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Kaliwatan sa insekto ang Quadrastichus longicorpus.^[1] Una ning gihulagway ni Muhammad Sharif Khan ug Shafee ni adtong 1988.^[2] Ang Quadrastichus longicorpus sakop sa kahenera nga Quadrastichus, ug kabanay nga Eulophidae.^[1][3] Walay nalista nga matang nga sama niini.^[1]

1. ↑ ^{1.0 1.1 1.2} Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2019). "Species 2000 & ITIS Catalogue of Life: 2019 Annual Checklist". Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X. TaxonID: 4537214. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Hayat, M.; Shahi, M.H. (2004) Taxonomic notes on Indian Eulophidae (Hymenoptera: Chalcidoidea) - 1. On the types of some Tetrastichinae. , JOURBOOK: Oriental Insects VOLUME: 38 PAGES: 303-314
3. ↑ Noyes J. (2019). UCD: Universal Chalcidoidea Database (version Sep 2007). In: Species 2000 & ITIS Catalogue of Life, 2019 Annual Checklist (Roskov Y., Ower G., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., Nieukerken E. van, Zarucchi J., Penev L., eds.). Digital resource at www.catalogueoflife.org/annual-checklist/2019. Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X.