Thaictenopelma Ranjith, Reshchikov & Quicke, 2024

Ranjith, Avunjikkattu P., Quicke, Donald L. J., Reshchikov, Alexey & Butcher, Buntika A., 2024, A new enigmatic genus of the ichneumonid subfamily Ctenopelmatinae (Hymenoptera, Ichneumonidae) from Thailand, Journal of Hymenoptera Research 97, pp. 491-504 : 491-504

publication ID	https://doi.org/ 10.3897/jhr.97.121436
publication LSID	lsid:zoobank.org:pub:1B48635F-A630-4A27-A22C-4B6BEA2E1D5B
DOI	https://doi.org/10.5281/zenodo.11476580
persistent identifier	https://treatment.plazi.org/id/A8B80B96-E702-4500-BDC4-70CE265EDB20
taxon LSID	lsid:zoobank.org:act:A8B80B96-E702-4500-BDC4-70CE265EDB20
treatment provided by	Journal of Hymenoptera Research by Pensoft
scientific name	Thaictenopelma Ranjith, Reshchikov & Quicke
status	gen. nov.

Treatment

Thaictenopelma Ranjith, Reshchikov & Quicke gen. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5 , see Suppl. material 2

Type species.

Thaictenopelma splendida Ranjith, Reshchikov & Quicke gen. et sp. nov.

Diagnosis.

Thaictenopelma gen. nov. can be separated from all other ctenopelmatine genera by its putatively autapomorphic carination pattern of T 1 and T 2. In particular, the pairs of complete latero-median and dorso-lateral carinae on T 2 are completely unknown for the subfamily ( Townes 1970). Additionally, the new genus can be distinguished from other ctenopelmatines by a combination of characters viz., the lower tooth of mandible being longer than upper tooth, propodeum with distinct carination, fore wing with rhombic areolet, T 2 and T 3 with posteriorly diverging groove basally, and T 3 with distinct medio-basal protuberances.

Description.

Female. Head. Eyes glabrous (Fig. 1 B, C View Figure 1 ). Clypeus flat separated from face only by series of punctures (clypeal groove indistinct to absent), apical margin slightly concave (Fig. 1 B View Figure 1 ). Mandible bidentate, lower tooth longer than upper tooth, the former more acute (Fig. 1 B, C View Figure 1 ). Face with a short protuberance between antennal sockets (Fig. 1 B View Figure 1 ). Malar space short, subocular sulcus absent (Figs 1 B, C View Figure 1 , 2 B View Figure 2 ). Occipital carina complete (Fig. 2 A, B View Figure 2 , Suppl. material 2), joining with hypostomal carina just above base of mandible (Fig. 2 B View Figure 2 ). Ocellar triangle with broad base, anterior ocellus slightly larger than posterior ocellus (Fig. 2 A View Figure 2 ). Frons anteriorly depressed without median sulcus or carina (Fig. 2 A View Figure 2 ). Terminal antennomere acute (Fig. 1 A View Figure 1 ).

Mesosoma. Mesosoma longer than high, setose (Fig. 2 C View Figure 2 ). Epomia absent (Fig. 2 C View Figure 2 ). Mesoscutum closely punctate (Fig. 2 D View Figure 2 ). Notauli slightly impressed anteriorly, largely absent posteriorly (Fig. 2 D View Figure 2 ). Mesopleuron closely punctate, smooth medially including speculum (Fig. 2 C View Figure 2 ). Epicnemial carina extending to half height, not joining anterior margin of mesopleuron (Fig. 2 C View Figure 2 ), complete ventrally (see Suppl. material 2). Scuto-scutellar groove smooth, not divided (Fig. 2 D View Figure 2 ). Scutellum slightly bulged in lateral view, lateral scutellar carina present only anteriorly (Fig. 2 D View Figure 2 ). Metanotum closely punctate medially, with irregular wrinkles laterally (Fig. 2 E View Figure 2 ). Metapleuron punctate, setose, submetapleural carina strong forming distinct lobe anteriorly, juxtacoxal carina absent (Fig. 2 C View Figure 2 ). Posterior transverse carina complete ventrally. Propodeum with distinct carinae, area basalis transverse, area superomedia hexagonal, as long as wide, smooth, area externa transverse, closely punctate, area dentipara subtriangular, closely punctate, setose, area petiolaris hexagonal, smooth, setose, area posteroexterna smooth, setose, anterior and posterior transverse carinae present, complete, pleural and lateral longitudinal carinae present, spiracle oval (Fig. 2 E View Figure 2 ).

Wings. Fore wing with rhombic areolet (Fig. 4 C View Figure 4 ). Vein 2 r & RS originating from the middle of pterostigma (Fig. 4 C View Figure 4 ). Vein 2 m-cu with single, rather wide bulla, joining areolet medially (Fig. 4 C View Figure 4 ). Vein 1 cu-a interstitial and declivous (Fig. 4 C View Figure 4 ). Vein CU originating below middle of first subdiscal cell (Fig. 4 C View Figure 4 ). Hind wing with CU & cu-a receiving distal abscissa of CU at middle (Fig. 4 C View Figure 4 ).

Legs. Fore tibia with acute lobe apically, with short spine on dorsal margin (Fig. 4 A View Figure 4 ). Fore and mid coxae smooth, hind coxa punctate (Figs 1 A View Figure 1 , 3 A View Figure 3 ). Tarsal claw sparsely pectinate to middle (Fig. 4 B View Figure 4 ).

Metasoma. Metasoma coarsely punctate (Figs 2 F View Figure 2 , 3 View Figure 3 ). T 1 setose, transversely, coarsely rugose punctate with dorso-lateral carina (dmc) and latero-median carina (lmc) complete to apex, latero-median carinae with a trace of transverse carina extending laterally at apical 2 / 3 rd, ventro-lateral carina (vlc) present, complete, glymma present basally extending dorsally to join basal depression of tergite (not extending horizontally so that both glymmae are only separated from the dorsal depression by a thin, translucent partition), baso-dorsal depression separated by longitudinal tubercle, posterior margin of T 1 convex medially, spiracle located slightly anterior to mid-length (Figs 2 F View Figure 2 , 3 A, B View Figure 3 ). S 1 present in basal ¼ th, divided from T 1 posteriorly (Fig. 3 A, B View Figure 3 ). T 2 coarsely punctate with dorso-lateral and latero-median carinae with a trace of transverse carina extending laterally at apical 2 / 3 rd, pair of posteriorly diverging grooves present baso-laterally, spiracle situated at basal 1 / 3 rd below lateral longitudinal carina, setose posteriorly (Fig. 3 A, C View Figure 3 ). T 3 punctate to rugose punctate (less coarse than T 2) with posteriorly diverging groove baso-laterally and a pair of protuberances medio-basally, sparsely setose medially and distinctly setose posteriolry (Fig. 3 C View Figure 3 ). T 4–7 closely punctate (less coarse than T 3) without carinae, setose (Fig. 3 A, C View Figure 3 ). Ovipositor sheath setose (Fig. 3 A View Figure 3 ). Ovipositor with distinct dorsal notch, without dorsal nodus dorso-apically (Fig. 3 A View Figure 3 , Suppl. material 2).