Chelonus Panzer 1806
Creators: name: Zhou, Jin-Jin
name: Achterberg, Kees Van
name: Tang, Pu
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Chelonus

description: Key to subgenera of Chelonus Panzer
1 Temple strongly swollen and with three distinct ridge-like rugae........ Scabrichelonus He, Chen & van Acheterberg, 1997
- Temple hardly or not swollen and without distinct ridge-like rugae.............................................. 2
2 Metasomal carapace open ventro-apically (thus ventral opening reaching apex of carapace) and protruding apically, at least as long as combined length of head and metasoma........................................ Arichelonus Viereck, 1913
- Metasomal carapace more or less closed apically............................................................ 3
3 Metasomal carapace with one or two apical teeth............................................................ 4
- Metasomal carapace rounded dorso-apically (but minute apical tooth often present in Stylochelonus)................... 5
4 Metasomal carapace with a dorso-apical spine-like protuberance; vein SR1 of fore wing sometimes incomplete; carapace with narrow straight lamella ventrally; [apical half of antenna widened]............................ Areselonus Braet, 1999
- Metasomal carapace with two ventro-apical tooth-like protuberances; vein SR1 of fore wing complete; carapace with undulating lamella ventrally; [apical half of antenna distinctly widened and antennomeres longer than wide; antenna of female with 16 antennomeres]................................................................... Megachelonus Baker, 1926
5 Head cubical; in dorsal view interocular width slightly more than width of eye and distinctly convexly extended beyond eyes; posterior face of propodeum not separated from anterior face by a transverse rim.............. Cubochelonus Baker, 1926
- Head distinctly transverse; in dorsal view interocular width always distinctly greater than width of eye and at most slightly extended beyond eyes; posterior face of propodeum always separated from anterior face by a transverse rim............. 6
6 Third–fifth antennomeres of female 6.0–7.0 × longer than wide; frons without distinct curved lateral carina; scutellum more or less protuberant above level of mesoscutum; vein 1-M usually comparatively close to vein C+SC+R); [female with 16 antennomeres]............................................................ Baculonus Braet & van Achterberg, 2001
- Third–fifth antennomeres of female distinctly less than 5.0 × longer than wide, if about 5.0 × then frons with distinct curved lateral carina; scutellum not protruding above level of mesoscutum; vein 1-M usually more removed from vein C+SC+R.... ................................................................................................... 7
7 Frons deeply excavated posteriorly and smooth; carapace very broadly truncate apically and ventral opening slightly longer than half length of carapace, opening surrounded by a lamelliform carina................... Carinichelonus Tobias, 2000
- Frons shallowly excavated posteriorly, and more or less sculptured; carapace more or less narrowed apically and ventral opening usually distinctly longer than half length of carapace, and opening usually without a lamelliform carina.............. 8
8 Third tergite of metasomal carapace almost straightly narrowed posteriorly in dorsal view (Fig. 2E); apex of metasomal carapace of both sexes truncate and narrow in dorsal view (Figs 2E, 4E) and oblique in lateral view (Figs 2D, 4D); carapace of male deeply incurved (about one fourth of total length of carapace) in lateral view (Fig. 4D)......... Mirachelonus subgen. nov.
- Third tergite of metasomal carapace hardly or not narrowed posteriorly in dorsal view; apex of metasomal carapace round posteriorly or nearly so in dorsal and lateral view; carapace of male gradually rounded in lateral view.................. 9
9 Antennomeres of female 16; carapace of male with apical opening.................................................................................................................... Microchelonus Szépligeti, 1908 s. str. Notes. Tobias (2011) introduced a new monotypic subgenus Rasnichelonus for Microchelonus elongatus Papp, 1971, because of its elongate body, head expanding behind eyes and shallow apical aperture of male metasoma. In our opinion the differences with other species are too variable to deserve a subgeneric status.
- Antennomeres of female more than 16; carapace of male variable, usually without distinct opening................... 10
10 Antennomeres of female 30–32; carapace of male with deep apical opening; body at least 5.0 mm long................................................................................................ Parachelonus Tobias, 1995
- Antennomeres of both sexes 17–26; carapace of male variable, often closed; length of body variable.................. 11
11 Metasomal carapace of male with small apical opening, which may be filled by point-like sclerite; carapace of female usually with an apical tooth; [mesosoma at least 1.5 × longer than high]........................... Stylochelonus Hellén, 1958
- Metasomal carapace of male closed apically and without opening or point-like sclerite posteriorly; carapace of female without apical tooth.................................................................... Chelonus Panzer, 1806 s. str.
description: Published as part of Zhou, Jin-Jin, Achterberg, Kees Van, Tang, Pu & Chen, Xue-Xin, 2022, A new subgenus of Chelonus Panzer, 1806 (Braconidae: Cheloninae) from China, pp. 288-294 in Zootaxa 5115 (2) on page 289, DOI: 10.11646/zootaxa.5115.2.8, http://zenodo.org/record/6352481