Marmasoma sumptuosum White 1916
Creators: name: Rodrigues, Paula Fernanda Motta
name: Mcalister, Erica
name: Lamas, Carlos José Einicker
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Bombyliidae
Marmasoma
Marmasoma sumptuosum

description: Marmasoma sumptuosum White, 1916
(Figs 1–6)
Marmasoma sumptuosa White, 1916: 189 –190, lectotype male (NHMUK) designated herein; Hardy, 1921: 63, 83, plate XVI; Tonnoir, 1927: 102; Roberts, 1929: 579; Hull, 1973: 239, 241, 471, 490, 514, 519, 553; Theodor, 1983: 85; Yeates, 1994: 21, 31, 125; Evenhuis & Greathead, 1999: 209; Evenhuis & Greathead, 2015: 219.
Type material examined. LECTOTYPE male, by present designation, deposited at NHMUK and labeled as follows: “SYNTYPE [circular white label bordered with blue]”, “SYNTYPE/ Marmasoma sumptuosa White / det. J.E. Chainey, 1986”, “Tasmania/ Hobart/ 18.xi.1913 / A. White/ B.M. 1917–104”, and a red label written “Lectotype” was added along with a bar code (NHMUK010624781). Specimen in good condition.
Three paralectotype males (NHMUK), by present designation, labeled: 1) “ SYNTYPE [circular white label bordered with blue]”, “ SYNTYPE / Marmasoma sumptuosa White / det. J.E. Chainey, 1986”, “ Victoria / Dandenong Rgs/ nov.1898 / A. White/ B.M. 1917-104”, specimen in good condition apart from only retaining the left foreleg; 2) “ SYNTYPE [circular white label bordered with blue]”, “ SYNTYPE / Marmasoma sumptuosa White / det. J.E. Chainey, 1986”, “ Tasmania / Mangalore / 29.xi.1914 / A. White/ B.M. 1917–104”, specimen missing abdomen and hind legs; 3) “ SYNTYPE [circular white label bordered with blue], “ SYNTYPE / Marmasoma sumptuosa White / det. J.E. Chainey, 1986”, “ Tasmania / Mangalore / 8.xi.1913 / A. White/ B.M. 1917–104”, specimen missing left foreleg and right midlegs. A green label written “ Paralectotype ” was added to each specimen along with the bar codes, NHMUK 010624782, NHMUK 010624783 and NHMUK 010624784, respectively.
Non-type material examined. AUSTRALIA: A.C.T: Mt. Gingera, 5600 ft., 10.i.1952, I.B.F. col. (1 ♂, AMNH); Blundell’s, 06.i.1961, Paramonov col. (1 ♀, AMNH). New South Wales: Barrington Tops, 07.i.1934, Plomley col., B.M. 1937–216/ Marmasoma sumptuosa, White - H. Oldroyd, det. 1937 (2 ♂, 1 ♀, NHMUK); Katoomba Riches ic/13, 07.i.1921, Marmasoma sumptuosa White Id. by G.H. Hardy (1 ♀, QM); Paddy’s Rv., 03.xi.1948, Paramonov col., SEM Stub n°27, D.K. Yeates, 1992 (1 ♂, AMNH). South Australia: Ms. Lofty Ranges, 17.x.1984 (illegible collector name on label) (1 ♂, 1 ♀, QM). Tasmania: Cradle Mountain N.P. 1 km N Dove Lake, 07.i.1992, M.E. Irwin & B.J. Irwin cols., Illinois Nat. Hist. Survey (1 ♂, 1 ♀, QM). Victoria: Mt. Baw Baw, E. Vic., approx. 4000 ft, 14.i.1966, B. Cantrell col. (1 ♀, QM).
Redescription of male. Lectotype lengths: body 8.75 mm, wing 6.5 mm. Other specimens lengths: body 8.5–12.0 mm; wing 6.5–9.5 mm. (n = 9).
Head. Approximately as wide as thorax, holoptic (Fig. 1 B), compound eyes nearly 2.0 times higher than wide in lateral view (Fig. 3 A), joined for long distance, reducing frons to small triangle (Fig. 1 B); ocellar tubercle prominent placed at vertex, velvety dark brown with long and strong proclinate dark brown bristles (Fig. 3 A); frons dark brown with white pruinescence, medium-length thin pale scales; area posterior to ocellar tubercle velvety dark brown with short fulvous scales. Antenna (Fig. 1 A) velvety dark brown with gray pruinescence on scape and on pedicel, closely approximated at base; scape cylindrical, approximately 5.0 times longer than wide, from 4.0–6.0 times longer than pedicel, from equal to ½ length of postpedicel, with yellowish white hairs, short on dorsal surface and very long on ventral surface and laterally, sparse short and strong dark brown bristles, row of short and strong dark brown bristles on dorsal surface; pedicel subglobular in lateral view, nearly as long as wide, about 1/6 length of postpedicel plus stylus, with short dark brown bristles; postpedicel conical, expanded at base, 2.5 times longer than stylus, longitudinal groove on inner and outer surfaces, row of short dark brown bristles near base, on outer surface; stylus formed by two segments, bare, segment I rectangular, segment II lanceolate slightly longer than segment I; postpedicel plus stylus about 1.2 times longer than scape plus pedicel. Face short, light brown with gray pruinescence on upper 1/3; short and thin white bristles on median third of anterior margin of compound eyes; margin of clypeus and clypeus bare; gena with gray pruinescence, occluded, except below compound eye where it is linear; orogenal cup brown with gray pruinescence, slightly developed. Proboscis polished dark brown, 1.9 times longer than antenna, with short dark brown bristles, labellum 3/4 length of proboscis, with sparse short and thin bristles laterally; palpus brown, approximately 1/3 length of proboscis, formed by 2 segments, segment I 2.0 times longer than segment II, with longitudinal groove on ventral surface and short dark brown bristles, segment II with apparent subapical palpal pit located in a sulcus. Occiput velvety dark brown, divided by longitudinal groove extending from ocellar tubercle to occipital foramen (Fig. 1 B), pale scales near margin of eyes followed by fulvous scales that gradually increase in length towards occipital foramen, where scales long and thin, pale scales more concentrated on medial region along margin of compound eyes, longest posteriorly, thin dark brown bristles near margin of compound eyes and strong dark brown bristles on all surface; lower surface of head with long pale hairs.
Thorax. Pronotum very small, not prominent, light brown with gray pruinescence. Scutum moderately humped and convex, velvety dark brown, brown on margins, two median longitudinal stripes of white scales, bordered laterally and medially with fulvous scales that limit velvety dark brown central area with sparse fulvous scales, enlarged on posterior part, touching on lateral rows, long dark brown bristles, mainly on anterior third, strongest laterally (Fig. 3 B); postpronotal lobe unusually elongate, extending posteriorly from anterior margin of scutum, with gray pruinescence, long and thin white scales, short fulvous scales and long light brown bristles on anterior 1/3; notopleuron with longitudinal row of 4 strong and longer dark brown bristles; supra-alar area with 4 long and strong dark brown bristles, and long and short thin fulvous scales; postalar callus large, with 2 strong dark brown bristles and short fulvous scales; pleura dark brown with gray pruinescence; antepronotum (lateral) and proepisternum with long and strong orange bristles anteriorly and medium-length and thin white and pale scales; anepisternum with long and strong yellow bristles on upper third, long white and pale scales, sparse short white scales and brown scales posteriorly; katepisternum with medium-length yellowish white scales on upper 1/3; metepisternum with pale hairs; laterotergite with long yellowish white hairs on anterior 1/3 and row of long and strong orange bristles on posterior margin; mediotergite with long and thin white hairs and long and strong dark brown, orange and yellow bristles; proepimeron, anepimeron, meropleurite and metepimeron bare; dense tuft of hairs posterior to posterior spiracle; scutellum velvety dark brown, with dark brown scales medially, two longitudinal stripes of fulvous scales and yellowish white scales laterally, posterior margin with long dark brown bristles with apices convergent, bristles strongest on base and thinner on apex of scutellum (Fig. 3 B).
Wing (Fig. 2 A). Hyaline with brown areas along costal, cell r1 (except by small area on apex), basal half of cell r2+3, bifurcation of R4 and R5, apex of R4, around crossveins r-m, m-m and dm-cu, base of cells m1 and m2, and base of discal cell; costa with short dark brown bristles; costa with slight modified bristles that extend from basal 1/3 until nearly apex; R2+3 gently curved at apex; R4 sinuously curved toward apex; bifurcation of R4 and R 5 in line with m-m; discal cell sharply angulated below, with brown spot; anal cell open at wing margin by distance equivalent to ½ length of r-m crossvein; axillary cell narrow, slightly wider than anal cell; alula reduced; calypter whitish, with yellowish white hairs on margin; basicosta with fulvous scales; r-m crossvein at beginning of apical 1/3 of discal cell. Halter with stem light brown and short light brown scales, knob light brown with extreme apex yellowish white, with basal crease above and with cup-like depression apically.
Legs. Long and slender, light brown; coxae with long white hairs, forecoxa and midcoxa with strong yellowish brown bristles on apical 1/3 of anterodorsal surface; trochanter light brown with dark brown apex on ventral surface, short white covering scales on dorsal and ventral surfaces and sparse white thin covering scales on apex of ventral surface; tibiae with strong dark brown apical bristles, midtibia and hind tibia with short white and dark brown scales; tarsi long, about equal in length to tibiae, with dark brown bristles, longer and more concentrated ventrally, strong apical dark brown bristles; pulvillus light brown, little shorter than claws; claws long, curved on outer half, light brown with dark brown apex. Foreleg. Femur with fulvous scales, longitudinal row of thin dark brown bristles on ventral surface, strong apical dark brown bristle on posteroventral surface; tibia with white scales, longitudinal row of short dark brown bristles on anterodorsal surface and on apical ½ of posterodorsal surface, longitudinal row of strong dark brown bristles on dorsal and posterior surfaces. Midleg. Trochanter with sparse white hairs on ventral surface and sparse short dark brown bristles on apex of dorsal surface; femur with fulvous scales, and long and thin dark brown bristles on posteroventral surface, four strong apical dark brown bristles, two on anteroventral and two on posteroventral surfaces; tibia with longitudinal row of strong bristles on dorsal and posterior (long), anterior (short), and posterodorsal (medium-length) surfaces. Hindleg. Coxa with thin yellowish brown bristles on apical margin of anterior surface; trochanter with long yellowish white hairs on ventral surface; femur with scales, fulvous on basal ¾ and dark brown on apical ¼, longitudinal row of strong dark brown bristles on anteroventral and on apical ¼ of posteroventral surfaces; tibia with longitudinal row of strong dark brown bristles on posterior, posterodorsal, dorsal and anterior surfaces.
Abdomen (Figs 3 A and B). Dark brown, long, conical, much narrower than thorax beyond first segment, slightly tapering from segment II to apex in dorsal view, decumbent with apex upraised in lateral view, tergites with fulvous and sparse white covering scales laterally and dark brown scales medially, leaving appearance of abdomen fulvous with dark brown longitudinal central stripe, narrow bands of white scales on posterior margins; tergite I with more dense white scales, long and thin dark brown bristles laterally and on posterior margin, the latter strongest and convergent medially; segments II and III with long and thin dark brown bristles laterally and on tergites; remaining segments with short dark brown bristles laterally; sternites with white scales and dark brown bristles on posterior margins.
Male genitalia. Not rotated; epandrium covered with sparse brown scales and dark brown bristles, denser around margins, with long and conspicuous proximal ventrolateral processes (Figs 4 A and B), anterior margin concave medially, posterior margin slightly rounded laterally (Fig. 4 B); gonocoxites very elongated, apex pointed in lateral view, apically extending beyond attachment of gonostylus, about 2.0 times longer than wide (Fig. 4 E), fused ventrally, without median ridge (Fig. 4 D); gonocoxal apodeme very long, apex rounded in lateral view (Figs 4 C and E); hypandrium absent (Fig. 4 D). Aedeagus with basiphallus wide (Fig. 4 C), anterior margin rounded and posterior margin pointed in lateral view (Fig. 4 E); distiphallus conspicuous, very long S-shaped, curved downward and then backward at apex (Fig. 4 E), with serrated projections on dorsal and ventral surfaces of apical third (Fig. 5), not exceeding posterior margin of gonocoxite in lateral view (Fig. 4 E). Lateral aedeagal apodeme very short, not exceeding lateral margin of gonocoxite in dorsal view (Fig. 4 C). Ejaculatory apodeme small, dorsal margin slightly rounded and ventral margin S-shaped in lateral view (Fig. 4 E), not exceeding anterior margin of gonocoxite in dorsal view (Fig. 4 C). Gonostylus parallel-sided, with sparse dark brown bristles, denser on external surface of proximal third, apically obtuse with ventral conspicuous, strongly sclerotized, claw-shaped process (Fig. 5 A).
Female. Lengths. Body 8.5–11.0 mm; wing 7.0– 9.5 mm. (n = 6). Similar to male, except: dichoptic compound eyes separated by distance from 2.0–3.0 times width of ocellar tubercle (Fig. 1 D), from 1.2–1.5 times higher than wide (Fig. 3 C); ocellar tubercle dark brown with gray pruinescence, little evident; frons dark brown with white tomentum, longitudinal row of strong and long dark brown fronto-orbital bristles on each side divergent medially on upper half, long and thin white scales on lower ½, yellowish brown bristles on upper third (Fig. 1 D); area posterior to ocellar tubercle brown with gray pruinescence and short fulvous scales; postpedicel dilated in lateral view (Fig. 1 C); wing infuscation dark with angle of discal cell frequently marked by small projection entering cell (Fig. 2 B); discal cell with projection entering cell m2, brown spotted (Fig. 2 B); abdomen broadest medially and apically pointed (Fig. 3 D), more conspicuously clothed with scales. Female genitalia: Sternite 8 with median row of long hairs, modified into internal concave sheet with strong median ridge; tergite 8 invaginated, with long anterior apodeme and long dark brown bristles on posterior margin (Fig. 6 C); acanthophorites with dark brown spines (Fig. 6 C); spermathecae short, spermathecal bulbs oval, 2 times longer than wide; spermathecal ducts in two sections (basal and apical), divided by sperm pump (Fig. 6 A); apical spermathecal duct 3.5 times longer than sperm pump, broader towards apex; sperm pump same length as spermathecal bulb, with numerous lateral papillae (Fig. 6 B); sclerotized collars absent; basal spermathecal ducts wide, striated in their proximal part, three ducts are joined basally forming long common spermathecal duct connected to “U” shaped furca, formed by two wide triangular bars (Fig. 6 A).
Geographic records (Fig. 7). Australasian/Oceanian: Australia (Australian Capital Territory, New South Wales, Queensland, South Australia, Tasmania, Victoria and Western Australia).
Remarks. One of the paralectotypes does not have bristles on the scape. Hull (1973) pointed out that this species also occurs in Western Australia. Unfortunately, the authors did not have access to any specimens from this region.
description: Published as part of Rodrigues, Paula Fernanda Motta, Mcalister, Erica & Lamas, Carlos José Einicker, 2017, Review of Marmasoma White with lectotype designation of M. sumptuosum White and an identification key to the Australasian / Oceanian genera of Ecliminae (Diptera, Bombyliidae), pp. 185-196 in Zootaxa 4232 (2) on pages 188-195, DOI: 10.11646/zootaxa.4232.2.3, http://zenodo.org/record/292803