Description of three new species and new distributional data for three species of Homalotylus (Hymenoptera, Encyrtidae) from China
Author
Zu, Guohao
https://orcid.org/0000-0002-9892-2171
College of Life Sciences, Nankai University, Tianjin, 300071, China & College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300384, China
Author
Xue, Hao
https://orcid.org/0000-0002-4058-1298
College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300384, China
Author
Wang, Haiyang
https://orcid.org/0009-0007-5665-2111
College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300384, China
Author
Zhen, Wenquan
https://orcid.org/0000-0002-7222-2775
Ocean College, Tangshan Normal University, Tangshan, Hebei, 063000, China
zhenwq@bbgu.edu.cn
Author
Huang, Dawei
College of Life Sciences, Nankai University, Tianjin, 300071, China
huangdw@ioz.ac.cn
text
ZooKeys
2023
2023-11-21
1184
273
289
http://dx.doi.org/10.3897/zookeys.1184.113292
journal article
http://dx.doi.org/10.3897/zookeys.1184.113292
1313-2970-1184-273
8D9A5A7AA9464EB89566DDFA83DC63C8
3C125146CB565E8CAB62C06974292FA0
Homalotylus bicolor Zu
sp. nov.
Figs 1-6
, 7-12
Type materials.
Holotype
.
♀ [on slide], China, Guangxi Province, Qinzhou City, Beibu Gulf University,
21°53'53"N
,
108°36'56"E
, c. 24 m, 06-26.X.2019, Wen-Quan Zhen, Malaise trapping.
Paratypes
.
♀♂ [on slides], China, Guangxi Province, Qinzhou City, Beibu Gulf University,
21°53'53"N
,
108°36'56"E
, c. 24 m, 06-13.X.2019, Wen-Quan Zhen, Malaise trapping.
Description.
Female.
Holotype. Length, 2.20 mm (excluding ovipositor). Head generally orange yellow, with genae, frontovertex and occiput dark brown. Antennae dark brown, F4 mostly white with lower margin brown, F5, F6 and clava white. Mesosoma dark brown with shallow metallic green sheen, scutellum mostly orange yellow, only with a brown area at base; legs dark brown, except for apical 3/5 of mid tibia, mid tibial spur, mid and hind tarsus 1-4 white. Metasoma dark brown.
Head (Fig.
1
) with numerous conspicuous setae on frontovertex, each about as long as diameter of posterior ocellus. Head in front view 1.16
x
higher than wide. Frontovertex 0.22
x
head width. Ocelli forming an angle of 33°, posterior ocelli close to eye margin, distance to occipital margin 1.50
x
the diameter of anterior ocellus. Malar space 0.18
x
eye height. Antennal torulus with its dorsal margin slightly below lower eye margin and very close to oral margin, and the distance of antennal torulus by 1.95
x
its own height. Antennal (Fig.
2
) scape slender, 8.42
x
as long as wide; pedicel 2.5
x
as long as wide, 1.5
x
as long as F1; all funicle segments longer than wide, F1 1.57
x
as long as wide, F6 1.11
x
as long as wide; funicle with linear sensilla on all segments; clava 3-segmented, 3.40
x
as long as wide, and as long as F4-F6 combined, apex strongly obliquely truncate, truncate part approach to the base of the clava. Measurements (μm): HH, 580; HW, 500; FV, 108; EL, 490; MS, 88; OD, 38; POL, 38; OCL, 58; AOL, 78; length and (width)-radicle, 105; scape, 400 (48); pedicel, 125 (50); F1, 83 (53); F2, 70 (55); F3, 75 (58); F4, 73 (60); F5, 70 (63); F6, 70 (63); clava, 213 (63).
Mesosoma (Fig.
3
) with sculpture on dorsum similar to that on frontovertex but that on mesoscutum a little shallower; notaular lines conspicuous but not quite meeting at middle of posterior margin of mesoscutum. Mesoscutum 0.72
x
as long as wide; scutellum 0.94
x
as long as wide. Fore wing (Fig.
4
) 2.65
x
as long as wide; linea calva interrupted by 4 lines of setae and closed by 5 lines of setae posteriorly; marginal vein 0.44
x
as long as stigmal vein, and about half the length of postmarginal vein. Hind wing (Fig.
5
) 3.73
x
as long as wide. Length of mid tibial spur (Fig.
6
) 0.48
x
of mid tibia and longer than mid basitarsus. Measurements (μm): FWL, 1325; FWW, 500; SMV, 600; MV, 50; PMV, 100; SV, 113; HWL, 970; HWW, 260; MT, 810; mid tibial spur, 390; mid basitarsus, 360.
Ovipositor (Fig.
3
) 1.26
x
as long as mid tibia, distinctly exserted. Measurements (μm): OL, 1020.
Male.
Length, 1.67 mm. Color is similar to female, except for F4 completely brown.
Head (Fig.
7
) in front view 1.11
x
higher than wide. Frontovertex 0.23
x
head width, ocelli forming an angle of about 35°. Malar space 0.17
x
eye height. Antennal torulus with its dorsal margin slightly below lower eye margin and very close to oral margin. Antennal (Fig.
8
) scape slender, about 5.9
x
as long as wide; pedicel 2.18
x
as long as wide, 1.40
x
as long as F1; all funicle segments longer than wide; clava unsegmented, 3.72
x
as long as wide.
Mesoscutum (Fig.
9
) 0.58
x
as long as width; scutellum 0.9
x
as long as width. Fore wing (Fig.
10
) 2.65
x
as long as width. Hind wing (Fig.
11
) 3.86
x
as long as width. Length of mid tibial spur (Fig.
12
) about 0.44
x
of mid tibia and longer than mid basitarsus.
Figures 1-6.
Homalotylus bicolor
Zu, sp. nov., holotype female
1
head
2
antenna
3
mesosoma and metasoma
4
fore wing
5
hind wing
6
legs. Scale bars: 100
μm
.
Aedeagus (Fig.
9
) about 1.34
x
as long as mid tibia.
Host.
Unknown.
Etymology.
The specific name refers to its coloration of mesosoma.
Diagnosis.
The new species may be distinguished from
H. scutellaris
Tan & Zhao, 1997 and
H. mundus
Gahan, 1920, by the following characters: scape 8.42
x
as long as wide (6
x
in
H. scutellaris
), clava 3-segmented (unsegmented in
H. scutellaris
), metanotum and propodeum dark brown (yellow brown in
H. scutellaris
); F4 mostly white, mixed with brown on lower margin (completely white in
H. mundus
), axillae brown (pale orange yellow in
H. mundus
), pedicel 2.5
x
as long as wide (nearly 3
x
in
H. mundus
).
Figures 7-12.
Homalotylus bicolor
Zu, sp. nov., paratype male
7
head
8
antenna
9
mesosoma and metasoma
10
fore wing
11
hind wing
12
legs. Scale bars: 100
μm
.