Micronecta virgata Hale, 1922

Tinerella, Paul P., 2013, <strong> Taxonomic revision and systematics of continental Australian pygmy water boatmen (Hemiptera: Heteroptera: Corixoidea: Micronectidae) </ strong>, Zootaxa 3623 (1), pp. 1-121 : 91-96

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https://doi.org/ 10.11646/zootaxa.3623.1.1

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Micronecta virgata Hale, 1922


Micronecta virgata Hale, 1922 View in CoL

( Figs. 49–52 View FIGURE 49 View FIGURE 50 View FIGURE 51 View FIGURE 52 )

Micronecta virgata Hale, 1922: 327 View in CoL .

Micronecta virgata: Lundblad, 1933: 76 View in CoL . [list]

Micronecta virgata: Wróblewski, 1962b: 320 View in CoL . [redescription]

Micronecta virgata: Chen, 1965: 164 View in CoL . [faunistics]

Micronecta virgata: Wróblewski, 1970: 691 View in CoL . [additional description]

Micronecta virgata: Cassis and Gross, 1995: 69 View in CoL . [catalog]

Micronecta virgata: Nieser and Chen 1999: 82 View in CoL . [additional diagnosis]

Micronecta virgata: Andersen and Weir, 2004: 250 View in CoL , 335. [key; list]

Micronecta virgata: Tinerella and Polhemus, 2005: 187 View in CoL . [key; faunistics]

Micronecta virgata: Chen et al., 2005: 420 View in CoL . [list]

Micronecta virgata: Tinerella, 2006a: 700 View in CoL . [phylogeny discussion]

Micronecta virgata: Tinerella, 2008: 53 View in CoL View Cited Treatment . [redescription, phylogeny]

Diagnosis: Readily distinguished by size, the interocular space greater than width of eye, and hemelytral patterning ( Figs. 49c–e View FIGURE 49 ). Similar in general habitus to Micronecta carbonaria , however, the species is distinguished by the four distinct, longitudinal hemelytral stripes and by a combination of the characters given below.

Size: ( Table 16). Macropterous form: 2.89–3.50. The given metrics expand the previous known size for the species. Brachypterous form unknown.

Derivation of specific epithet: From the Latin virgata , meaning striped, probably referring to the blackstriped hemelytra of this species.

Notes on type material: Type series deposited in SAMA. Holotype ( Figs. 49a–c View FIGURE 49 ): SAMA I.15190, ♂, “Townsville, G. F. Hill, N. Q.”, mounted on point card. Label bearing “TYPE”, as well as a handwritten label bearing “ Micronecta virgata Hale , Queensland ”; “TYPE” handwritten in red on right side of label. “I.15190” handwritten at top-right corner of label. Paratypes: (1♂, 1♀), SAMA. (♂): mounted on point card; “ Cairns Dist., A. M. Lea. ” Pin with pink “Co-Type” label. Large handwritten label printed “ paratype ” at right edge. Handwritten: “ Micronecta virgata Hale. ” (♀): mounted on point card; printed: “ Cairns Dist. , A. M. Lea. ” Pin with pink “Co- Type” label. Determination label bearing: Micronecta virgata Hale , det. L. C. Chen, 1962. All type material listed here was examined .

Description: Based on macropterous form. Measurements. Length: male 2.94–3.36; female 2.89–3.50; Width: male 1.51–1.61; female 1.66–1.75; Width of head: male 1.15–1.27; female 1.19–1.33; Synthlipsis: male 0.49–0.57; female 0.55–0.65; Width of eye: male 0.29–0.38; female 0.29–0.39; Width of pronotum: male 1.08–1.22; female 1.14–1.27; Length of pronotum: male 0.36–0.40; female 0.36–0.40.

Color: Ground color brown to reddish-brown ( Figs. 49c–e View FIGURE 49 ). Head same color, eyes greyish-brown. Vertex and frons pale brown, clypeus darker brown, appearing mottled. Labium darker brown. Genal area lighter brown, same general color as head. Antennae pale. Pronotum dark brown, margins lighter, faint, narrowed pale band present along apical margin. Scutellum pruinose medio-laterally. Clavus with basal pale, diagonal area, apical portion same general ground color as corium and membrane. Corium with four darker contiguous, longitudinal bands present, though sometimes faint. Prenodal embolar area entirely pruinose. Postnodal embolar area very short, pruinose. Left membrane hyaline in both sexes, paler laterally, with inner portion embrowned, medio-apical portion with narrowed, darkened band present. Venter light brown, natatorial setae darker brown.

Structural characteristics: Ratio of body length/width: males 1.96; females 1.91. Head slightly wider than pronotum, interocular space greater than width of eye, synthlipsis 1.7 times as wide as posterior width of eye. Ocular index: males 1.56; females 1.74. General facies of head (vertex, frons, and labium) proportionate. Antennae densely pilose, segments one and two very short, segment three longer, club-shaped. Pronotum robust, convexly rounded and short, nearly four and one half times as wide as long (W/L: males 1.59/0.37; females 1.70/0.38). Prothoracic lobe broad, anterior margin quadrate, posterior margin broadly rounded ( Fig. 50a View FIGURE 50 ). Hemelytra with short, transverse microsculpturing. Short setae distributed mainly over corium with setation of the clavus restricted to apical portions. Prenodal embolar area well-developed, nodal furrow and postnodal embolar area similar to Micronecta carbonaria Horváth. Metathoracic wings well-developed, reaching to apices of hemelytra. Lateral spines on abdominal segments IV–VIII: IV: one stout, short spine, one long, thin spine; V: two short, stout spines, one long, stout spine, one long, thin spine; VI: two short, stout spines, one long, stout spine; VII: two short, stout spines, one long, stout spine; VIII: four stout, short spines, three thin, long spines. Metaxyphus of both sexes short, triangular, acutely pointed ( Fig. 50b View FIGURE 50 ).

Male foreleg ( Fig. 50c View FIGURE 50 .): femur with two short, stout spines in basal third near ventral surface, a cluster of four to six stout spines basally, and two spines, one stout, long spine and one shorter, thin spine, placed medially on dorsal surface. Tibia with one large latero-ventral spine in anterior portion and one large spine dorso-apically. Pala with four to five larger setae dorsally; palmar area with nine setae in dorsal row and 13–15 in ventral row, ventral row setae more pronounced than dorsal row. Apex of pala with single thickened, claw-like seta. Palar claw ( Fig. 50d View FIGURE 50 ) tapered sharply proximad, widening with upper surface broadly rounded, lower margin nearly straight. Female foreleg with same general setal arrangement as male. Mesotarsal claws long, nearly three-fourths the length of mesotarsus.

Lateral lobes of abdominal tergum IV short, rounded. Right lobe with 16 long setae along margin, left lobe with 13 setae evenly spaced along margin. Prestrigilar flap of tergal segment V short and wide, with margins rounded ( Fig. 50e View FIGURE 50 ). Strigil very long, rectangular in outline, width variable though never wider than long. Median lobe of sternite VII ( Fig. 51a View FIGURE 51 ) short, length nearly equal to width, apex acutely pointed, setal lengths variable and confined to extreme basal portion. Free lobe of tergite VIII ( Fig. 51b View FIGURE 51 ) broad, with well-produced rounded inner angle, setae restricted to upper inner angle and apex, numbering 11 to 16. Pars stridens processus cleaner ridges of tergite VIII appearing as a fine-ridged mat, with upper narrow series and broad lower widened series. Left paramere ( Figs. 51c–f View FIGURE 51 ) markedly shorter than right, shaft equally broad along length with sharp, recurved distal hook. Base short, broadly rounded. Right paramere ( Figs. 51c–g View FIGURE 51 ) with long medially constricted shaft, apex broad and sharply pointed. Base broad ( Fig. 51h View FIGURE 51 ) with 28–36 plectral ribs spanning width. Aedeagus, as in Figures 51c–g View FIGURE 51 .

Distribution and Habitat: ( Fig. 52 View FIGURE 52 ). A widespread species, known from Sulawesi, Timor, Australia, New Guinea, and the Solomon Islands ( Tinerella 2006b). In Australia, the species is distributed in the north from Queensland and Northern Territory, westward to Western Australia. The species is newly recorded here from Northern Territory. No Queensland records (except the type series) were examined in this writing. Little habitat data are available for the species. Most specimens examined in this writing were taken at lights.

Discussion: Micronecta virgata is clearly allied with M. carbonaria and other species of the M. annae species group on the basis of abdominal morphology and the male genitalia. Variation within the species was discussed by Tinerella (2006b, 2008).

Specimens examined: AUSTRALIA: Northern Territory: Darwin. swamp. CL-903. 10-XII-1977. J. T. Polhemus. (2♀♀). [ JTPC] ; Northern Territory: Daly River . CL-906. 11-XII-1977. J. T. Polhemus. (3♂, 2♀♀). [ JTPC] ; Northern Territory: S. Alligator River area , 35 km W Jabiru. blacklight. 9-IV-1980. G. F. Hevel and J. A. Fortin. (39♂, 117♀♀). [ USNM] ; Western Australia: GPS Karajini N. P., 17 km W of Ranger Station. 22.35S; 118.17E. at light, open forest. 20-IV-2003. T. A. Weir. (6♂, 16♀♀). [ ANIC] GoogleMaps ; Western Australia: Pilbara, Paradise Pool. PSW034. 3-IX-2003. J. M. McRae. (18♂, 23♀♀). [ CALM] .


Colorado Entomological Museum (formerly John T. Polhemus collection)


Smithsonian Institution, National Museum of Natural History


Australian National Insect Collection














Micronecta virgata Hale, 1922

Tinerella, Paul P. 2013

Micronecta virgata: Tinerella, 2008: 53

Tinerella, P. P. 2008: 53

Micronecta virgata:

Tinerella, P. P. 2006: 700

Micronecta virgata:

Tinerella, P. P. & Polhemus, J. T. 2005: 187

Micronecta virgata:

Chen, P. P. & Nieser, N. & Zettel, H. 2005: 420

Micronecta virgata:

Andersen, N. M. & Weir, T. A. 2004: 250

Micronecta virgata:

Nieser, N. & Chen, P. P. 1999: 82

Micronecta virgata:

Cassis, G. & Gross, G. F. 1995: 69

Micronecta virgata: Wróblewski, 1970: 691

Wroblewski, A. 1970: 691

Micronecta virgata:

Chen, L. C. 1965: 164

Micronecta virgata: Wróblewski, 1962b: 320

Wroblewski, A. 1962: 320

Micronecta virgata:

Lundblad, O. 1933: 76

Micronecta virgata

Hale, H. M. 1922: 327
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