Neolinycus Heinrich, 1971

Dal Pos, Davide, Heilman, Victoria & Welter-Schultes, Francisco, 2022, Platylabini (Hymenoptera: Ichneumonidae: Ichneumoninae) of the south-eastern United States: new distributional data, taxonomic notes, illustrated keys, and an annotated catalogue of the genera and species, Journal of Natural History 56, pp. 1869-1938 : 1896

publication ID	https://doi.org/10.1080/00222933.2022.2134061
DOI	https://doi.org/10.5281/zenodo.7397663
persistent identifier	https://treatment.plazi.org/id/03DD87D3-FFC0-FF82-55E3-9313FDF0694A
treatment provided by	Plazi (2022-12-05 07:35:36, last updated 2024-11-26 04:53:03)
scientific name	Neolinycus Heinrich, 1971
status

Treatment

Neolinycus Heinrich, 1971 View in CoL View at ENA

Neolinycus Heinrich, 1971: 1025 View in CoL .

Type species: Neolinycus michaelis Heinrich, 1971 View in CoL , by original designation.

Comparative diagnosis

From all the other four Nearctic Platylabini genera with small circular or roundish propodeal spiracles – Apaeleticus , Carlsonia , Cyclolabus and Linycus – Neolinycus can be easily distinguished by the combination of several characters. The structure of gastrocoeli, which are never strongly pronounced, and thyridia, not larger than the space between them ( Figures 20b, 20d, 20f View Figure 20 ), sets Neolinycus apart from Cyclolabus . In addition to these features, the presence of distinct propodeal carinae ( Figures 20b, 20d, 20f View Figure 20 ) allows separation from Apaeleticus (which has a strongly reticulated and completely areolated propodeum ( Figure 7a View Figure 7 )) ( Heinrich 1961, 1962b, 1977; Tereshkin 2009). Neolinycus differs from Carlsonia and Linycus by the strongly reduced temple profile, which slopes down abruptly and almost perpendicularly to the hind margin ( Figures 20d, 20e View Figure 20 ). Moreover, Linycus also presents a pentagonal areolet ( Figure 15b View Figure 15 ), while this feature is clearly rhomboidal in Neolinycus ( Figure 20e View Figure 20 ) ( Heinrich 1977; Tereshkin 2009).

Range and diversity

Neolinycus is a monotypic genus with a Nearctic distribution. The only species known, Neolinycus michaelis Heinrich, 1971 , has been subdivided by Heinrich (1972, 1977) into three subspecies – the nominotypical one, N. michaelis arkansae Heinrich, 1977 , and N. michaelis georgianus Heinrich, 1971 – all occurring in the south-eastern United States ( Heinrich 1977; Yu et al. 2016). Below, we provide evidence in support of the synonymisation of the ssp. arkansae with ssp. michaelis and the confirmation of Carlson’s (1979, p. 542) synonymisation of the ssp. georgianus with the nominotypical subspecies based on several specimens collected in Florida.

References

Carlson RW. 1979. Family Ichneumonidae. In: Krombein KV, Hurd PD Jr., Smith DR, Burks BD, editors. Catalog of Hymenoptera in America North of Mexico. Vol 1. Washington (DC): Smithsonian Institution Press; p. 315 - 741.

Heinrich G. 1961. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the Northeastern Region (Hymenoptera). Part I. Introduction, key to Nearctic genera of Ichcneumoninae Stenopneusticae, and synopsis of the Protichneumonini north of Mexico. Can Entomol. 15: 1 - 88. doi: 10.4039 / entm 9215 fv.

Heinrich G. 1962 b. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the Northeastern Region (Hymenoptera). Part VI. Synopsis of the lchneumonini (Genus Plagiotrypes), Acanthojoppini, Listrodromini and Platylabini. Can Entomol. S 27: 677 - 802. doi: 10. 4039 / entm 9427 fv.

Heinrich G. 1971. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the northeastern region (Hymenoptera). Supplement 2. Le Naturaliste Canadien. 98: 959 - 1026.

Heinrich G. 1972. Synopsis of Nearctic Ichneumoninae Stenopneusticae with particular reference to the northeastern region (Hymenoptera). Supplement 3. Le Naturaliste Canadien. 99: 173 - 211.

Heinrich G. 1977. Ichneumoninae of Florida and neighboring states (Hymenoptera: lchneumonidae, subfamily Ichneumoninae). Arthropods Florida Neighboring Land Areas, Florida Dept Agric Consum Serv. 9: 1 - 350.

Tereshkin AM. 2009. Illustrated key to the tribes of subfamilia Ichneumoninae and genera of the tribe Platylabini of world fauna (Hymenoptera, Ichneumonidae). Linzer biologische Beitrage. 41: 1317 - 1608.

Yu D, Van Achterberg C, Horstmann K. 2016. Taxapad 2016, Ichneumonoidea 2015. Database on flash-drive. Nepean (Canada).

Figures

Figure 7. Apaeleticus americanus Cushman, 1926, holotype ♀. a) Habitus, dorsal view. b) Head, frontal view. c) Habitus, lateral view. d) Labels.Downloaded from the public USNM database (available also at http://n2t.net/ark:/65665/3b8484f3e-e496-4e57-a931-64842bace133).

Figure 15. Linycus exhortaor thoracicus (Cresson, 1864), ♀. a) Habitus, dorsal view. b) Habitus, lateral view. c) Head, frontal view. d) Propodeum and metasoma, dorsal view.

Figure 20. Neolinycus michaelis Heinrich, 1971, colour variation. a) Habitus, lateral view, ♂. b) Habitus, dorsal view, ♂. c) Habitus, dorsal view, ♂. d) Habitus lateral view, ♂. e) Habitus, lateral view, ♀. f) Habitus, dorsal view, ♀.