Corresponding author: Mei-Cai Wei (
Academic editor: Marko Prous
Li Z-J, Wang H-N, Liu M-M, Wei M-C (2022) A new species of
The village Dayuan, the type locality of the new species described below, is located in the town of Dayuan in Jinyun County of Lishui City, Zhejiang Province in East China. Five females were collected there and identified as new to science. A diagnosis and description of the new species as well as a revised key to the Chinese species of
Specimens studied in this work were collected near the village Dayuan by a light trap. The specimens were examined with a Motic-SMZ-171 stereomicroscope. Images of adults were taken with a Nikon D700 digital camera and a Leica Z16APO miscroscope. The genitalia were examined with a Motic BA410E microscope and photographed with a Motic Moticam Pro 285A. Images were focus-stacked using Helicon Focus (HeliconSoft, Kharkiv, Ukraine) and further processed with Adobe Photoshop CS 11.0. The terminology of genitalia follows
The holotype and a paratype are deposited in the Asian Sawfly Museum, Nanchang, China (
Abbreviations used in the text and illustrations are as follows:
See
China, Zhejiang, Lishui City, Jinyun County, Dayuan Town, Dayuan Village.
The genus
Holotype, female. Body length 10–10.5 mm, wingspan 19–20 mm (Figs
In one specimen, the mesoscutellum has a uniformly white band with two lateral yellowish white maculae connected.
Unknown.
China (Zhejiang).
The specific epithet “
1 | Inner spur of hind tibia scale like |
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– | Inner spur of hind tibia simple |
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2 | Annuli 2 and 3 divergent downwards (Fig. |
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– | Annuli 2 and 3 parallel (Figs |
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3 | Serrulae 3–5 broader than their respective ctenidia (Fig. |
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– | Serrulae 3–5 equal in breadth to their respective ctenidia (Fig. |
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4 | Wings strongly smoky; body entirely black in both sexes without pale markings; basal two ctenidia inclined apically, second annulus more than 2× as broad as first annulus, lamnium triangular, widest near second annulus and strongly tapering toward apex (Fig. |
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– | Wings hyaline; body at least partly pale; second ctenidium usually inclined basally, if perpendicular then lamnium not enlarged at middle; second annulus about as long as and at most slightly longer than first annulus |
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5 | Head largely black at least between ocellar area and toruli; lancet weakly broadened at middle, and weakly narrowed toward both ends, ventral margin of lamnium straight or nearly so; distance between lower end of second annulus and apex of lancet 1.6–2.5 times the height of second annulus as measure perpendicular to the longitudinal axis of the lancet |
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– | Head pale with a small black macula at most on ocellar area; lancet strongly narrowed from 2nd annulus both to base and apex, ventral margin of lamnium distinctly concave, distance between lower end of second annulus and apex of lancet 1.3–1.6× the height of second annulus as measure perpendicular to the longitudinal axis of the lancet |
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6 | First ctenidium strongly curved and strongly divergent downwards from second ctenidium |
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– | First ctenidium straight or slightly curved and subparallel or even convergent downwards towards second ctenidium |
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7 |
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– | * |
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8 | Black macula on frons laterally not touching eye; first ctenidium weakly apically curved at middle; distance between lower end of second annulus and apex of lancet 2× the height of second annulus. China (Fujian), Thailand |
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– | Black macula on frons laterally touching eye or head almost entirely black; first ctenidium straight or weakly basally curved at middle; distance between lower end of second annulus and apex of lancet 1.6–2.5× the height of second annulus |
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9 | Mesoscutal median and lateral lobes entirely black; second trochanters white; lancet with 9 annuli |
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– | Mesoscutal median lobe with distinct pale lateral maculae; head black with labrum, clypeus, supraclypeal area and dorsal margin of head pale, trochanters black; lancet narrow with 10 annuli, annulus 1 about 1.0–1.1× length of annulus 2 and both oblique, annuli 2 and 3 parallel, distance between lower end of annulus 2 and apex of lancet about 2× the height of second annulus. China (Anhui) |
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10 | Lancet with annulus 1 about 0.7× length of annulus 2 and both perpendicular, distance between lower end of second annulus and apex of lancet about 2.3× height of second annulus as measure perpendicular to the longitudinal axis of the lancet, serrulae 2–5 with distinct teeth (Fig. |
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– | Lancet with annulus 1 about 1.2–1.3× length of annulus 2 at middle, first annulus weakly curved and distinctly oblique, distance between lower end of second annulus and apex of lancet about 1.6× the height of second annulus as measure perpendicular to the longitudinal axis of the lancet, serrulae 2–6 flat (Fig. |
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11 | Annulus 1 with a distinct serrula (Fig. |
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– | Annulus 1 without serrula (Figs |
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12 | Body reddish brown; ocellar area with a short dark transverse band; mesoscutellum, central part of pronotum and most of lateral mesoscutal lobe black (median mesoscutal lobe sometimes with black triangular mark); tergum 1 black. Lancet in Fig. |
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– | Body yellowish brown; ocellar area pale without black marks; pronotum, median mesoscutal lobe, lateral mesoscutal lobe and tergum 1 pale; mesoscutellum black. China (Hebei) | * |
13 | Ctenidium 1 broken at middle (Fig. |
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– | Ctenidium 1 entire; lateral mesoscutal lobe pale with dark marks or entirely black |
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14 | Annuli 1 and 2 straight and parallel (Fig. |
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– | Annuli 1 and 2 curved and divergent downwards (Figs |
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15 | Annuli 1 and 2 distinctly divergent ventrally, basal serrulae acute (Fig. |
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– | Annuli 1 and 2 weakly divergent ventrally, basal serrulae truncate (Fig. |
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Lancets
Sixteen species of
Photograph of light trap used to collect the new species, by Ze-Jian Li (10 August 2021).
Habitus photograph of the new species by Jun-Feng Wang (10 August 2021).
Collection of the new species by light trap was photographed by Zejian Li (Fig.
The authors are deeply grateful to Mr. Spencer Monckton and Dr. Marko Prous referees for valuable comments and suggestions. This research was partly supported by the scientific research project of Baishanzu National Park (No. 2021KFLY08), Background investigation of insect biodiversity in Jinyun County (No. WHT-HX-2021-0123-22), the National Natural Science Foundation of China (grant No. 31970447), starting fund for doctoral research of Lishui University (No. 6004LMM01Z) and special fund for scientific research of postdoctoral work station assessment in Zhejiang Province, China (No. 2021).