Pyracmon monticola, Watanabe, 2019

Watanabe, Kyohei, 2019, Revision of the Genus Pyracmon (Insecta: Hymenoptera: Ichneumonidae) from Japan, with Description of a New Species, Species Diversity 24, pp. 281-285 : 283-285

Pyracmon monticola sp. nov.

[New standard Japanese name: Miyama-chibi-amebachi] ( Figs 1–5 , 12–18 )

Type series. Holotype: KPM-NK 74578, female, JAPAN, Nagano Pref., Outaki Vil., Mt. Ontakesan, Hakkaisan , 6. VIII. 2010, K. Watanabe leg. Paratypes: JAPAN: KPM-NK 74582, 1 female, Hokkaido, Sapporo City, Mt . Maruyama, 29 . VII . 2009, K . Watanabe leg .; KPM-NK 74580, 74581, 2

females, Hokkaido, Sapporo City, Nopporo forest park, 9 . VII . 2012, M . Ito leg .; KPM-NK 74579, 1 female, same locality of holotype, 18–20 . VIII . 2014, S . Shimizu leg . (Malaise trap); KPM-NK 74583, 1 female, Kanagawa Pref., Hadano City, Mt. Koubouyama, 5 . IV . 2007, K . Watanabe leg .

Description. Female (n=6). Body length 6.5–7.5 (HT: 7.5) mm, slender, mat and inpunctate, covered with silver setae.

Head 0.6×as long as wide. Area combined clypeus with face narrow ( Fig. 12 ), 1.0 as long as wide, slightly convex in lateral view. Apical margin of clypeus blunt, with a pair of lateral margined area and a median weak, smooth convexity ( Fig. 15 ). Gena broadly rounded in dorsal view, distinctly receding ( Fig. 13 ). Malar space 0.8×as long as basal mandibular width. Lower part of occipital carina joined with hypostomal carina. Mandible narrow, slightly tapering distally, lower margin with narrow lamella ( Fig. 14 ). POL 1.2–1.4 (HT: 1.4)×as long as OD. OOL 1.2–1.4 (HT: 1.4)×as long as OD. Antenna with 33–34 (HT: 34) flagellomeres. Length of FL I 4.5×as long as maximum depth. FL I: II: III=2.0: 1.4: 1.3.

Mesosoma. Pronotum covered with longitudinal striae on ventral 0.6 ( Fig. 2 ). Epomia present. Notauli absent. Epicnemial carina complete, its dorsal end joined with anterior margin of mesopleuron. Mesopleuron without smooth area, speculum reticulate coriaceous. Propodeal carinae as in Figs 3 , 16 . Lateral longitudinal carina partly obscured ( Fig. 16 ). Lateromedian longitudinal carina partly absent. Area petiolaris with some transverse rugae ( Figs 3 , 16 ). Fore wing length 5.5–6.1 (HT: 6.1) mm. Wing venation as in Figs 4, 5 . Postero-distal corner of second discoidal cell in form an acute to right angle (85–90°). Areolet sessile or shortly stalked, receiving second recurrent vein at the middle ( Fig. 4 ). Hind wing with unpigmented discoidella ( Fig. 5 ), clearly recognizable by light reflection. Hind femur 5.1–5.4 (HT: 5.4)×as long as maximum depth in lateral view. Hind tibia covered with minute (normal) setae, its dorsal surface with some short bristles. Longest spur of hind tibia about half length of first tarsomere. TS I without a continuous, straight, median ventral row if very closely spaced small setae. TS I: II: III: VI: V=4.5–4.8 (HT: 4.8): 2.0: 1.3–1.5 (HT: 1.5):0.7–0.8 (HT: 0.8): 1.0.

Metasoma. T I 2.7–3.0 (HT: 2.9)×as long as maximum width, its base smooth. T I in profile dorsally without an obtuse angulation ( Fig. 17 ). Subapical part of lower valve of ovipositor weakly widened ( Fig. 18 ). Ovipositor sheath 1.4×as long as hind tibia.

Coloration ( Figs 1–5 ). Body (excluding wings and legs) black to blackish brown, except for: mandible except apex, palpi and tegula yellow; membranous part of metasomal sternites and posterior margin of metasomal tergites (usually T IV to T VII but very narrow) yellowish brown; ovipositor reddish brown. Wings hyaline. Veins and pterostigma blackish brown to brown except for yellowish brown to yellow wing base. Fore and mid legs reddish brown to yellowish brown except for: coxae largely black; trochanters and trochantelli yellow. Hind leg blackish brown to black except for: trochantellus yellow; base and apex of femur narrowly tinged with yellowish brown; median part of tibia and tibial spurs yellowish brown.

Male. Unknown.

Distribution. Japan (Hokkaido and Honshu).

Bionomics. Unknown.

Etymology. The specific name is from latin “ monticola ”. The holotype of this species collected in mountain (ca. 1720–1820 m alt.) in Honshu.

Remarks. This species resembles P. sepiellus in the front wing with postero-distal corner of second discoidal cell in form an acute angle (ca. 85–90°) and the coloration of hind tibia but can be easily distinguished from P. sepiellus by the apical margin of clypeus with a pair of lateral margined areas and a median weak, smooth convexity (simply arched in P. sepiellus ) and the propodeal carinae partly obscured (complete and strong in P. sepiellus ).

Pyracmon nigrifemur Barron and Walley, 1983 [Standard Japanese name: Ashiguro-chibi-amebachi] ( Figs 6–8 , 19–23 )

Pyracmon nigrifemur Barron and Walley, 1983: 232 .

Description. Female (n=6). Body 7.0– 8.5 mm, slender, mat and inpunctate, covered with silver setae.

Head 0.55–0.6×as long as wide. Area combined clypeus with face wide ( Fig. 19 ), 0.8 as long as wide, slightly convex in lateral view. Apical margin of clypeus blunt, simply arched, without margined areas and a median smooth convexity ( Fig. 21 ). Gena broadly rounded in dorsal view, slightly receding. Malar space 0.75–0.8×as long as basal mandibular width. Lower part of occipital carina joined with hypostomal carina. Mandible relatively broad, short, tapering distally, lower margin with narrow lamella ( Fig. 20 ). POL 1.4–1.5×as long as OD. OOL 1.4–1.6×as long as OD. Antenna with 26–29 flagellomeres. Length of FL I 4.5×as long as maximum depth. FL I: II: III=2.0: 1.45–1.6: 1.3–1.45.

Mesosoma. Pronotum covered with longitudinal striae on ventral 0.2 ( Fig. 7 ). Epomia present but short. Notauli slightly present anteriorly. Epicnemial carina complete, its dorsal end joined with anterior margin of mesopleuron. Mesopleuron with a large smooth area on speculum and usually with a longitudinal rugulose area between epicnemial carina and speculum ( Fig. 7 ). Propodeal carinae strong and complete, as in Figs 8 , 22 . Lateromedian longitudinal carina and lateral longitudinal carina complete. Area petiolaris without ( Figs 8 , 22 ) or with a few transverse rugae, sometimes covered with irregular rugae laterally. Fore wing length 5.4–6.7 mm. Fore wing with angle of postero-distal corner of second discoidal cell acute (ca. 80°). Areolet sessile, receiving second recurrent vein at or little distad of the middle. Hind wing with slightly pigmented discoidella ( Fig. 7 ). Hind femur 4.5–5.0×as long as maximum depth in lateral view. Hind tibia covered with minute (normal) setae, its dorsal surface with some short bristles. Longest spur of hind tibia shorter than half length of first tarsomere. TS I without a continuous, straight, median ventral row if very closely spaced small setae. TS I: II: III: VI: V=4.7–4.8: 2.0: 1.2–1.3: 0.8–0.9: 1.0–1.2.

Metasoma. T I 2.8×as long as maximum width, its base smooth. T I in profile dorsally with an obtuse angulation ( Fig. 23 ). Subapical part of lower valve of ovipositor not distinctly widened. Ovipositor sheath 0.95–1.0×as long as hind tibia.

Coloration ( Figs 6–8 ). Body and legs (excluding wings) black to blackish brown; fore femur, tibia and tarsus, tibial spurs of all legs, membranous part of metasomal sternites and ovipositor dark brown; apex of ovipositor sheath yellowish brown. Wings hyaline. Veins and pterostigma blackish brown to brown except for yellowish brown wing base.

Male. No additional specimen collected from Japan is available.

Specimens examined. JAPAN: KPM-NK 74575, 74576, 2 females, Gunma Pref ., Katashina Vil., Mt . Hotakasan, 2 . VIII . 2007, K . Watanabe leg .; KPM-NK 74577, 1 female, Niigata Pref . , Myoukou City , Suginosawa, Mt. Sasagamine, 17 . VIII . 2013, S . Shimizu leg .; AEIC, 1 female (holotype), Nagano Pref ., Kamikochi , 26 . VII . 1954, Townes family leg.; NIAES, 1 female, Nagano Pref ., Shimashimadani , 28 . VII . 1980, H . Takemoto leg .; NIAES, 1 female, Oita Pref ., Mt. Sobo, 20–24 . VII . 1980, K . Konishi leg .

Distribution. Japan (Honshu and Kyushu).

Bionomics. Unknown.

Remarks. This is the first record of this species from Kyushu.

Figures

Figs 1–11. Japanese species of Pyracmon, P. monticola sp. nov. (1–5, holotype, KPM-NK 74578), P. nigrifemur Barron and Walley, 1983 (6–8, KPM-NK 74575) and P. sepiellus (Holmgren, 1860) (9–11, NIAES), females from Japan—1, 6, 9, lateral habitus; 2, 7, 10, mesosoma, lateral view; 3, 8, 11, propodeum, dorsal view; 4, right fore wing; 5, right hind wing.

Figs 12–27. Japanese species of Pyracmon, P. monticola sp. nov. (12–18, holotype, KPM-NK 74578), P. nigrifemur Barron and Walley, 1983 (19–23, KPM-NK 74575) and P. sepiellus (Holmgren, 1860) (24–27, NIAES), females from Japan—12, 13, 19, 24, head, frontal (12, 19, 24) and dorsal (13) view; 14, 20, right (14) and left (20) mandible, frontal view; 15, 21, 25, apical margin of clypeus, frontal view; 16, 22, 26, propodeum, dorsal view, rugae on right half omitted; 17, 23, 27, T I and basal part of T II, lateral view; 18, apex of ovipositor, lateral view.