Arescon, Walker, 1846

Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2020, Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico, Zootaxa 4773 (3), pp. 1-411 : 79

ARESCON Walker, 1846

( Figs 142–162 )

Arescon Walker, 1846: 50 . Type species: Mymar dimidiatus Curtis, 1832 , by monotypy.

Leimacis Foerster, 1847: 208 . Type species: Leimacis rufula Foerster, 1847 , by monotypy. Synonymy by Foerster, 1856: 119.

Limacis Foerster, 1856: 120 . Unjustified emendation.

Xenomymar Crawford, 1913: 349 . Type species: Xenomymar urichi Crawford, 1913 , by monotypy. Synonymy by Annecke & Doutt, 1961c: 12.

Neurotes Enock, 1914 : cxxxiv. Type species: Neurotes iridescens Enock, 1914 , by monotypy. Synonymy by De Santis, 1967: 102.

Diagnosis. Body length 595 μm (n=1). Funicle 5-segmented ( Fig. 145 ); fore wing ( Fig. 146 ) with venation extend- ing at least 0.66× wing length; marginal vein longer than submarginal vein and 2× as long as parastigma; postmarginal vein absent; 2 distal macrochaeta present. Male genitalia with two rod-like parameres.

Discussion. Only three specimens (CNC) of Arescon from America north of Mexico were seen. Arescon aspidioticola Ashmead (1879) , catalogue by Peck (1963: 51) and placed in Arescon , is probably correctly placed in Aphelinidae as discussed by Schauff (1984a: 39), so no named species are represented in the Nearctic. Incidentally, that species appears, incorrectly, under Mymaridae in the checklist of Chalcidoidea of Malta ( Askew & Mifsud 2016). Arescon has 5-segmented tarsi and represents an early lineage that appears to be most closely related to Kikiki Huber & Beardsley and Tinkerbella Huber & Noyes with 3- and 4-segmented tarsi, respectively; the latter two genera occur in the New World but have not yet been found in the Nearctic. Four other apparently related genera occur only in the Old World (Huber 2017).

Nearctic hosts. Unknown. An extralimital host is in Hemiptera : Cicadellidae ( Subba Rao 1966) .

Important references. Ogloblin (1957) treated the Neotropical species (as Xenomymar ), Triapitsyn & Berezovskiy (2003, 2004a) treated the Palaearctic species and Triapitsyn (2016) treated the Oriental species.

Arescon spp. The few specimens examined appear to represent two species. Distribution. USA: AL, FL.

Figures

FIGURE 142. Arescon sp., habitus. USA, Alabama, Mobile Co., Chunchula, 20.vi.2004, E. Benton. Scale bar=500 μm.

FIGURES 143–146. Arescon sp. 143, head, anterior; 144, head, posterior; 145, antenna; 146, wings. Scale bars: 143–145=50 μm; 146=100 μm.

FIGURES 147, 148. Arescon sp. 147, mesosoma, dorsal; 148, metasoma, lateral. Scale bars=100 μm.

FIGURES 149–154. Arescon dimidiatus (Curtis), head (Czech Republic). 149, anterior; 150, posterior; 151, lateral; 152, dorsal; 153, ventral; 154, mouthparts. Scale bars=20 μm.

FIGURES 155–162. Arescon dimidiatus (Curtis). 155, mesosoma, dorsal; 156, mesosoma, lateral; 157, mesosoma, ventral; 158, metasoma, dorsal; 159; metasoma, lateral; 160, metasoma, ventral; 161, male gaster apex, dorsal; 162, male gaster apex, lateral. Scale bars: 155–160=50 μm; 161, 162=10 μm.