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Key to species of Idarnes incertus species-group

(from Farache et al., 2016)

(Life: Kingdom: Metazoa (animals); Phylum: Arthropoda; Class: Hexapoda; Order: Hymenoptera;  Superfamily: Chalcidoidea; Family: Agaonidae; Subfamily: Sycophaginae; Genus: Idarnes)

Fig wasp keysAgaonidae keys

1        Body completely black or dark brown, including pronotum and propodeum (1a). Scrobal depression and face engraved to reticulated (1b) …  2 

1’       Body not completely black. Pronotum yellow at least laterally, or propodeum yellow (1’a). Scrobal depression mostly smooth, face sculpture engraved to reticulated (1’b) … 4


2        Mesoscutum and scutellar-axillar complex strongly curved in lateral view (2a). Supraclypeal area narrower than torulus (2b). Frenal sulcus crenulated and conspicuous (2c). Metascutellum nearly as long as, or longer than frenum (2c). Ex F. americana subsp. andicola. …  Idarnes gibberosus Farache & Rasplus, 2016


2’       Mesoscutum and scutellar-axillar complex not strongly curved in lateral view (2’a). Supraclypeal area as wide as, or wider than torulus (2’b). Frenal sulcus not crenulated (2’c). Metascutellum inconspicuous in dorsal view (2’c). Ex F. hartwegii. … 3


3        Frons becoming yellowish near clypeus. Supraclypeal area as wide as torulus (Fig. 4G). Antenna with two anelli (Fig. 6G). Postmarginal vein nearly absent (Fig. 14G). Ex F. hartwegii. … Idarnes comptoni Farache & Rasplus, 2016


3’       Frons completely black. Supraclypeal area wider than torulus (3’a). Antenna with one anellus (3’b). Postmarginal vein nearly as long as 0.5Χ stigmal vein length (3’c). Ex F. hartwegii. … Idarnes hansoni Bouček, 1993


4        Head and mesosoma brown black in lateral view; pronotum yellow (4a), at least laterally, or propodeum yellow dorsally (4b) …  5


4’       Head and mesosoma predominantly yellow in lateral view (4’a) … 9


5        Axillula reticulated, without longitudinal striae (Fig. 13A). Notauli not crenulated (Fig. 13A). Ex F. americana. … Idarnes flavicrus Farache & Rasplus, 2016


       Axillula longitudinally striated (5’a). Notauli at least slightly crenulated (5’b) … 6


6        Propodeum dorsally yellow (6a). Frenal sulcus conspicuous (6b). Body length 1.8-2.1 mm …  7


       Propodeum dorsally brown (6’a). Frenal sulcus inconspicuous (6’b). Body length 1.3-1.6 mm …  8


7        Pronotum laterally brown. Legs brown (7a). Ovipositor 1.1-1.3Χ hind tibia length (7b). Ex F. americana & F. costaricana. … Idarnes americanae Farache & Rasplus, 2016


7’       Pronotum laterally yellow. Legs predominantly yellow. Ovipositor 1.5Χ hind tibia length (Fig. 2H). Ex F. cremersi. … Idarnes cremersiae Farache & Rasplus, 2016


8        Hind coxae yellow (8a). Propodeal median line absent (8b). Ex F. americana subsp. guianensis form mathewsii. … Idarnes amazonicus Farache & Rasplus, 2016


       Hind coxae brown (8’a). Propodeal median line present as a faint longitudinal reticulation (8’b). Ex F. colubrinae. … Idarnes brunneus Farache & Rasplus, 2016


9        Ovipositor nearly 2.5Χ as long as hind tibia or longer (9a) … 10


9’       Ovipositor as long as or shorter than 2Χ hind tibia (as in Figs 2I, 3I, J) … 12


10      Metasoma laterally yellow, dorsally with brown black transversal stripes (10a). Frenal sulcus conspicuous (10B). Ex F. aurea form isophlebia … Idarnes flaviventris Farache & Rasplus, 2016


10’     Metasoma black (10’a). Frenal sulcus inconspicuous, sparsely crenulated (10’b) …  11


11      Scutellar-axillar complex dorsally black (11a). Supraclypeal area narrower than torulus (11b). Anterior margin of propodeum angulose medially (11c). First funicular segment with 12–17 multiporous late sensilla (11d). Ex F. obtusifolia. … Idarnes maximus Farache & Rasplus, 2016


11’     Mesosoma dorsally yellow (11’a). Supraclypeal area wider than torulus (11’b). Anterior margin of propodeum concave medially (11’c). First funicular segment with 6–8 multiporous plate sensilla (11’d). Ex F. popenoei. … Idarnes gordhi Farache & Rasplus, 2016


12      First funicular segment with more than four multiporous plate sensilla (12a). Habitus (12b) …  13


12’     First funicular segment with four our less multiporous plate sensilla (12’a). Habitus in (12’b). Colombia, Ex F. pertusa …  18


13      Ovipositor as long as, or shorter than hind tibia (13a). Ex F. citrifolia … 14


13’     Ovipositor longer than hind tibia (13’a) … 15


14      Metasoma laterally yellow (14a). Subantennal groove as long as torulus (14b). Supraclypeal area wider than torulus (14b). Ex F. citrifolia … Idarnes brevis Farache & Rasplus, 2016


14’     Metasoma entirely black (14’a). Subantennal groove longer than torulus (14’b). Supraclypeal area as wide as torulus (14’b). Ex F. citrifolia … Idarnes dimorphicus Farache & Rasplus, 2016


15      Ovipositor 1.8–2Χ as long as hind tibia (15a). Supraclypeal area narrower than torulus (15b) …  16


15’     Ovipositor 1Χ to 1.5Χ as long as hind tibia (15’a). Supraclypeal area as wide as torulus or wider (15’b) …  17


16      Metasoma ventrally yellow (Fig. 3I). Distance from torulus to median ocellus 1.4Χ distance from torulus to oral margin (Fig. 5I). Antenna with one anellus. Ex F. crocata …  Idarnes pseudoflavus Farache & Rasplus, 2016


16’     Metasoma ventrally brown-black (Fig. 3H). Distance from torulus to median ocellus 0.9Χ distance from torulus to oral margin (Fig. 3H). Antenna with 2 anelli. F. aurea form isophlebia …  Idarnes nigriventris Farache & Rasplus, 2016


17      Scutellar-axillar complex smoky yellow, propodeum more yellow (17a). Metasoma brown black (17b). POL 3Χ OOL (17c). Ex F. americana subsp. Americana …  Idarnes ramirezi Farache & Rasplus, 2016


17’     Scutellar-axillar complex yellow, nearly same colour as propodeum (Fig. 11F). Metasoma brown black, first tergite and ventral region yellow (Fig. 3F). POL 2.2Χ OOL Ex F. aurea & F. citrifolia …  Idarnes incertus (Ashmead, 1900)


18      Head and mesosoma dorsally brown, slightly metallic green (Fig. 8D). Frenal sulcus inconspicuous (Fig. 12D). Propodeal median line inconspicuous (Fig. 12D).  Ex F. pertusa …  Idarnes badiovertex Farache & Rasplus, 2016


18’     Head and mesosoma yellow (Fig. 8A). Frenal sulcus conspicuous (Fig. 12A). Propodeal median line present, traceable at least in the anterior half of propodeum (Fig. 12A).  Ex F. pertusa …  Idarnes amacayacuensis Farache & Rasplus, 2016


Farache FHA, Cruaud A, Genson G, Rasplus J, & Pereira RAS. 2017. Taxonomic revision and molecular phylogenetics of the Idarnes incertus species-group (Hymenoptera, Agaonidae, Sycophaginae). PeerJ 5:e2842 https://doi.org/10.7717/peerj.2842


Photographs © Fernando Farache (FFCLRP-USP, Ribeirγo Preto).

Web authors Simon van Noort (Iziko South African Museum)

and Jean-Yves Rasplus (INRA, France)


Citation: van Noort, S. & Rasplus, JY. 2021. Figweb: figs and fig wasps of the world. URL: www.figweb.org(Accessed on <day-month-year>).

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