Aptesis flavitrochanterus, Watanabe & Taniwaki, 2018

Watanabe, Kyohei & Taniwaki, Tooru, 2018, Taxonomic Study of the Genera Förster, 1850, and Cameron, 1903 (Hymenoptera, Ichneumonidae, Cryptinae) associated with (Hymenoptera, Tenthredinidae), with Description of a New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 47, pp. 73-84 : 76-79

publication ID	https://doi.org/ 10.5281/zenodo.13222915
publication LSID	lsid:zoobank.org:pub:BCB7842F-9D35-4765-9B39-9803D3B4ADE5
persistent identifier	https://treatment.plazi.org/id/E0579B02-C924-407B-AF98-31DF812E25CD
taxon LSID	lsid:zoobank.org:act:E0579B02-C924-407B-AF98-31DF812E25CD
treatment provided by	Felipe
scientific name	Aptesis flavitrochanterus
status	sp. nov.

Treatment

Aptesis flavitrochanterus sp. nov.

( Figs 1A–F View Fig , 2A–C View Fig , 3A–F View Fig )

Aptesis sp. A Taniwaki & Watanabe, 2012: 6.

Type series. [Holotype] F, Kanagawa Pref., Kiyokawa Vil., Miyagase, Mt. Tanzawasan, Tennoji-one 1350 m alt., 24. XII. 2008 (coll. cocoon of Fagineura crenativora ), 23. II. 2009 (em. from the cocoon), T. Taniwaki leg. ( KPM-NK 5006655 ). [Paratypes] 1 M, same data of holotype except for 19. II. 2009 (em. from the cocoon) ( KPM-NK 5006658 ); 2 M, same data of holotype except for 19. XI. 2008 (coll.), 16. II. 2009 (em. from the cocoon) ( KPM-NK 5006659 , 5006660 ); 1 F, same data of holotype except for 9. II. 2008 (coll.), 18. III. 2009 (em. from the cocoon) ( KPM-NK 5006661 ); 1 F 2 M, same data of holotype except for 23. IV. 2008 (coll.), 4 (M), 18 (M), 24 (F). V . 2009 (em. from the cocoon) ( KPM-NK 5006662–64 ); 1 F, same locality and collector of holotype, 16. III. 2009 (coll. cocoon of Fagineura crenativora ), 19. IV. 2009 (em. from the cocoon), T . Taniwaki leg. ( KPM-NK 5006665 ); 1 F, same locality and collector of holotype, 30. IV. 2009 (coll. cocoon of Fagineura crenativora ), 3. V . 2009 (em. from the cocoon) ( KPM-NK 5006666 ); 1 M, same locality and collector of holotype, 8. IV. 2009 (coll. cocoon of Fagineura crenativora ), 3. V. 2009 (em. from the cocoon) ( KPM-NK 5006666 ); 1 F, same locality and collector of holotype, 8. IV. 2009 (coll. cocoon of Fagineura crenativora ), 8. V . 2009 (em. from the cocoon) ( KPM-NK 5006669 ); 1 M, same locality and collector of holotype, 30. IV. 2009 (coll. cocoon of Fagineura crenativora ), 20. V . 2009 (em. from the cocoon) ( KPM-NK 5006670 ); 1 F , Kanagawa Pref., Kiyokawa Vil., Miyagase, Mt. Tanzawasan , Tennoji-one 1350 m alt., 16. V . 2013, T . Taniwaki leg. ( FIT) ( KPM-NK 5004398 ); 1 F, same locality and collector, 31. V . 2013 ( KPM-NK 5004333 ); 2 F, same locality and collector, 15. VI . 2013 ( KPM-NK 5004320 , 5004327 ); 1 F, same locality and collector, 20. VI . 2013 ( KPM-NK 5004321 ); 1 F , Kanagawa Pref., Kiyokawa Vil., Miyagase, Mt. Tanzawasan 1550 m alt., 9. V . 2013, T . Taniwaki leg. ( FIT) ( KPM-NK 5004319 ); 3 F, same locality and collector, 15. VI . 2013 ( KPM-NK 5004324 , 5004329 , 5004423 ); 2 F, same locality and collector, 20. VI . 2013 ( KPM-NK 5004328 , 5004330 ); 1 F, same locality and collector, 4. VII. 2013 ( KPM-NK 5004323 ); 1 M , Kanagawa Pref., Yamakita Town, Kurokura, Mt. Hinokiboramaru 1550 m alt., 6. II. 2008 (coll. cocoon of Fagineura crenativora ), 11. III. 2009 (em. from the cocoon), T . Taniwaki leg. ( KPM-NK 5006671 ); 1 F, same locality, 21. V . 2013, T . Taniwaki leg. ( FIT) ( KPM-NK 5004332 ); 1 F, same locality and collector, 28. VI . 2013 ( KPM-NK 5004322 ); 1 F, same locality and collector, 6. VII. 2013 ( KPM-NK 5004331 ); 1 F , Kanagawa Pref., Yamakita Town, Nakagawa, Mt. Komotsurushiyama 1350 m alt., 21. VI . 2013, Taniwaki leg. ( FIT) ( KPM-NK 5004325 ); 1 F , Kanagawa Pref., Yamakita Town, Yoduku, Mt. Mikuniyama 1350 m alt., 21. VI . 2013, Taniwaki leg. ( FIT) ( KPM-NK 5004326 ); 1 F, same locality and collector, 4. VII. 2013 ( KPM-NK 5004385 ); 1 F , Yamanashi Pref., Koushu City, Mt. Daibosatsu , Kaminikkawa-toge, 16. VI . 2007, H. Katahira leg. ( KPM-NK 5006673 ); 1 F , Nagano Pref., Outaki Vil., Mt. Ontakesan, Tanohara 1800 m alt., 8. VIII. 2007, K. Watanabe leg. ( KPM-NK 5006674 ) .

Description. Female (n = 25). Body length 3.5–5.5 (HT: 5.3) mm. Body polished, smooth and punctate, covered with silver setae.

Head 0.6–0.65 (HT: 0.65) times as long as wide. Clypeus 0.45–0.5 (HT: 0.45) times as long as wide, punctures on ventral area sparser than dorsal area ( Fig. 1B View Fig ). Face 0.4 times as long as wide, weakly convex medially, interspace of punctures mat ( Fig. 1B View Fig ). OOL 0.9–2.0 (usually 1.0, HT: 1.0) times as long as POL. Occipital carina complete, its lower end connected with hypostomal carina distant from base of mandible. MSL 1.2–1.4 (HT: 1.2) times as long as BWM. Subocular sulcus absent. Malar space with a distinct mat area. Antenna with 19–21 (HT: 20) flagellomeres. F1 1.0–1.05 (HT: 1.05) times as long as F2. F2 1.7–2.0 (HT: 2.0) times as long as maximum depth in lateral view.

Mesosoma. Pronotum punctate, obliquely or longitudinally striated ventrally ( Fig. 3A View Fig ). Epomia present but weak ( Fig. 3A View Fig ). Mesonotum punctate, punctures on median part larger than other areas, with distinct, short notauli ( Figs 1C View Fig , 3A View Fig ). Mesopleuron without a large smooth area around episternal scrobe, its punctures partly longitudinally or obliquely confluent each other. Upper end of epicnemial carina not reached to anterior margin of mesopleuron ( Fig. 3A View Fig ). Subalar prominence convex. Lower division of metapleuron with a juxtacoxal carina, its posterior end sometimes indistinct. Lateromedian longitudinal carinae and anterior transverse carina of propodeum absent or partly indistinctly present ( Fig. 3E View Fig ). Posterior transverse carina of propodeum and pleural carinae complete ( Fig. 3E View Fig ). Areas along posterior transverse carina of propodeum usually some longitudinal or irregular rugae ( Fig. 3E View Fig ). Propodeal apophysis developed but weak ( Fig. 1A View Fig ). Fore wing 3.6–4.8 (HT: 4.1) mm, without a ramulus. Anterior end of vein cu-a of fore wing opposite or almost opposite to posterior end of vein Rs+M. Lateral sides of areolet convergent anteriorly ( Fig. 3C View Fig ). Vein 1-cu of hind wing more than 6.0 times as long as vein cu-a of hind wing. Hind femur 3.8–4.1 (HT: 4.1) times as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma. T1 1.4–1.85 (HT: 1.85) times as long as maximum width, largely smooth, without median dorsal carinae, with dorsolateral carinae except for apex ( Figs 1F View Fig , 3D, E View Fig ). T2 1.1–1.4 (HT: 1.3) times as long as maximum width. T2 and T3 covered with fine punctures except for median large smooth area ( Fig. 1F View Fig ). T4–T7 finely and sparsely punctate. Ovipositor sheath longer than T1 and 0.9–1.0 (HT: 1.0) times as long as hind tibia, its base sometimes concealed under tergites and thus measurement difficult in this case. Apex of ovipositor as Fig. 3F View Fig .

Colouration ( Figs 1 View Fig A-F). Body (excluding wings and legs) black to blackish brown, except for: palpi dark brown, flagellum with a white band (usually present on F6–F10) and a ventral reddish-brown surface on apical segments, mandible and clypeus more or less partly tinged with reddish-brown, inner orbit sometimes with a pair of reddish-brown markings along antennal sockets, tegula sometimes tinged with brown, T2–T7 sometimes tinged with brown, and ovipositor reddish-brown. Wings hyaline, with dark brown to blackish-brown veins and pterostigma except for yellow wing base. Legs black to blackish brown, except for: trochanters and trochanteli white to whitish-yellow (sometimes more or less darkened), fore and mid tibiae and tarsi largely yellowish-brown, apex and base of femora narrowly tinged with yellowish-brown, coxae and basal part of hind tibia sometimes tinged with yellowish-brown.

Male (n = 9). Similar to female. Body length 5.5–7.1 mm. Clypeus 0.4–0.5 times as long as wide. Face 0.45–0.5 times as long as wide. OOL 1.3–1.8 times as long as POL. MSL 0.6–0.7 times as long as BWM. Antenna with 25–27 flagellomeres. F2 2.0–2.2 times as long as maximum depth in lateral view, with tyloids on F11-14 (sometimes also F10 and F15) ( Fig. 2C View Fig ). Fore wing 4.7–5.8 mm. Hind femur 4.4–4.5 times as long as maximum width in lateral view. T1 2.35–2.8 times as long as maximum width. T2 0.75–1.2 times as long as maximum width. T2–T7 entirely covered with punctures. Apex of paramere beyond the apex of aedeagus. Face whitish yellow except for a small median black area below antennal sockets ( Fig. 2B View Fig ). Antenna without a white band and usually without a ventral reddish-brown area ( Fig. 2A View Fig ). Clypeus, malar space, ventral surface of scape, and apex of pedicel whitish yellow ( Fig. 2B View Fig ). Tegula tinged with whitish-yellow laterally ( Fig. 2A View Fig ). Thyridium and posterior margin of T2 reddish-brown. Fore and mid legs usually paler than female ( Fig. 2A View Fig ).

Egg. White, elongate, its length ca. 1.0 mm ( Taniwaki & Watanabe, 2014).

Distribution. Japan (Honshu).

Etymology. The specific name is from the white trochanter of hind leg.

Bionomics. Host is Fagineura crenativora (common species of parasitoid complex of the sawfly) ( Taniwaki & Watanabe, 2012, 2014). Adult emerged from host cocoon ( Taniwaki & Watanabe, 2012, 2014). The ovipositor behaviour was reported by Taniwaki & Watanabe, i.e., 1) adult female initially dug into the soil to search for cocoons of their host, 2) on the detection of cocoons, they laid their eggs inside the cocoon, 3) the eggs can be easily dropped from the body of host inside cocoons.

Remarks. This species resembles A. melana and A. opaca , but its females can be distinguished by the following combination of character states: hind trochanter and trochantellus largely white to yellow (black to brown in A. melana and A. opaca ); T1 1.4–1.85 times as long as maximum width (1.3 times in A. melana ); body length 3.5–5.5 mm (8.5–10.0 mm in A. opaca ); ovipositor sheath longer than T1 and 0.9–1.0 times as long as hind tibia (shorter than T 1 in A. opaca and 0.8 times as long as hind tibia in A. melana ). The males of this species can be distinguished from other Japanese species and A. melana by the following combination of characters: face entirely yellow to white except for median dorsal area (black in A. albibasalis ); clypeus entirely yellow to white; tyloids of antenna present on F10–F15 (F 13–19 in A. albibasalis ); hind tarsus blackish-brown to black (with a yellowish-brown to white area in A. opaca , A. albidipes and A. melana ).