Chelonastichus hanssoni Ranjith & Quicke, 2025

Ranjith, Avunjikkattu Parambil, Quicke, Donald L. J., Chansri, Kittipum & Butcher, Buntika A., 2025, Chelonastichus Ranjith & Quicke, gen. nov. (Hymenoptera, Eulophidae, Tetrastichinae) from Thailand: the first eulophid with a metasomal carapace, Journal of Hymenoptera Research 98, pp. 499-507 : 499-507

publication ID	https://doi.org/10.3897/jhr.98.144864
publication LSID	lsid:zoobank.org:pub:A754CCBF-18B9-42D6-ABD6-2D6FFFA24BD0
DOI	https://doi.org/10.5281/zenodo.15270910
persistent identifier	https://treatment.plazi.org/id/06098C96-CDAC-5C0C-839F-4DE1FB418DF5
treatment provided by	Journal of Hymenoptera Research by Pensoft
scientific name	Chelonastichus hanssoni Ranjith & Quicke
status	sp. nov.

Treatment

Chelonastichus hanssoni Ranjith & Quicke sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3

Description.

Female, holotype. Length 2.6 mm.

Head. Eye setose (Figs 1 A – E View Figure 1 , 2 E View Figure 2 ); F 1 slightly shorter than F 2 (Fig. 2 E View Figure 2 ); face smooth and shiny (Figs 1 B, C View Figure 1 ); malar space with sparse setae (Fig. 1 E View Figure 1 ); scrobes shallowly impressed, smooth (Fig. 1 B View Figure 1 ). Mesosoma. Axillae finely reticulate (Fig. 1 F View Figure 1 ). Mesoscutellum finely strigose associated with indistinct reticulations (Fig. 1 F View Figure 1 ). Propodeum with weak reticulation throughout, with several anteriorly diverging carinae originating from posterior margin (Fig. 2 B View Figure 2 ).

Ratios. Head: w / l (dorsal view) 2.9; w / l (frontal view) 1.3; POL / OOL 1.8; posterior ocellus w / POL 0.6; head w / mss w 1.2; mouth w / MS 0.5; MS / HE 0.7; scape l / HE 0.7; distance toruli to anterior ocellus / toruli to mouth margin 1.4; flg + ped l / mss w 1.3; scape l / w 4.3; F 1 l / w 1.3; F 2 l / w 1.8; F 3 l / w 1.6; clava l / w 4.6; ped l / F 1 l 1.3; F 1 l / F 2 l 0.9; F 1 l / F 3 l 0.9; F 1 l / clava l 0.4; F 2 l / clava l 0.4; F 3 l / clava l 0.4; F 1 w / ped w 1.1; antennal spicule l / C 3 l 0.2. Mesosoma: l / h 1.5; l / w 1.9; midlobe msc l / sct l 1.1; dorsellum l / ppd l 0.5; sct l / w 0.9; CC l / w 13.0; CC l / MV l 0.65; MV l / SV l 5.0; metafemur l / w 4.5; metatibia l / w 6.5. Metasoma: petiole l / w 0.5; gaster l / w 2.0; gaster l / mss l 1.3; Gt 1 l / w 0.6; Gt 5 l / w 1.1.

Colour. Body yellow except eyes and ocelli reddish, antennal clava brownish orange, Gt 2–4 brown.

Material examined.

Holotype • ♀ Thailand, Nakhon Ratchasima, Wang Nam Khiao district, Udom Sap subdistrict, Sakaerat Environmental Research Station , dry evergreen forest, 14°50.911'N, 101°92.963'E, 402 m, 30.vi–12.vii.2021, Malaise trap, coll. K. Chansri (deposited in CUMZ).

Distribution.

Thailand.

Etymology.

The species is named after Dr Christer Hansson, Lund University, Sweden for his outstanding work on Eulophidae .