Caliroa aizankei Hara, 2020

Hara, Hideho & Ibuki, Shinichi, 2020, Caliroa slug sawflies of Japan (Hymenoptera, Tenthredinidae), Zootaxa 4768 (3), pp. 301-333 : 321-322

Caliroa aizankei Hara sp. nov.

( Figs 2E, F , 3I, T , 4M , 5I , 9A, B )

Description: female (holotype). Length 4.5 mm. Black, shiny with colorless reflection ( Fig. 2E, F ). Labrum dark brown. Mandible black, apically reddish brown. Palpi yellow brown, basally darkened. Legs black; femora narrowly brownish apically; fore and middle tibiae yellowish white; hind tibia yellowish white on basal half; tarsi yellowish white, slightly darkened apically; tibial spurs and claws yellow brown. Wings brown, becoming pale on apical third; veins and stigma brown to black.

Postocellar area 1.5 × as wide as length behind lateral ocellus, without anterior groove. Clypeus emarginated ventrally ( Fig. 3I ); depth of emargination 0.2 × median length of clypeus. Malar space narrower than facet of eye, without setae. First flagellomere 0.8 × as long as second and third flagellomeres combined ( Fig. 3T ); apical four flagellomeres combined 1.4 × as long as first flagellomere. Forewing with joint of vein Rs and crossvein 2r-rs located at apical 0.4 of anterior margin of cell 1Rs2 ( Fig. 2E ); basal corner of cell 1M acute. Hind wing with joint of vein 1A and crossvein cu-a located apical to apex of cell 1A ( Fig. 4M ); crossveins 2r-m and m-cu absent.

Punctures generally minute. Head and thorax mostly smooth between punctures. Mesoscutellum posterolaterally with several relatively large punctures along posterior margin ( Fig. 5I ). Mesoscutellar appendage mostly with setigerous punctures. Dorsum of abdomen very slightly microsculptured.

Lance ( Fig. 9A ) with dorsal margin very slightly serrate apically. Lancet ( Fig. 9A, B ) with 14 serrulae; ctenidia pale, ventrally extending to level of base of serrula; middle serrulae about as deep as wide, with some anterior and posterior teeth [serrulae in Fig. 9A, B are probably severely worn]; areas between middle serrulae slightly or moderately convex, slightly wider than adjacent serrula.

Male. Unknown.

Material examined. Holotype ( Figs 2E, F , 3I, T , 4M , 5I , 9A, B ): ♀, “[Hokkaido] Aizankei, Mt. Daisetsu , 29. vii. 1955, Col. K. Morimoto ”.

Etymology. The species epithet is named after the locality and is a noun in apposition.

Distribution. Japan: Hokkaido.

Remarks. Among eastern Palearctic and Oriental species, Caliroa aizankei is similar to C. staphyleae and part of C. vaccini in having the combination of a black body with colorless reflection, a pale marked hind tibia and basally dark and apically transparent wings and a female hind wing with the joint of a vein 1A and a crossvein cu-a located apical to the apex of a cell 1A. These three species are distinguished as stated under the key above.

In the key to western Palearctic species by Lacourt (2002), C. aizankei goes to the couplet 6, but does not agree with either line of the couplet.

In the key to Nearctic species by Smith (1971), C. aizankei goes to the couplet 6 consisting of C. distincta Smith, 1971 and C. lunata MacGillivray, 1909 , but it is distinguished from them by apical four flagellomeres combined 1.4 × as long as a first flagellomere [subequal in length in the latter two] and a lancet with 14 serrulae [16 to 17 serrulae in C. distincta ; 17 to 19 serrulae in C. lunata ].

Figures

FIGURE 2. Female adults. A, B, Caliroa vaccini, paratype. C, D, C. ouensis, holotype. E, F, C. aizankei, holotype. G–J, C. staphyleae: G, H, lectotype of C. staphyleae; I, J, holotype or paratype of C. staphylea. K–P, C. zelkovae: K, L, lectotype of C. zelkovae; M, N, holotype of C. zelkova; O, P, Nakagawa, host Prunus domestica. Q, R, C. nire, holotype.A, C, E, G, I, K, M, O, Q, dorsal or dorsolateral view. B, D, F, H, J, L, N, P, R, ventral or ventrolateral view.

FIGURE 3. Heads (A–M), antennae (N–W) and hind tarsus (X). A, K, L, V, Caliroa zelkovae: A, K, female, Nakagawa, host Ulmus davidiana var. japonica; L, V, female, lectotype. B–D, N, X, C. cerasi, female: B–D, N, Shimizu; X, Sapporo. E, O, C. bibaiensis, female, holotype. F, P, C. oishii, female, holotype or paratopotype. G, Q, C. ibukii, female, holotype. H, R, C. vaccini, female, paratype. S, C. ouensis, female, holotype. I, T, C. aizankei, female, holotype. J, U, C. staphyleae, female: J, paralectotype; U, lectotype. M, W, C. nire, female, holotype. A, B, dorsal view. C, anterolateral view. D–M, frontal view. N–W, inner or outer lateral view. X, anteroventral view. P, Q, U, X, reversed.

FIGURE 4. Hind wings, dorsal view. A–C, Caliroa cerasi: A, female, Sapporo; B, female, Shimizu; C, male, Finland. D, C. bibaiensis, female, holotype. E, F, C. oishii: E, female, holotype or paratopotype; F, male, Shintoku. G, H, C. ibukii: G, female, holotype; H, male, paratype. I–K, C. vaccini: I, female, paratype; J, female, holotype or paratype; K, male, paratype. L, C. ouensis, female, holotype. M, C. aizankei, female, holotype. N–P, C. staphyleae: N, female, lectotype; O, female, Nakagawa; P, male, paralectotype. Q, R, C. zelkovae: Q, female, lectotype; R, male, Hobara. S, C. matsumotonis, male, Korea. T, C. nire, female, holotype. A, C, D, F, J, K, reversed.

FIGURE 5. Mesoscutellar appendages and adjacent areas, dorsolateral view (A–M) and first to third abdominal terga, dorsolateral view (N–P). A, N, Caliroa cerasi, female: A, Shimizu; N, Sapporo. B, O, C. bibaiensis, female: B, paratype; O, holotype. C, C. oishii, female, Mikasa. D, C. ibukii, female, holotype. E, C. vaccini, female, paratype. F, C. ouensis, female, paratype, Mt. Zao-san. G, C. annulipes, female, Austria. H, C. nara, female, Kamikawa. I, C. aizankei, female, holotype. J, C. staphyleae, female, lectotype. K, C. zelkovae, female, lectotype. L, C. matsumotonis, female, lectotype. M, P, C. nire, female, holotype.

FIGURE 9. Lances and lancets (A, C, E) and middle ventral parts of lancets (B, D, F). A, B, Caliroa aizankei, holotype. C–F, C. staphyleae: C, D, lectotype of C. staphyleae; E, F, holotype or paratype of C. staphylea. 5, fifth serrula. E, F, reversed.