Metanigrus guttatus Lv & Chen, 2021
publication ID |
https://dx.doi.org/10.3897/zookeys.1024.62226 |
publication LSID |
lsid:zoobank.org:pub:DF1FE763-851D-4C8F-8986-6D75FEBA5CE9 |
persistent identifier |
https://treatment.plazi.org/id/282F525A-00BB-4C2C-AD1B-61726291F562 |
taxon LSID |
lsid:zoobank.org:act:282F525A-00BB-4C2C-AD1B-61726291F562 |
treatment provided by |
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scientific name |
Metanigrus guttatus Lv & Chen |
status |
sp. nov. |
Metanigrus guttatus Lv & Chen sp. nov. Figs 3 View Figures 1–8 , 4 View Figures 1–8 , 20-30 View Figures 20–30
Measurements.
Total length: male 3.96-4.31 mm (N = 13), female 4.44-4.72 mm (N = 8).
Diagnosis.
The salient features of the new species include: the distal part of tegmina (Fig. 22 View Figures 20–30 ) with a large black patch; dorsolateral part of anal tube (Figs 24 View Figures 20–30 , 27 View Figures 20–30 ) with a stout finger-like process, a protrusion on the basolateral finger-like process; gonostyli (Figs 24 View Figures 20–30 , 27 View Figures 20–30 , 29 View Figures 20–30 ) slender, inner process very narrow, apex of outer process nearly fan-shaped in lateral view.
Coloration.
General color yellowish white (Figs 3 View Figures 1–8 , 4 View Figures 1–8 ). Frons whitish yellow. Clypeus black-brown. Vertex and pronotum white. Mesonotum brown. Eyes black. Legs yellowish brown. Tegmina semitransparent, with black patch near end. Wings hyaline. Abdomen brown.
Head and thorax.
Head (Figs 3 View Figures 1–8 , 20 View Figures 20–30 ) significantly narrower than pronotum, without median carina. Vertex shorter in middle line than wide at base (1: 1.77), with two posterolateral areolets at base not meeting medially. Frons (Fig. 21 View Figures 20–30 ) subrectangular, without median carina, longer in middle line than wide at widest portion (about 1.67: 1), lateral carinae with a dense row of sensory pits along outer margin. Postclypeus (Fig. 21 View Figures 20–30 ) with distinct median and lateral carinae. Frontoclypeal suture nearly straight. Rostrum elongate, in repose well surpassing hind-coxae. Pronotum (Fig. 20 View Figures 20–30 ) wider than maximum width of head (including eyes) (1.71: 1), with median carina and sinuate lateral carinae. Mesonotum (Fig. 20 View Figures 20–30 ) about 4.57 times longer than pronotum in midline, with distinct median carina. Tegmina (Fig. 22 View Figures 20–30 ) slender, longer than maximal width (2.59: 1), almost as wide at postnodal as prenodal area, veins ScP + R + MP with several sensory pits, MP 3 two branched; five postnodal closed cells with C1 smaller than C2, C5 placed next to C3, C4 distally displaced after the nodal line, im, r-m and anterior two-thirds of margin with white areas. Hind wing (Fig. 23 View Figures 20–30 ) with lateral margin notched at CuA1, CuP, and A2, more strongly at A1; A2 not reaching posterior margin. Metatibiotarsal formula: (3+5)-6-5.
Male genitalia.
Pygofer (Figs 24 View Figures 20–30 , 25 View Figures 20–30 , 27 View Figures 20–30 , 28 View Figures 20–30 ) symmetrical, gradually narrowed towards apex, with sinuate anterior and posterior margins. Pygopher with internal sulcus, with slightly curved lateral margins in ventral view. Anal tube (Figs 24 View Figures 20–30 , 27 View Figures 20–30 ) in lateral view, hand-shaped, anal style slender, lateral lobes distally shorter than anal style, dorsolateral part with a stout finger-like process, a protrusion on the basolateral finger-like process. Aedeagus (Figs 24 View Figures 20–30 , 26 View Figures 20–30 , 27 View Figures 20–30 , 30 View Figures 20–30 ) acuminate apically, with tubular periandrium, lateral lobes swelling on both sides, surface beset with scale-like productions, ventral lobe slender with acute apex, dorsal lobes with an acute and a nearly rectangular process; in ventral view, base wider. Gonostyli (Figs 24 View Figures 20–30 , 25 View Figures 20–30 , 27-29 View Figures 20–30 ) slender, divided into two parts, inner process very narrow, curved apically, tapering into a process; in lateral view, outer process convex, apex nearly fan-shaped, inner margin with long setae; in ventral view, divergent, top of outer gonostyli with a pointed needle-like structure on the inner side.
Type material.
Holotype: ♂, China: Guizhou, Zhijin county (26°35'N, 105°53'E), 18 July 2020, Sha-Sha Lv; Paratypes GoogleMaps : 12♂♂, Guizhou, Zhijin county , 18 July 2020, Sha-Sha Lv, Feng-E Li, Xiao-Ya Wang and Nian Gong ; 8♀♀, Guizhou, Zhijin county , 18 July 2020, Sha-Sha Lv, Feng-E Li and Nian Gong .
Etymology.
The species name is derived from the Latin adjective " Metanigrus guttatus ", referring to the tegmina with a patch.
Remarks.
This species is similar to Metanigrus chromus but differs from the latter in: (1) distal part of tegmina with a large black patch (distal part of tegmina without a large black patch in M. chromus ); (2) frons without two brownish-black patches on both sides (frons with two brownish-black patches on both sides in M. chromus ); (3) dorsolateral part of anal tube with a finger-like process (dorsolateral part of anal tube without a finger-like process in M. chromus ).
Distribution.
China (Guizhou) (Fig. 61 View Figure 61 ).
R |
Departamento de Geologia, Universidad de Chile |
MP |
Mohonk Preserve, Inc. |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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