Siobla atra Malaise 1945
Creators: name: Niu, Gengyun
name: Wei, Meicai
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Siobla
Siobla atra

description: Siobla atra Malaise, 1945
(Figs 3 a, 3b, 5e, 5f, 7j, k, 7n, 7p, q, 9c, 9p)
Siobla atra Malaise, 1945: 123. ♀, type locality: Kambaiti (Myanmar). (Excluding males). Siobla rufipes Malaise, 1945: 124. ♂, type locality: Kambaiti (Myanmar). Syn. nov. Siobla rufipes var. infuscata Malaise, 1945: 124. ♂, infrasubspecific name.
Description. Lectotype: ♀. Length, 11.5 mm (Figs 3 a, 5e). Body and legs black; very narrow posterior margin of pronotum dark brown, 2nd abdominal tergite with small white spots near spiracles; anterior of fore femur and most of tibia and of tarsus brown, middle tarsus black brown, hind trochanter black brown. Body hairs silver, hairs on dorsal side of head pale brown. Wings hyaline, vein C black, pterostigma black brown, other veins deep brown or blackish brown.
Punctures on head large, dense and coarse without shiny interspaces, labrum sparsely punctured; prescutum, scutum, and anterior slope of mesoscutellum densely punctured, with narrow interspaces; lateral and posterior slope of mesoscutellum densely punctured, without interspaces; posttergite shiny with lateral corners microsculptured; parapsides with large and sparse punctures and dense microsculpture; metascutellum with anterior slope shiny with microsculpture and posterior slop densely and irregularly punctured; metapostnotum shiny with margins slightly microsculptured; middle and upper of mesepisternum densely and coarsely punctured, without shiny interspaces, venter with large and shiny interspaces between small and sparse punctures; anepimeron coarsely punctured, upper of katepimeron with large punctures, interspaces obviously longer than diameter of punctures, middle and lower of katepimeron microsculptured; upper of metepisternum with dense and small punctures, interspaces shiny, narrower than diameter of punctures, venter sparsely punctured, shiny; basin of metepimeron weakly microsculptured, dorsum with large punctures and posterior corner shiny. First abdominal tergite feebly microsculptured, shiny, lateral edges slightly punctured; other tergites obviously microsculptured, almost mat, lateral edges of both 3rd and 4th tergites, posterior of 4th tergite, and most of 5th to 8th tergites obviously punctured.
Hairs on dorsum of head straight, as long as diameter of lateral ocelli. Clypeus without a transverse carina, anterior margin truncate; malar space as long as transverse diameter of median ocellus; shortest distance between eyes below antennal sockets in front view 1.1 × eye height; middle fovea broad with a short deep furrow on bottom; interocellar furrow deep, postocellar furrow broad and shallow; postocellar area 1.5 × as broad as long, weakly elevated and clearly below top of ocelli, without middle ridge; lateral furrows weakly curved, deep in entire length, subparallel; head behind eyes 0.8 × as long as eye in dorsal view; curved laterally and then convergent posteriorly; genal carina sharp, complete (Fig. 7 j). Antenna as long as head, thorax and abdominal tergites 1–2 together, as long as vein C, 2nd antennomere 1.5 × as long as broad, relative length of 3rd to 4th antennomeres as 1.7, 5th to 8th antennomeres hardly compressed, outer sides of 5th to 8th antennomeres with weak furrows, 7th antennomere 2.6 × as long as broad. Middle furrow of prescutum distinct; mesoscutellum distinctly elevated, as high as scutum. Metabasitarsus 5 × as long as broad, 0.8 × length of following 4 tarsomeres combined, hind inner tibial spur 0.45 × length of metabasitarsus. Pulvilli of hind tarsus small. Ovipositor sheath as long as middle tibia in lateral view; exposed part of apical sheath about 2 × as long as broad, apical sheath 1.5 × as long as basal sheath, apical sheath narrow in dorsal view, exposed part 4 × length of cerci, lateral setae on both sides of sheath straight, forming an angle about 50 degree. Lancet broadened before apex, with 16 serrulae (Fig. 9 c), middle serrulae each with 18–20 distal fine teeth (Fig. 9 p).
Male. Length, 10 mm (Figs 3 b, 5f). Body black; 2nd to 4th abdominal tergites, 2nd to 5th abdominal sternites, and most of 6th sternite yellowish brown; legs yellowish brown to orange, each coxa, fore and middle trochanter, a small dot on apex of hind femur black; similar to female in structure, but malar space 0.5 × transverse diameter of median ocellus (Fig. 7 q); shortest distance between eyes below antennal sockets in front view 1.05 × eye height; head behind eyes 0.6 ×eyes in dorsal view, curved laterally and then strongly convergent posteriorly; genitalia as in Figs 10 u, 10v.
Variation. A female collected from Yunnan has the hind trochanter dark brown and first abdominal tergite less microsculptured. A male collected in Myanmar, which is named as S. rufipes var. infuscata Malaise, 1945, has the second tergite black.
Specimens examined. MYANMAR: Lectotype (hereby designated), Siobla atra ♀, “N. E. BURMA, Kambaiti, 7000ft, 24/5, R. MALAISE”; [red] “ Typus ”; “ Siobla atra n. sp., Malaise det. 1936”; “NHRS-HYME 000005304”; “ Lectotype, Siobla atra Malaise, 1945, Design Niu G. 2012” (NRHS); Paralectotypes of S.atra: 2 ♀, same data as the lectotype, but 28/5, 1 ♀ same data but 8/5. The specimens bear the ID numbers NHRS-HEVA 0 0 0 0 0 1608 - NHRS-HEVA 0 0 0 0 0 1610 (all NRHS). 1 ♀, same data as the lectotype, but 24/5 (CSCS); 2♀, same data (BMNH); 1 ♀, same data as the lectotype, but 28/5 (MNCN, teste Taeger). [Furthermore, 21 ♂ that belong to S. semipicta, see there].
Lectotype (hereby designated), Siobla rufipes ♂, “N. E. BURMA, Kambaiti, 7000ft, 26/5, R. MALAISE”, “ Typus ”, "NHRS-HYME 000005297”, Siobla rufipes n. sp., Malaise det. 1936; Lectotype, Siobla rufipes Malaise, 1945, Design Niu G. 2012; Siobla atra Malaise, 1945 Det. Niu G. (NRHS); Paralectotypes of S. rufipes: According to Taeger (pers. comm.), in addition to the lectotype there are 35 males at the NRHS. 14 are from "Kambaiti 7000 ft.", 17 from "Kambaiti 2000 m ", 3 "Kambaiti 1800m ", and one without data. Only 3 of these specimens got Malaise’s identification labels. The 33 specimens from 7000 ft. and 2000 m respectively, are considered to belong to the type series: 1♂ “N. E. BURMA, Kambaiti, 7000ft, 23/4, R. MALAISE”; 3 ♂, same data but 24/4; 2 ♂, same data but 28/4; 2 ♂, same data but 29/4; 4 ♂, same data but 22/5; 1 ♂, same data but 26/5; 1 ♂, same data but 5/6; 1 ♂, same data but 2000 m and 4/4; 4 ♂, same data but 15/5; 12 ♂, same data but 1/6. The specimens bear the ID numbers NHRS-HEVA 0 0 0 0 0 1555 - NHRS-HEVA 0 0 0 0 0 1585. 1 ♂, “N. E. BURMA, Kambaiti, 7000ft, 21/5, R. MALAISE”, “ Typus ” “var. S. rufipes n. sp. infuscatus var., det. Malaise, 1936”, “ Paralectotype, Siobla rufipes Malaise, 1945, Design Niu G. 2012” (all NRHS). 13 ♂ same data as lectotype, but collecting days not recorded. (BMNH); 1#m same data as lectotype but 2000m, 9. V. 1934 (HNHM); 1#m same data as lectotype but 1. V. 1934 (CSCS); 1 ♂, same data as the lectotype, but 28/4 (MNCN, teste Taeger).
Other material: CHINA: Yunnan:.1♀, Heiwadi, Gongshan, Yunnan, 27.800°N, 98.590°′E, alt. 2000m, 6 Jun. 2009, Zhong Yihai leg. (CSCS), 1♂, Gongshan 10km NW, +27.79700, +98.58500, 2150m, 0 6.06.2009, Leg. S. M. Blank, A. D. Liston & A. Taeger; Siobla atra Malaise, 1945 Det. Niu G. (SDEI) barcode: BOLD:ABV4520 (Taeger pers. comm.).
Distribution. China (Yunnan); Myanmar.
Remarks. This species is close to S. carinoclypea Niu &Wei, 2010 but differs from it in the anterior margin of clypeus truncate without a middle incision and without transverse carina (Fig. 7 n, 7k); the postocellar area weakly elevated (Fig. 7 k), clearly below top of ocelli, and 1.5 × as broad as long; the lateral furrows of postocellar area curved and deep in entire length (Fig. 7 j); the ovipositor sheath as long as middle tibia; the lancet with 16 serrulae and the middle serrulae each with about 18–20 distal fine teeth; the femora and tibia in male almost entirely orange; the shortest distance between eyes below antennal sockets in front view in male about as long as eye height.
Taeger (pers. comm.) assumes that the male types of S. atra belong to S. semipicta, and S. rufipes is the male of S. atra. After careful study, we confirm that standpoint. Malaise (1945) recorded 30 rufipes specimens from Kambaiti at 2000 m. Already in the NHRS collection 33 specimens are to be found, and further specimens in other collections. Referring to Malaise's papers, it is obvious that he often estimated or rounded higher numbers of specimens (Taeger, pers. comm.). As there is no indication to exclude specimens with the data given by Malaise, 13 additional specimens of S. rufipes from the BMNH, one from HNHM, one from CSCS, and one from MNCN were labeled as paralectotypes.
description: Published as part of Niu, Gengyun & Wei, Meicai, 2013, Revision of the Siobla formosana group (Hymenoptera: Tenthredinidae), pp. 41-68 in Zootaxa 3746 (1) on pages 45-46, DOI: 10.11646/zootaxa.3746.1.2, http://zenodo.org/record/285307