Research Article |
Corresponding author: Ahmed M. Soliman ( ammsoliman@gmail.com ) Academic editor: Norman Johnson
© 2019 Ahmed M. Soliman, Neveen S. Gadallah, Hathal M. Al Dhafer.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Soliman AM, Gadallah NS, Al Dhafer HM (2019) First record of the genus Oodera Westwood, 1874 (Hymenoptera, Pteromalidae, Cleonyminae, Ooderini) from the Arabian Peninsula, with the description of four new species. ZooKeys 874: 47-68. https://doi.org/10.3897/zookeys.874.35935
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The genus Oodera Westwood, 1874 (Hymenoptera, Pteromalidae, Cleonyminae) is recorded for the first time for the Arabian Peninsula, from the Kingdom of Saudi Arabia and the Sultanate of Oman. The present study is based on specimens reared from xylophagous beetle larvae of the family Buprestidae (Coleoptera) infesting dead Acacia trees from Al-Dakhiliyah and Dhofar governorates in Oman and Al-Baha, Asir and Riyadh regions in Saudi Arabia. Four new species, Oodera arabica sp. nov., O. omanensis sp. nov., O. rapuzzii sp. nov., and O. similis sp. nov. are described, illustrated and compared with closely related Oodera species. An illustrated key and the xylophagous host records of the species are also provided.
Acacia, Oman, parasitic wasp, Saudi Arabia, systematics, xylophagous hosts
Oodera Westwood, 1874 (Hymenoptera, Pteromalidae, Cleonyminae) is a relatively small genus comprising currently twenty valid species (
The phylogenetic status of Oodera has remained in dispute for a long time (
The first comprehensive work dealing with the taxonomy of the genus Oodera was that of
In the present study, Oodera is recorded for the first time for the fauna of the Arabian Peninsula, from Oman and Saudi Arabia. Specimens were reared from the dead wood of Acacia sp. trees. Four new species are described and illustrated. An illustrated key and the xylophagous hosts of species are also provided.
The present study is based on 25 specimens reared from dead wood of Acacia sp. trees collected from Al-Dakhiliyah and Dhofar governorates in Oman and Al-Baha, Asir and Riyadh regions in Saudi Arabia, as follows:
Oman, Al-Dakhiliyah: Al-Hamra (23°10'26"N, 57°08'49"E, alt. 825 m).
Oman, Dhofar: Mirbat (17°11'09"N, 54°59'31"E, alt. 500 m); Rawiyya (17°20'45"N, 54°03'57"E , alt. 650 m).
Saudi Arabia, Al-Baha: Shada Al-Ala Natural Reserve (19°51'40"N, 41°18'16"E, alt. 1248 m); The Ain Village (19°55'47"N, 41°26'38"E, alt. 760 m); Wadi Tourabah (20°11'36"N, 41°17'50"E, alt. 1830 m); Wadi Shoqab (20°40'27"N, 41°15'02"E, alt. 1440 m); Wadi Yabah (19°16'32"N, 41°48'33"E, alt. 440 m).
Saudi Arabia, Asir: Wadi Sabian (28 km S. Muhayil) (18°17'55"N, 42°07'41"E, alt. 809 m).
Saudi Arabia, Riyadh: Wadi Al Hesiyah (40 km NW Riyadh) (24°55'22"N, 46°12'15"E, alt. 790 m).
The collected specimens were pinned directly for further study. Identification of the new species was made with the help of
Photographic images were taken using a Canon EOS 70D camera attached to a Leica MZ 125 stereomicroscope. Individual source images were then stacked using HeliconFocus v6.22 (HeliconSoft Ltd) extended depth of field software. Further image processing was done using the software Adobe Photoshop CS5.1 (ver. 12.1x 32) and Adobe Photoshop Lightroom 5.2. Morphological measurements of the different parts were made with the help of a Zeiss Stemi 2000-C stereomicroscope with an ocular micrometer (100 lines per mm). Body part measurements were taken with the same magnification (20× eyepiece, 2.5× objective) for calculating different body ratios accurately and facilitate comparison. The detailed description for each species under study is based on the holotype specimen; for the diagnosis, all specimens under study were measured, and the minimum and maximum values are used.
The distribution of the prospected sites is plotted using ArcGIS 10.4. (Fig.
Oodera
Westwood, 1874. Thesaurus Entomologicus Oxoniensis: 145. Type species: Oodera gracilis Westwood; subsequent designation by
Stellophora
Risbec, 1951. Mem. Inst. Er. Afr. Noire 63: 239. Type species: Stellophora magnifica Risbec by monotypy. Synonymized by
Individuals of Oodera are diagnosed by the following combination of character states: head with deep scrobes in the form of an inverted V; parascrobal area of the head crested (= corona of
1 | Body medium-sized (7.0−7.2 mm); antenna with scape, pedicel and basal half of F1 red, rest of flagellum black (Fig. |
Oodera arabica sp. nov. |
– | Body small-sized (4.5−6.5 mm); antenna with only scape or part of it red, rest of antenna black (Fig. |
2 |
2 | Scape with basal two-thirds red and apical third black (Fig. |
Oodera rapuzzii sp. nov. |
– | Scape of antenna entirely red (Fig. |
3 |
3 | Forewing partly infumate (Fig. |
Oodera omanensis sp. nov. |
– | Forewing hyaline (Fig. |
Oodera similis sp. nov. |
Holotype ♀: SAUDI ARABIA, Al-Baha (Al-Mikhwah, Shada Al-Ala Natural Reserve), 29.iii.2017, leg. D. Baiocchi, e.l. Acacia [
(female) (N = 2). See Table
Character | O. arabica sp. nov. (N = 2) | O. omanensis sp. nov. (N = 4) | O. rapuzzii sp. nov. (N = 16) | O. similis sp. nov. (N = 3) |
---|---|---|---|---|
Bdy.l (in mm) | Medium-sized (7.0−7.2) | Small-sized (5.5−6.3) | Small-sized (4.5−5.6) | Small-sized (6.3−6.5) |
Body shape (msn.l/msc.w) | Robust (1.25−1.29) (Fig. |
Robust (1.3−1.34) (Fig. |
Robust to slender (1.33−1.45) (Fig. |
Robust (1.28−1.30) (Fig. |
Head shape in lateral view (hea.h/hea.l) | Rounded (1.34−1.38) | Rounded (1.40−1.44) | Rounded (1.35−1.36) | Rounded (1.37−1.38) |
Eye size (eye.h/hea.h) | Large (0.72−0.74) | Large (0.70−0.75) | Large (0.70−0.72) | Large (about 0.75) |
Corona shape (cor.l/cor.w), its structure |
Thick (3.08−3.60), with interrupted structure (Fig. |
Thick (3.33−3.50), with interrupted structure (Fig. |
Thick (3.25−4.0), with interrupted structure (Fig. |
Thick (3.11−3.40), with interrupted structure (Fig. |
Length and shape of apical segment of maxillary palp | Relatively long, distinctly angulate baso-ventrally, lined ventrally with dense short whitish spines together with scattered long setae (Fig. |
Relatively short, evenly rounded (not angulate) baso-ventrally, without such short spines along its ventral margin (Fig. |
Relatively short, evenly rounded (not angulate) baso-ventrally, without such short spines along its ventral margin (Fig. |
Relatively short, evenly rounded (not angulate) baso-ventrally, without such short spines along its ventral margin (Fig. |
Pronotum length (according to its width), its anterior margin | Wider than long (1.20−1.25×), with anterior margin truncate (Fig. |
As long as wide, with anterior margin truncate (Fig. |
As long as wide, anterior margin rounded (Fig. |
As long as wide, anterior margin truncate (Fig. |
Pronotum broadest part | At midlength (Fig. |
Behind midlength (Fig. |
Slightly behind midlength (Fig. |
Slightly before midlength (Fig. |
Mesoscutellum shape (sct.l/sct.w), its anterior margin | Normal (0.60−0.62), anterior margin hardly convex (Fig. |
Normal (0.62−0.64), anterior margin hardly convex (Fig. |
Normal to slender (0.65− 0.75), anterior margin hardly convex (Fig. |
Normal (0.60−0.72), anterior margin hardly convex (Fig. |
Mesoscutellum sculpture | Entirely lineate (median lines straight) (Fig. |
Almost completely lineate, finely areolate slightly before frenal line (median lines converging) (Fig. |
Lineate on anterior two-thirds and finely areolate on posterior third (median lines converging) (Fig. |
Almost completely lineate, finely areolate slightly before frenal line (median lines converging) (Fig. |
Propodeum size ppd.l/msc.l |
Medium (about 0.15) (Fig. |
Medium (0.13−0.15) (Fig. |
Medium (0.13−0.14) (Fig. |
Large (0.17−0.21) (Fig. |
Profemur shape (fm1.l/fm1.w) |
Robust to medium (1.90−2.08) | Robust to medium (1.92−2.00) | Robust (1.95−2.00) | Robust (1.95−2.00) |
Forewing | Hyaline (Fig. |
Partly slightly infumate (Fig. |
Hyaline (Fig. |
Hyaline (Fig. |
Marginal vein length mav.l/pmv.l |
Short to medium (0.87−0.92) (Fig. |
Medium (0.92−1.00) (Fig. |
Medium (0.95−1.00) (Fig. |
Medium (0.95−1.00) (Fig. |
Metasoma length mts.l/ bdy.l |
Short (0.42−0.43) (Fig. |
Short (about 0.43) (Fig. |
Short to medium (0.44−0.47) (Fig. |
Short (0.42−0.45) (Fig. |
Ovipositor length ovp.l/ mts.l |
Short (1.00−0.13) (Fig. |
Rather long (0.16−0.17) (Fig. |
Rather long (0.16−0.19) (Fig. |
Short (0.13−0.14) (Fig. |
Volsella teeth (male genitalia) | unknown | Four (Fig. |
Four (Fig. |
Five (Fig. |
Female (holotype): Body length 7.2 mm (excluding the ovipositor).
Colour. Head black with strong coppery and green luster on face and faint green tint on gena (Figs
Head. 1.6× as wide as long, hea.w 4.5× eye.d (Fig.
Mesosoma. Pronotum pentagonal, 0.48× as long as mesonotum (Fig.
Forewing
(Fig.
Metasoma
(Fig.
Unknown.
Anthaxia (Haplanthaxia) kneuckeri zabranskyi Bílý, 1995 (Buprestidae).
Saudi Arabia (Al-Baha region).
The new species resembles the Afrotropical species O. mkomaziensis Werner & Peters (Tanzania) and O. namibiensis Werner & Peters (Namibia) in having body medium-sized (7.0−7.2 mm in length), head and mesosoma uniformly black with tinges of dark green and coppery or purple, eye large (eye.h/hea.h 0.72−0.74), corona thick (cor.l/cor.w 3.08−3.60), with structure interrupted and propodeum medium (ppd.l/msc.l 0.15). It differs from O. mkomaziensis in the following: body robust, msn.l/msc.w 1.25−1.29 (in mkomaziensis slender, msn.l/msc.w 1.5); head rounded, 1.34−1.38× as high as long (oval, 1.56× as high as long in mkomaziensis); pronotum pentagonal (oval in mkomaziensis); mesoscutellum entirely lineate (in mkomaziensis lineate in anterior two-thirds, finely areolate in posterior third); metasoma short, 0.42−0.43× as long as body (in mkomaziensis longer, 0.52× as long as body). The new species also differs from O. namibiensis in the following: forewing hyaline (partly infumate in namibiensis); antennal scape and pedicel and basal half of F1 are red, rest of antenna black (scape yellow, darkened apically, rest of antenna black in namibiensis); metasoma short, 0.42−0.43× as long as body length (in namibiensis medium to long, 0.49−0.55× as long as body length).
Named in reference to the country of Saudi Arabia, where the type specimen was collected.
Holotype ♀: OMAN, Dhofar (Rawiyya), 16.i.2018, leg. D. Baiocchi, e.l. Acacia sp. [
Both sexes (N = 4). See Table
A−D Dorsal aspect of pronotum, Holotype A Oodera arabica sp. nov. B Oodera omanensis sp. nov. C Oodera rapuzzii sp. nov. D Oodera similis sp. nov. E−H Mesoscutellum, metanotum and propodeum E Oodera arabica sp. nov. F Oodera omanensis sp. nov. G Oodera rapuzzii sp. nov. H Oodera similis sp. nov. (anterior margin of pronotum indicated in A−D, propodeal lateral ridge indicated in G, H).
Female (holotype): Body length 6.3 mm (excluding the ovipositor).
Colour. Face purple with bluish reflections (Fig.
Head. 1.7× as wide as long, hea.w 4.5× eye.d (Fig.
Mesosoma. Pronotum pentagonal, 0.53× as long as mesonotum (Fig.
Forewing
(Fig.
Metasoma
(Figs
Similar to female. Genitalia (Fig.
Anthaxia (Haplanthaxia) abdita Bílý, 1982, A. (H.) kneuckeri zabranskyi Bílý, 1995 (Buprestidae).
Oman (Dhofar governorate).
The new species, O. omanensis, closely resembles O. circularicollis Werner & Peters, O. formosa (Giraud), and O. niehuisorum Werner & Peters, but differs from them in the following:
O. omanensis vs. O. circularicollis (Morocco). Eye large, 0.70−0.75× as high as head (small, 0.54–0.56× as high as head, in circularicollis); POL 1.4× OOL (as long as OOL in circularicollis); pronotum as long as wide, with anterior margin (collar) truncate (0.91× as long as wide, with collar virtually round in circularicollis); mesoscutellum almost completely lineate, finely areolate slightly before frenal line (lineate in anterior two-thirds, rugulose in posterior third in circularicollis); marginal vein 4× as long as stigmal vein (2.5– 3.53× as long as stigmal vein in circularicollis).
O. omanensis vs. O. formosa (Southern and Central Europe, Russia, Eastern United States, Eastern Canada). Head and mesosoma blue and purplish (dark green and coppery in formosa); scape of antenna red-brown, with black tint apically (yellow, darkening apically in formosa); head width 4.5× eye distance (3.00–3.78× eye distance in formosa); eye 0.75× as height as head (0.55−0.68× as height as head in formosa); corona with structure interrupted (with structure continuous in formosa); pronotum with broadest part behind midlength (with broadest part at midlength in formosa); mesoscutellum almost completely lineate, finely areolate slightly before frenal line (lineate in anterior half to anterior two-thirds, rugulose in posterior half or third in formosa); profemur robust to medium, 1.92–2.00× as long as wide (usually medium to elongated, 1.94–2.33× as long as wide, in formosa).
O. omanensis vs. O. niehuisorum (Egypt and Israel). Forewing partly slightly infumate (hyaline in niehuisorum); corona thick, 3.33−3.50× as long as wide, with structure interrupted (usually medium, 3.8–6.0× as long as wide, with structure continuous in niehuisorum); pronotum with broadest part behind midlength (broadest part before midlength in niehuisorum); mesoscutellum almost completely lineate, finely areolate slightly before frenal line (densely lineate in anterior half to anterior two-thirds, areolate in posterior half or third in niehuisorum); marginal vein medium, 0.92−1.00× as long as postmarginal vein (short, 0.78–0.89× as long as postmarginal vein in niehuisorum).
O. omanensis sp. nov. also resembles the new species O. similis, but differs from it in the following combination of characters: forewing partly infumate, with dark brown to black veins (hyaline in O. similis, with pale brown veins); head with bluish to purplish luster (green and coppery in O. similis); mesoscutellum with green basal half, violet posteriorly (entirely green in O. similis); pronotum distinctly narrow anteriorly, with dense lanceolate whitish setae longitudinally along the middle area, with broadest part behind midlength (distinctly broad anteriorly, with fewer setae along the middle area longitudinally, with broadest part before midlength in O. similis); propodeum medium, ppd.l/msc.l 0.13–15 (large, ppd.l/msc.l 0.17−0.21, in O. similis); volsella of male genitalia with four sharp teeth, aedeagus with parallel outer sides (with five teeth, aedeagus with strongly convex outer margins in O. similis).
Named in reference to the country of Oman, where the type specimen was collected.
Holotype ♀: SAUDI ARABIA, Al-Baha (Wadi Tourabah), 12.iv.2016, leg. P. Rapuzzi, e.l. Acacia [
Both sexes (N = 16). See Table
Female (holotype): Body length 5.6mm (excluding the ovipositor).
Colour.
Head black on corona, scrobal depression and occiput, coppery on face (lower face with green luster), blue on gena (Figs
Head. 1.66× as wide as long (Fig.
Mesosoma. Pronotum pentagonal, 0.5× as long as mesonotum (Fig.
Forewing
(Fig.
Metasoma
(Fig.
Similar to female but slightly darker in colour. Genitalia (Fig.
Anthaxia (Haplanthaxia) abdita Bílý, 1982, A. (H.) cf. angustipennis (Klug, 1829), A. (H.) kneuckeri zabranskyi Bílý, 1995, A. (H.) marginifera dhofarica Bílý, 2003, A. (H.) wittmeri Bílý, 1979; Chalcogenia halperini arabica Bílý, 2008 (Buprestidae).
Oman (Dhofar governorate); Saudi Arabia (Al-Baha and Asir regions).
The new species closely resembles O. formosa (Giraud), but differs from it in the following combination of characters: wing hyaline (partly infumate in O. formosa); corona thick, 3.25−4.00× as long as wide, with structure interrupted (thick to medium, 3.20−6.67, structure continuous in O. formosa); metasomal length short to medium, 0.44−0.47× as long as body (short to long, 0.43−0.55 in O. formosa); ovipositor length rather long, 0.16−0.19× as long as metasoma (usually short, 0.09−0.17 in O. formosa); head and mesosoma with strong blue colour in some parts (never with blue evident in O. formosa).
This species is named in honour of Pierpaolo Rapuzzi, who participated in the breeding of this species from the dead wood of Acacia sp.
Holotype ♀: SAUDI ARABIA, Riyadh (Wadi Al Hesiyah, 40 km NW Riyadh), 30.iv.2017, leg. D. Baiocchi, e.l. Acacia sp. [
Both sexes (N = 3). See Table
Female (holotype): Body length 6.3 mm (excluding the ovipositor).
Colour
. Head black with slight blue-green tint on corona, scrobal depression and occiput (Figs
Head. 1.7× as wide as long, hea.w 4.2× eye.d (Fig.
Mesosoma. Pronotum pentagonal, 0.5× as long as mesonotum (Fig.
Forewing
(Fig.
Metasoma
(Fig.
Similar to female except for second and third metasomal sternites with blue reflection. Genitalia (Fig.
Anthaxia (Haplanthaxia) abdita Bílý, 1982, A. (H.) kneuckeri zabranskyi Bílý, 1995 (Buprestidae).
Oman (Al-Dakhiliyah governorate); Saudi Arabia (Riyadh region).
This species resembles the Oriental species O. srilankiensis Werner & Peters 2018 (Sri Lanka) in having the body robust; antennal scape red-brown, rest of antenna black; flagellum about 1.3× as long as head width; pronotum about 0.5× as long as mesonotum; pronotum pentagonal, with broadest part before midlength; propodeum large; forewing hyaline; marginal vein medium; ovipositor distinctly shorter than metasoma (less than 0.25× metasomal length). However, it differs from O. srilankiensis in the following combination of characters: body size larger, 6.30−6.5 mm in length (4.00−5.75 mm in srilankiensis); head and mesosoma black with metallic green, blue, purple and coppery in different parts (dark blue to blue-green in srilankiensis); head 1.70× as wide as long (1.28−1.48× in srilankiensis); head width 4.20× eye distance (3.44−3.85× in srilankiensis); corona 3.10−3.40× as long as wide, with structure interrupted (3.70−4.75× as long as wide, with structure continuous in srilankiensis); mesoscutellum almost entirely lineate, finely areolate slightly before frenal line (meoscutellum lineate in anterior third to half, rugulose in posterior half or two-thirds in srilankiensis); profemur robust, 1.95−2.00× as long as wide (usually medium to elongated, 1.98–2.33× as long as wide, in srilankiensis).
The new species resembles also the Palaearctic species, O. niehuisorum Werner & Peters, 2018 in having the small body size; wings hyaline; eye large; metasoma short; pronotum pentagonal, with broadest part before midlength. However, it differs from O. niehuisorum in the following combination of characters: head with some blue (never with blue in niehuisorum); antenna with scape red-brown, rest dark brown to black (scape and pedicel (except apex of pedicel) yellow, rest dark brown to black in niehuisorum); corona thick, 3.10−3.40× as long as wide, with structure interrupted (medium, 3.80−6.00× as long as wide, with structure continuous); mesoscutellum normal, sct.l/sct.w 0.60−0.72 (normal to slender in niehuisorum, 0.55−0.85); propodeum large, ppd. l/msc.l 0.17−0.21 (medium to large in niehuisorum, 0.12−2.15); mesoscutellum completely lineate, slightly finely areolate before frenal line (densely lineate in anterior half to anterior two-thirds, and areolate on posterior half or third in niehuisorum); profemur robust, fm1.l/fm1.w 1.95−2.00 (robust to medium in niehuisorum, 1.82−2.15); marginal vein medium, mav.l/pmv.l 1.95−1.00 (short in niehuisorum, 0.78−0.89); ovipositor short, ovp.l/mts.l 0.13−0.14 (short to rather long in niehuisorum, 0.14−0.18).
From the Latin, refers to the similarity of this species with O. srilankiensis Werner & Peters.
In the present study, four new species of the genus Oodera reared from dead Acacia trees are collected from different regions of Oman and Saudi Arabia (new locality record), with the help of beetle specialists. The study is based on morphological data of 25 specimens (13 females and 12 males). An illustrated key to Arabian species and detailed description of the new species are provided, in addition to analysis with similar valid species. Intraspecific variation is found to be slight as the number of the collected specimens is relatively small because of the rarity of this genus.
The current study is the second contribution to the study of this beautiful and interesting group of Chalcidoidea, covering a new area (Arabia) that was not considered in previous studies (example
The world species of Oodera was first revised by
The main observation emerging from our study, is the strong correlation of Oodera fauna with the intermediate biogeographical situation of the study area. Almost, all of the studied specimens were collected from southwestern and southeastern parts of Arabia, that are exclusively Afrotropical (
However, because of the biodiversity richness of Arabia, due to its rich floristic diversity, more species of this genus are expected to occur. Therefore, further collections and studies are still needed to clarify the distribution of this genus in other parts of this area.
Sincere gratitude to Daniele Baiocchi and Pierpaolo Rapuzzi (Roma, Italy) for providing us with the Oodera specimens reared on xylophagous beetle larvae attacking Acacia trees. Also, many thanks to Gary Gibson and Jennifer Werner (reviewers) for their valuable comments and suggestions to improve the manuscript. The authors are thankful to Mahmoud S. Abdel-Dayem (