Discovery of the chelonine tribeAdeliini Viereck, 1918 (Hymenoptera: Braconidae) from the Indian subcontinent with the description of a new genus from south India Author Ranjith, A. P. Insect Ecology and Ethology Laboratory, Department of Zoology, University of Calicut, Kerala, Pin: 673635, India Author Achterberg, C. Van 0000-0002-6495-4853 Department of Terrestrial Zoology, Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, the Netherlands kees @ vanachterberg. org; https: // orcid. org / 0000 - 0002 - 6495 - 4853 kees@vanachterberg.org Author Samartsev, K. G. 0000-0002-9920-7583 Laboratory of Experimental Entomology, Zoological Institute, Russian Academy of Sciences, 1 Universitetskaya naberezhnaya, Saint Petersburg 199034, Russia. k. samartsev @ gmail. com; https: // orcid. org / 0000 - 0002 - 9920 - 7583 k.samartsev@gmail.com Author Nasser, M. 0000-0002-6460-1839 Insect Ecology and Ethology Laboratory, Department of Zoology, University of Calicut, Kerala, Pin: 673635, India & drnasher @ gmail. com; https: // orcid. org / 0000 - 0002 - 6460 - 1839 drnasher@gmail.com text Zootaxa 2021 2021-02-04 4926 1 1 25 journal article 8321 10.11646/zootaxa.4926.1.1 42f6270b-393f-491a-aa48-78f60f28eeec 1175-5326 4500470 F151B4E4-26FD-42CE-9F4D-0D8931AAF93F Key to genera of the tribe Adeliini Viereck 1. Metasoma smooth, sometimes first metasomal tergite basally sculptured, weakly rugulose or crenulate-rugose ( Figs 2B , 4E , 6C , 8B , 10D , 11D ); suture between first and second metasomal tergites absent or indistinct ( Figs 2B , 4E , 6C , 8B , 10D , 11D ).. ................................................................................................... 2 - Metasomal tergites 1–3 often sculptured, sometimes third metasomal tergite smooth (in Paradelius ) ( Figs 12G , 14B , 16B , 18A ); suture between first and second metasomal tergites distinct (except Sculptomyriola ), often crenulate ( Figs 12G , 14B , 16B , 18A )........................................................................................... 4 2. Occipital carina absent ventrally, not fused with hypostomal carina ( Figs 1A & E ); propodeum not divided into anterior and posterior parts, with distinct midlongitudinal carina posteriorly, and lateral vertical carinae, with marginated smooth areas ( Fig. 1F ); fore wing vein r absent ( Fig. 2C ); fore wing vein cu-a postfurcal ( Fig. 2C )................................................................................................. Carinadelius Ranjith & van Achterberg , gen. nov. - Occipital carina present ventrally, fused with hypostomal carina ( Figs 4A , 6A , 8A , 10A , 14A , 16A ); propodeum either divided or not divided into anterior and posterior parts, without midlongitudinal carina posteriorly, often without vertical lateral carina and marginated areas of propodeum often sculptured ( Figs 1F , 4D & E , 6C , 8B , 10C & D , 11D ); fore wing vein r absent or present ( Figs 4F , 6D , 7A , 10E , 11A ); fore wing vein cu-a antefurcal or postfurcal ( Figs 4F , 6D , 7A , 10E , 11A )........... 3 3. Eyes glabrous or short setose ( Figs 9C , 11K ); fore wing vein 1-R1 completely absent ( Figs 7A , 9A , 11A ); fore wing vein 1-SR often present and narrow ( Figs 7A , 9A , 11A ); length of malar space smaller than basal width of mandible ( Figs 7B , 9C , 11K ); clypeus more than 0.75 × as wide as face ( Figs 7B , 9C , 11K )........................... Myriola Shestakov re-instated - Eyes long setose ( Figs 3D , 5E ); fore wing vein 1-R1 present ( Figs 3A , 4F , 6D ); fore wing vein 1-SR often absent, if present wide ( Figs 3A , 4F , 6D ); length of malar space larger than basal width of mandible ( Figs 3D , 5B ); clypeus less than 0.75 × as wide as face ( Figs 3D , 5B ).................................................................. Adelius Haliday 4. Prepectal carina absent (16D); third metasomal tergite entirely sculptured ( Figs 15B , 16B ); fore wing vein 1SR+M often connected with 1-M ( Fig. 16C ); propodeum distinctly divided into anterior and posterior part, with distinct submedian transverse carina ( Figs 16B & D ); male genitalia with indistinctly developed digitus; apical sternite of male narrow, sparsely setose apically; antenna with 20 antennomeres.............................................. Sculptomyriola Belokobylskij - Prepectal carina present ( Fig. 12H ); third metasomal tergite smooth, sometimes basally sculptured ( Figs 12G , 14B , 17F , 18A ); fore wing vein 1SR+M connected with parastigma ( Figs 12A , 13A , 14C , 18C ); propodeum either divided or not divided into anterior and posterior part, with distinct submedian carina ( Figs 12B , 17F , 18A ); male genitalia with distinctly developed digitus (unknown in Sinadelius ); apical sternite of male broad, setose apically (unknown in Sinadelius ); antenna with 20–22 antennomeres........................................................................................ 5 5. Second metasomal suture absent ( Figs 17F , 18A ); second metasomal tergite sculptured basally, smooth apically ( Figs 17F , 18A ); third metasomal tergite smooth ( Figs 17F , 18A ); propodeum mostly smooth with distinct medial transverse carina ( Figs 17F , 18A ); antenna with 22 antennomeres................................................. Sinadelius He & Chen - Second metasomal suture present ( Fig. 12G ); second metasomal tergite sculptured entirely ( Fig. 12G ); third metasomal tergite sculptured at least basally ( Fig. 12G ); propodeum mostly sculptured, often without medial transverse carina ( Figs 12B , 14B ); antenna with 20 antennomeres.......................................................... Paradelius de Saeger