Schildia gracillima ( Walker, 1855 ),

Dikow, Torsten & Bayless, Keith M., 2009, Taxonomic revision of the genus Schildia Aldrich, 1923 (Diptera: Asilidae: Leptogastrinae) with the description of new extant and extinct species, Insect Systematics & Evolution 40, pp. 253-289: 271-273

publication ID

http://doi.org/ 10.1163/187631209X458358

publication LSID

lsid:zoobank.org:pub:670E7C5B-7889-478D-AD7B-0FCBE1AECDD8

DOI

http://doi.org/10.5281/zenodo.4331937

persistent identifier

http://treatment.plazi.org/id/0383F52F-FF87-AD63-4102-FB8EFEFC4F6D

treatment provided by

Torsten

scientific name

Schildia gracillima ( Walker, 1855 )
status

 

Schildia gracillima ( Walker, 1855)  ( Figs 16–18View Figs 13–24, 38View Fig) Leptogaster gracillimus ( Walker 1855: 770  , 722)

Schildia gracillima  ( Martin 1965: 110, 114; Martin 1968b: 5; Martin 1975: 190).

Schildia ocellata  ( Martin 1975: 189, 192). syn.n.

Diagnosis. This species is distinguished from its congeners by its long body length, the narrow vertex that is as narrow as the face, the laterally apruinose occiput, and the very short and dense trichoid spicules.

Redescription. Head: Face silver pruinose, wide, wider than adjacent ommatidium; mystax light yellow, 2 setae; vertex narrow, narrower than face at clypeal–facial margin, silver pruinose; occipital triangle apruinose, distance between triangle and median eye margin less than adjacent ommatidium; occiput thinly silver pruinose along eye margin, medially silver pruinose, laterally apruinose; postocular setae short, brown; proboscis brown; Antennae: scape and pedicel light brown, light brown setae dorsally and ventrally; postpedicel proximally light yellow, brown distally, silver pruinose, about 1.5 times as long as combined length of scape and pedicel; stylus brown, about 2/3 as long as postpedicel, composed of 1 element.

Th orax: Predominantly light brown, parts silver and brown pruinose; antepronotum, postpronotum, and median postpronotal lobes silver pruinose; lateral postpronotal lobes apruinose, light yellow; scutum brown, predominantly apruinose, only posterior margin silver pruinose, 2 yellow lateral longitudinal stripes originating at anterior margin but not reaching posterior margin, broader anteriorly and pointed posteriorly, 2 yellow lateral spots positioned predominantly presutural; presutural dc setae: 2 short, 1 intermediate, 2 long, postsutural dc setae: 2 anteriorly oriented as long as intermediate presutural dc setae, acr setae absent, 1 npl and 1 spa seta; anepisternum predominantly silver pruinose sometimes apruinose dorsally, few yellow anepisternal setae on anterior and dorsal margins; anepimeron anteriorly silver and posteriorly brown pruinose, proepimeron silver pruinose, katepisternum anteriorly silver and posteriorly brown pruinose, meron+metanepisternum anteriorly apruinose and posteriorly silver pruinose, metkatepisternum yellow, silver pruinose; scutellum yellow posteriorly and brown medially, silver pruinose, 4–6 very short apical scutellar setae; Legs: yellow to brown; coxae and trochanters light yellow, trochanters sometimes brown ventrally; pro and mes femora light yellow with 1 transverse light brown band medially, met femur mostly light brown to brown, clubbed in distal 2/5, club brown, yellow transverse band at proximal margin of club, scattered brown setae on pro and mes femora, met femur with distinct rows of brown macrosetae; pro and mes tibiae light yellow with 1 light brown transverse band which is sometimes diffi cult to discern, met tibia brown with yellow transverse band in distal half, 2 times wider than width of tibia, all tibiae with brown erect macrosetae in rows, pro and mes tibiae with 2 long apical macrosetae, met tibia with 2 apical, 2 medial in distal quarter, 4 lateral macrosetae spaced along tibia; tarsus light yellow to light brown, proximal tarsomere always longer than 2 following tarsomeres combined, short and long macrosetae on all tarsomeres; all empodia 1/3 as long as median claw; median claw about 3/4 as long as lateral claw; Wings: length = 5.3–7.8 mm; few microtrichia scattered on wing, trichoid spicules very short, densely arranged, symmetrical dorsally and ventrally, 40–50 on M1 between r-m and diversion of M1 and M2; cell d large, terminating in M1 and M2, r-m situated at separation of M3 and CuA1; R1 reaching C at the point where R5 joins C but distal to M1 joining C, R2+3 straight proximally and smoothly arching posteriad distally; halter light yellow, knob dark brown, length = 0.9–1.3 mm.

Abdomen: Brown, T1 yellow, T2 yellow anteriorly, sometimes T3-6 also yellow anteriorly; T2 length = 4.9–5.1 mm, T2 with yellow transverse band medially, T2–3 with short, erect, evenly spaced macrosetae, remaining T with irregularly spaced and longer macrosetae, T7–8 with large lateral sensory areas; Male terminalia ( Figs. 16–18View Figs 13–24): epandrial halves fused medially, distal tip arching dorsad, pointed; epandrium and hypandrium entirely fused proximally, gonocoxite easily distinguishable but fused to hypandrium, distinct ventral suture discernible; gonostyli bifid with two apices; Aedeagus: not protruding from hypopygium; dorsal aedeagal sheath with curved ventral protuberances; lateral ejaculatory process cylindrical; Female genitalia: spermathecae occupying only segment 8, individual spermathecal ducts long and coiled; spermathecal reservoirs not sclerotized, as wide as individual ducts, forming a coil.

Type material. The ♂ holotype of Leptogaster gracillimus  is labeled “ Type (circular label, green submarginal margin) Leptogaster gracillimus  Wlk. (handwritten) / Brazil Parà H.W. Bates 51-55 (handwritten) / Holotype (circular label, red border) / Holotype Leptogaster gracillimus Walker  det. J.E. Chainey 1982 (handwritten) / Bangil (circular label, handwritten) / gracillimus  (handwritten)” ( BMNH). The specimen is directly mounted and is in good condition (missing some legs)  .

The ♂ holotype of Schildia ocellata  is labeled “Ter. AMAPA Rio Amapari J. Lane col. (handwritten, black submarginal border) / 2.VII.59 (handwritten) / ♂ / HOLOTYPE Schildia ocellata Chas. H. Martin  (species name handwritten, red label) / Schildia ocellata Martin  Det. C.H. Martin 19 (species name handwritten, black submarginal border) / Schildia gracillima ( Walker, 1855)  det. T. Dikow & K. Bayless 2007” ( MZSP). The specimen is mounted on label paper and is in good condition (antennae broken)  .

Specimens. 1♀ Utinga, Belem , 01°27’S 048°30’W, 18.vi.1963, M. Amaral ( MZSP),GoogleMaps  1? Mocambo do Espirito Santo , 00°42’N 055°55’W, 26.v.1977, M. Torres ( MZSP);GoogleMaps  Peru: 1♀ no locality and date ( ZSMC)GoogleMaps  .

Distribution. Brazil, Peru ( Fig. 38View Fig). Biodiversity hotspot/high-biodiversity wilderness area: –/Amazonia ( Fig. 38View Fig).

Remarks. Schildia ocellata  , described from north-eastern Brazil by Martin in 1975, is here synonymized with S. gracillima  as the holotypes are morphologically indistinguishable.

BMNH

United Kingdom, London, The Natural History Museum [formerly British Museum (Natural History)]

MZSP

Brazil, Sao Paulo, Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

ZSMC

Germany, Muenchen [= Munich], Zoologische Staatssammlung

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Asilidae

Genus

Schildia

Loc

Schildia gracillima ( Walker, 1855 )

Dikow, Torsten & Bayless, Keith M. 2009
2009
Loc

Schildia ocellata

Martin 1975: 189
1975
Loc

Schildia gracillima

Martin 1975: 190
Martin 1968: 5
Martin 1965: 110
1965
Loc

Schildia gracillima (

Walker 1855: 770
1855