Rivellia israelica Bodner & Freidberg, 2016, n. sp.
Creators: name: Bodner, L.
name: Freidberg, A.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Platystomatidae
Rivellia
Rivellia israelica

description: Rivellia israelica n. sp.
(Figs. 18, 29, 40, 51, 62, 73, 76, 87, 100)
Diagnosis. This species is diagnosed both in the key to the Platystomatidae of Israel and in the generic diagnosis above. It was not found to be conspecific with any of the Palaearctic species keyed by Hennig (1945). However, we did not continue comparing our specimens with specimens or descriptions of the remaining 130 species around the world. See also the explanatory comment under the genus title above.
Description. Head (Figs. 18, 29): Structure: First flagellomere truncate and more or less angular apically, often distinctly pointed dorsoapically; arista with short dense rays, nearly plumose, total width including rays about 0.25–0.33 times height of 1st flagellomere. Color and vestiture: Head yellowish-brown. Conspicuous narrow stripes of silvery-white microtrichia present only around eye, especially noticeable along posteroventral margin of eye. Ocellar triangle blackish, subshiny, not microtrichose. Lunule yellow. Antenna mostly yellowish but tip blackish, and dark coloration often extended more proximally, with fine microtrichia. Face yellowish, dorsal half with dense grayish microtrichia. Clypeus shiny brownish, without microtrichia. Palpus yellow. Proboscis shiny brownish (sometimes discolored). Chaetotaxy: Frons densely setulose, bare around ocellar triangle. 2 (pairs) orbital setae and 0–1 (pair) of postocellar seta present. Lunule setulose. Usually 1 conspicuous genal seta present, among several sparse, thin, moderately long, straight brownish setulae. Occiput sparsely setulose. Ratios: Head: 1.20–1.37; frons anterior: 1.03–1.24; frons posterior: 0.91–1.09; ocellar triangle/frons: 0.28–0.44; eye: 1.65–1.89; 1st flagellomere: 2.84–3.97; gena/eye: 0.15–0.19; parafacial/gena: 0.15–0.32; posterior orbital/anterior orbital: 0.49–0.81; medial vertical/lateral vertical: 0.89–1.00; posterior orbital/medial vertical: 0.40–0.72; ocellar/medial vertical: 0.48–0.59; ocellar/ocellar triangle: 0.80–1.26.
Thorax: Color and vestiture: Ground color usually black and yellow, greatly varied among the specimens; in dark specimens most of mesonotum from neck to scutellum, but not postpronotum and area around it, notopleuron and posterolateral margin of scutum to level of dorsocentral seta blackish; subscutellum, mediotergite and laterotergite also blackish; katepisternum black except dorsally, strongly shiny, almost without microtrichia; laterotergite and small area between base of forecoxa and anterior spiracle with conspicuous small whitish or silvery spots of microtrichia. In pale specimens blackish area either restricted to median region of scutum or attains U-shaped form, with blackish extension from arm of U laterally along transverse suture, and pleura entirely yellow, although mediotergite partly blackish; in dark specimens mesonotum almost entirely blackish, except more or less narrow margin, and mediotergite and ventral pleura blackish, mesonotum covered with thin microtrichia. Mediotergite mostly shiny, laterally microtrichose. Chaetotaxy: Postpronotal lobe with 1 seta and brownish or yellowish setulae. Scutum setae (pairs): 1–2 scapular, 0–2, usually 0 or enlarged setulae, presutural supra-alar, 1 postsutural supra-alar, 1 postalar, 1 intra-alar, 1 dorsocentral and 0–1 acrostichal. 2 notopleural setae present. Scutum uniformly short setulose; setulae usually about 0.2 times as long as adjacent major setae. Scutellum with 2 (pairs) scutellar setae, basal about 0.5 times as long as apical, scutellum also with 10–15 setulae. Pleura: Anepisternum posteriorly uniformly short setulose with 1–2 posterodorsal setae; setulae thin, erect, yellowish. Anepimeron with 1 seta and several fine setulae. Katepisternum with 1–2 setae ventrally, and with sparse, erect, long, yellowish setulae. Ratios: Scutum: 1.10–1.52; postsutural supra-alar/intra-alar: 0.52–0.96; postalar/intra-alar: 0.99–1.25.
Legs: Color and vestiture: Leg entirely yellow except hind tibia almost entirely brownish, except base and tip, non-microtrichose. Chaetotaxy: only fore femur posteroventrally with distinct row of setae, with 3–4 distal setae larger and darker. Otherwise, without overt features.
Wing (Fig. 40): Pattern: In most species, including the new species from Israel, wing banded, with 4–5 bands variable in dimension, orientation and degree of coalescence. Basal band usually marginal and longitudinal; distal two bands usually joined together along costa; pattern sometimes reduced to single band and small spot, or wing almost entirely hyaline. Venation: Veins generally yellowish to pale brown. Vein M ends slightly posterior to wing tip. Crossvein DM-Cu slightly curved toward base of wing. Calypteres white. Halter microtrichose, with yellowish base and stem and blackish knob. Chaetotaxy: R1 dorsally with dense row of evenly-spaced short black setulae, ventrally bare. R4+5 dorsally with row of short sparse blackish setulae, ventrally with 2 setulae aligned with pterostigma. Tegula usually with short blackish setulae and 2–4 black setae. Ratio: Wing: 2.29–2.98.
Abdomen: Structure: Male and female with 5 preabdominal tergites. Female’s T6 absent. Color and vestiture: Ground color black or blackish, subshiny, shagreened. Microtrichia absent completely. Male terminalia (Figs. 51, 62, 73): Epandrium in lateral view ventrally convex and not saddle-shaped, squarish anteriorly, prolonged posteriorly; prolongation considerably longer than squarish part. Lateral surstylus indistinguishable from epandrium (without obvious articulation), apparently fused with it and strongly sclerotized. Subepandrial sclerite not bent ventrally in middle. Medial surstylus hidden by lateral surstylus. Two heavily sclerotized claw-like prensisetae present. Phallus with bulbous preglans and glans, and with 2 equally-long terminal filaments; terminal filaments with swollen base. Female terminalia: Ovipositor mostly as in Platystoma (Fig. 74); cercal unit (Fig. 76) broadened basally; subapical ventral setulae not adjoined. 3 spermathecae present (Fig. 87), 2 connected by common duct broadened into single atrium; 3rd single spermatheca also opens into similar atrium; spermatheca shallow funnel-like, moderately sclerotized, with smooth surface, without ring-shaped base, apical bulge and internal structure. Ratios: Male: T3/T4: 0.83–0.93; T4/T5: 1.14–1.37; T3+4/T5: 2.11–2.54; epandrium: 0.98–1.01; preglans: 0.75–0.88; glans: 1.89–1.97; preglans/glans: 0.28–0.33; acrophallus/preglans+glans: 1.57–1.6; distiphallus/preglans+glans: 4. Female: T3/T4: 0.63–0.84; T4/T5: 1.44–2.81; T3+4/T5: 2.52–4.75; aculeus: 4.39– 5.26; cercal unit: 3.370–3.373; cercal unit/aculeus: 0.25–0.26.
Measurements (mm). Body length: 3.45–3.94; wing length: 2.70–3.36.
Material examined. Holotype: Ƌ, ISRAEL, Park HaYarden, 20.vi.1982, A. Freidberg, malaise trap. Paratypes: same collection data as holotype (12Ƌ, 92♀); additional paratypes (all from Israel): Panyas (usually as ' Baniass'): 24.iv.1982, AF (3Ƌ, 2♀), F. Kaplan (2♀), I. Yarom (1♀), 5.v.1977, D. Simon (1Ƌ, 2♀), 9.vi.1976, AF (1Ƌ, 1♀), D. Simon (1♀), 10.vi.1976, D. Simon (2♀), 13.vi.1982, AF (2Ƌ, 1♀), 28.vi.1977, AF (1♀), 10.vii.1975, M. Kaplan (2♀), 25.vii.1985, AF (1♀), 30.viii.1981, AF (1♀); Tel Dan: 5.v.1977, AF (6Ƌ, 8♀), D. Simon (1♀), 6.v.1979, D. Furth (1Ƌ, 1♀), 16.v.1971, AF (2Ƌ, 3♀), 27.v.2003, AF (1Ƌ), 18.x.1969, AF (2Ƌ); HaGosherim, 21.iv.1969, AF (1♀); ' Enot ' Enan, 1.v.2006, L. Friedman (2Ƌ); Rosh Pinna, 19.vii.1977, AF (1Ƌ); Park HaYarden: -200[m], 32°54.6'N 35°37.5'E, 21.iii.2010, E. Morgulis (1Ƌ), 32°54.5'N 35°37.5'E, 14.iv.2011, AF (2♀), 7.v.2009, AF (1Ƌ, 1♀), 17.v.1997, AF (1♀), W. Kuslitzky (1♀), - 190m, 32°54.7'N 35°37.6'E, 22.v.2011, E. Morgulis (1♀), 14.vi.1982, AF (3Ƌ, 2♀), 16.vi.1982, AF (6Ƌ, 2♀), 17.vi.1982, AF (1Ƌ), 24.vi.1982, AF (1♀), 25.vii. [19]83, Y. Zvik (1♀), 5.viii.1986, AF (1Ƌ), [P. HaYarden], 7.viii. [19]83, Nussbaum (3Ƌ, 1♀); Biq'at Bet Zayda [Bteicha]: 14.iii.1975, AF (1♀), 11.viii.1970, AF (1Ƌ, 1♀); ' En Gev, 7.v.1997, AF (1♀); Rosh ha'Ayin, 8.vi.1996 (2Ƌ, 1♀).
The holotype (Fig. 100) is double-mounted (minutien pin and polyporus block), in excellent condition, and deposited at the SMNHTAU. Most paratypes are deposited at the SMNHTAU; some paratypes will be deposited at the museums listed in the Material and Methods section.
Distribution. Israel.
Distribution in Israel. Mostly along the Rift Valley—Upper Galilee, Golan Heights and Jordan Valley. A few specimens were collected in the Central Coastal Plain (Rosh ha'Ayin).
Etymology. The specific epithet ‘ israelica’ denotes the country from which this species is known and in which it is geographically isolated from other members of the genus.
Adult activity in Israel. March to October.
FIGURES 63–73. Phallus. 63. Platystoma arcuatum. 64. P. dalia. 65. P. dimidiatum. 66. P. elizabethae. 67. P. geula. 68. P. malatiense. 69. P. nitidiventre. 70. P. pubescens. 71. P. torridum. 72. P. trigonum. 73. Rivellia israelica.
FIGURES 77–87. Spermathecae. 77. Platystoma arcuatum. 78. P. dalia. 79. P. dimidiatum. 80. P. elizabethae. 81. P. geula. 82. P. malatiense. 83. P. nitidiventre. 84. P. pubescens. 85. P. torridum. 86. P. trigonum. 87. Rivellia israelica.
description: Published as part of Bodner, L. & Freidberg, A., 2016, Taxonomy and immature stages of the Platystomatidae (Diptera: Tephritoidea) of Israel, pp. 201-245 in Zootaxa 4171 (2) on pages 232-241, DOI: 10.11646/zootaxa.4171.2.1, http://zenodo.org/record/158862