Tenthredo chanae Taeger & Shinohara

Taeger, Andreas, 2013, The type specimens of Tenthredo Linnaeus, 1758 (Hymenoptera: Tenthredinidae) deposited in the Hungarian Natural History Museum, Zootaxa 3626 (2), pp. 201-244 : 237-239

Tenthredo chanae Taeger & Shinohara sp. n.

urn:lsid:zoobank.org:act:E3F29B55-34ED-4F9A-83BB-BA8559FC53FE

Tenthredo concinna: Togashi (1972) , Chou & Naito (1991), misident.

DESCRIPTION. Female ( Figs 43, 44 ). Length 12–14 mm. Colour. Black with rich yellow pattern, the abdomen with a weak metallic blue or violet tinge. Antenna black with oblique yellow ring, reaching ventrally from the apex of antennomere 3 to about the middle of antennomere 5, dorsally from the middle of antennomere 4 to the end of antennomere 5; occasionally, the ring is reduced, as the 4th antennomere may become nearly completely black dorsally and the 5th antennomere may become nearly completely black ventrally. Head mainly yellow, front margin and median line of the clypeus and a more or less broad area between the tentorial pits black; frontal and postocellar area largely black, the black touching the upper corners of the eyes; gena with broad black stripe reaching from occipital carina to the eye and connected with the frontal patch by a narrow line along the upper eye margin, occiput mainly black; antennal crests yellow spotted, hind margin of postocellar area with 2–3 (sometimes confluent) yellow spots. Thorax black, yellow are: upper and lower corners of pronotum, tegulae, a large V-like mark on the median mesoscutal lobe, meso- and metascutellum, a large spot on anterior upper mesepisternum, a smaller spot on posterior upper mesepisternum, a large spot on metepisternum. All coxae yellow, basally black; front legs anteriorly yellow, posteriorly mainly black; middle femur black, more or less yellow marked anteriorly, middle tibia yellow, basal and apical quarter posteriorly black, tarsus of middle leg yellow, tarsomeres more or less darkened basally and apically; hind leg similar to middle leg, but femur and apical quarter of tibia completely black, the basal black colour of the hind tibia only about half as long as the apical one, and tarsi more yellow than middle tarsi. Wings hyaline, about the apical third of front wings slightly infumate; veins dark brown, pterostigma dark brown, basally pale. Abdomen black, tergum 1 yellow except for its anterior margin, terga 2–6 with large yellow lateral patches, sometimes confluent at the posterior margins of terga 2–4; sterna 2–6 mainly yellow.

Head. Antenna long, about as long as costa and pterostigma together, compressed laterally, from 5th onwards nearly twice as high as broad in dorsal view. Antennomeres 3: 4: 5 about as 1.0: 0.8–0.9: 0.7–0.8; 8th antennomere in lateral view 2.7–3.3 times as long as broad; frontal crests strongly developed, free standing; antennal and postocellar furrows deep; postocellar area about 1.1–1.2 times as broad as long; postocellar line about as long as diameter of ocellus; ocular-ocellar line about 1.5 times as long as ocellar-occipital carina line; in dorsal view temples narrowed, about 0.6–0.8 times as long as eyes; clypeus semicircularly emarginate to about one third of its length; labrum apically rounded; malar space about as long as diameter of the median ocellus; head with minute shallow pits, strongly shiny, malar space matt. Thorax dorsally and on mesepisternum densely sculptured, rather matt, with fine scattered pits and semiopaque surface between the pits owing to dense microsculpture; mesepisternum at its most elevated point with rugose impression; posterior part of mesoscutellum and scutellar appendage with strong, isolated pits. Abdomen shiny, with shallow microsculpture; hind margin of the hypopygium emarginate in the middle; saw with about 23 annuli ( Fig. 44 ).

Male ( Figs 45, 46 ). Length 12–13 mm. Similar to the female, but the pale colour is more extensive: clypeus yellow, the black of the frontal area may not touch the upper corners of the eyes, dark spot on gena strongly reduced; middle legs anteriorly yellow; terga 2–6 only with faintly indicated dark median line or completely yellow except for the anterior margins. Penis valve Fig. 46 a.

DISTRIBUTION. Taiwan.

TYPES. Holotype, Ƥ “ Taiwan Nantou Meifeng VII/18 – VIII/6/2001 C.S.Lin & W.T.Yang Malaise trap (KCN)” [24.10000 N, 121.16666 E],“NMNS-ENT 6014-2036” (DEI-GISHym 18634). Deposited in NMNS. The holotype is figured on Fig. 43 .

Paratypes (18 Ƥ, 3 33, deposited in TARI, NSMT, SDEI). 1 Ƥ Meifeng, 2150 m, 20–22.VI.1979, leg. K.S.

Lin & B.H. Chen ( Fig. 44 ); 1 Ƥ Meifeng, 2130 m, 17–22.VII.1979, Malaise trap; 1 Ƥ Meifeng, 2150 m, 8–11.V.1984, leg. K.C. Chou & C.C. Pan; 1 Ƥ Meifeng, 2150 m, VI.1984, Malaise trap, leg. K.S. Lin & K.C. Chou; 2 Ƥ Meifeng, 2150 m, VII.1984, Malaise trap, leg. K.S. Lin & K.C. Chou; 2 Ƥ Meifeng, 2150 m, VIII.1984, Malaise trap, leg. K.S. Lin & K.C. Chou; 1 Ƥ Tsuifeng, 2300 m [24.10900 N, 121.19800 E], VI.1984, Malaise trap, leg. K.S. Lin & K.C. Chou; 3 Ƥ Alishan, 2400 m [23.44000 N, 120.78000 E], 5–9.VIII.1981, leg. L.Y. Chou & S.C. Lin; 2 Ƥ 1 3 ( Fig. 46 ) Mt. Alishan, 2200 m, 23.V.1981, leg. Y. Tagawa; 1 3 Mt. Alishan, 2200 m, 23.V.1981, leg. K. Sasagawa ( Fig. 45 ); 1 Ƥ Mt. Alishan, 2.VIII.1981, leg. K. Matsuda; 2 Ƥ Arisan, 27.V.1929, leg. K. Sato; 1 Ƥ Rantaizan, 20.V.1928, leg. J. Sonan; 1 3 Mt. Lalashan [24.70500 N, 121.41300 E], 2.V.1981, leg. S. Tsuyuki.

ETYMOLOGY. This species is dedicated to our colleague and friend Dr Mei-Ling Chan (NMNS,Taichung) in cordial thanks for organizing a successful long-term cooperation between the NMNS and the SDEI and for her kind hospitality during the visit of AT to Taiwan in 2011.

DISCUSSION. The new species is described in the present study because it is similar to Tenthredo concinna (see above). The taxon from Taiwan runs smoothly in the key of Saini (2007) to T. concinna Mocsáry, 1883 , and in the key of Malaise (1945) to T. concinnoides Malaise, 1945 (= concinna , see above). T. concinna is not known from Taiwan; former records from Taiwan refer to T. chanae . Apart from its distribution, chanae can be easily distinguished from concinna as follows (character states of concinna in parentheses):

—hind tibia basally black (basally yellow)

—basal half of 4th antennomere black dorsally (mainly or completely yellow)

—in female yellow mesepisternal spot dissolved in two spots (one large spot)

—mesepisternum at its most elevated point with rugose impression (without rugose impression)

—frontal crests strong developed, separated from frontal area by a deep furrow (frontal crests less developed,

nearly fading out in direction to frontal area, separated only by a shallow furrow)

—serrulae of the saw prominent (less prominent in concinna , Fig. 12 )

Tenthredo gressitti Malaise, 1945 , from Taiwan also resembles T. chanae as its antenna is also pale marked on 3rd to 5th antennomeres, and the frontal crests are well developed. But several characters separate it clearly from chanae , e.g., gressitti has a different yellow colour pattern of the head, thorax and abdomen, the antennae completely dark on their outer side, pterostigma black, hind legs nearly completely yellow, temples reddish brown and in dorsal view not distinctly narrowed, mesepisternum at its most elevated point with only faintly indicated rugose impression.

Figures

FIGURE 43 – 44. 43. Tenthredo chanae sp. nov., holotype Ƥ. a. dorsal, scale 5 mm; b. lateral; c. head and thorax dorsal; d. face; e. labels. 44. Saw and detail of 10 th serrula of a paratype from the type locality.

FIGURE 45 – 46. 45. Tenthredo chanae sp. nov., pale paratype 3. a. dorsal, scale 5 mm; b. lateral; c. head dorsal; d. face. 46. Tenthredo chanae sp. nov., dark paratype 3. a. head dorsal; b. penis valve.

FIGURES 11 – 12. Tenthredo concinna, Ƥ specimens from Yunnan. 11. sculpture of the mesonotum: a. similar to the lectotype of concinna; b., c. intermediate forms; d. similar to the lectotype of concinnoides. 12. 10 th serrula of saw from apex.