3574 on pages 42-46