Stuttgarter Beiträge zur Naturkunde Serie A (Biologie)

Herausgeber:

Staatliches Museum für Naturkunde, Rosenstein 1, D-70191 Stuttgart

Stuttgarter Beitr. Naturk. | Ser. A | Nr.679 | 95S.,8 Abb. Stuttgart, 10. V. 2005 5 5

A new species of the genus Phebellia Robineau-Desvoidy (Diptera: Tachinidae) from Finland

CHRISTER BERGSTROM

Abstract

A new tachinid species, Phebellia margaretae n.sp., is described from Finland. It is near to the Palaearctic species P. glauca (Meigen, 1824), P. glaucoides Herting, 1961 and P laxifrons Shima, 1981. Its position in the genus 1s discussed.

Keywords: Tachinidae, new species, Finland, Phebellia.

Zusammenfassung

Eine neue Raupenfliegen-Art, Phebellia margaretae n.sp., aus Finnland wird beschrieben. Die neue Art steht den paläarktischen Arten P glauca (Meigen, 1824), P. glancoides Herting, 1961 und P laxifrons Shima, 1981 nahe. Ihre Stellung in der Gattung wird diskutiert.

Contents Ae rINCCOUUCTLO INS ee Ngee N tT MERE ah Nas SL ial a Re 1 Ngee nt RT LE AT 1 De Materials and merhädst ne IS tn 2 3. Description of Phebellia margaretaen.: sp. su es saeeee betes nen en nenn 2 4. Difterences:to other species:ot Phebellia vu... 2... 0 vu anne ee 2 BMAIVGLEL CIC CS yi skrades & seinen Anis nes en Papi canta. tig Gy sh oe Eee Beer ge BE ee 8

1 Introduction

The genus Phebellia Robineau-Desvoidy, 1846 (sensu MesnıL 1955; HERTING 1961, 1984; SHima 1981, 1982) is mainly distributed in the Nearctic and Palaearctic regions with a small representation also in the Oriental region. Up to the present 19 species of Phebellia (including Prooppia) are recorded from the Palaearctic region (HERTING 1984). Eight species are assigned to the genus Phebellia in the Nearctic re- gion, following a transfer of three species to the re-established genus Prooppia (O’Hara & Woop 2004). In this paper a new species, Phebellia margaretae n. sp., is described from Finland.

The genus Phebellia Robineau-Desvoidy belongs to the large and multiform tribe Eryciini (HERTING 1984, O’Hara & Woop 2004). Most Eryciini are known to de-

2 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 679

posit incubated eggs directly on the host integument, but some, e.g. Aplomya Robineau-Desvoidy, 1830 and several species previously in Phebellia (but recently transferred to the re-established genus Prooppia Townsend, 1926 by Woop 1987), deposit unembryonated eggs on the host. Host-records are only available for a mi- nority of the species of Phebellia but indicate that members of this genus parasitize larvae of Cimbicidae (Hymenoptera), Noctuidae and Notodontidae (Lepidoptera) (HERTING 1960, TsCHORSNIG & HERTING 1994, O’HARA & Woop 2004).

At least the Palaearctic Phebellia are recognized by the following diagnosis. Head: Fronto-orbital plate in male without proclinate outer orbital setae; 2 reclinate inner orbital setae, posteriormost seta smaller; ocellar setae strong and proclinate; parafa- cial narrowing below, at its narrowest point narrower than flagellomere 1; eyes densely haired. Thorax: Prosternum haired; proepisternum bare; postpronotum with 3 basal setae arranged in an obtuse triangle, and with 2 smaller anterior setae; katepisternum with 3 setae; katepimeron bare, or with at most three or four hairs on anterior half; first postsutural supra-alar seta longer and stouter than the notopleur- al setae; lateral scutellar setae 0.9-1.1 times as long as basal setae; vein R445 with 1-2 small setae basally. Abdomen: Mid-dorsal depression on syntergite 1+2 extending back to hind margin; tergite 2 with 1-2 pairs of median marginal setae.

Acknowledgements

This paper was prepared within the Swedish Taxonomy Initiative, by contract with Art- Databanken (The Swedish Species Information Centre) SLU (Swedish University of Agri- culture Sciences), Uppsala. The author is grateful to Dr. HANs-PETER TscHoßsnIG (Stuttgart) for the loan of a specimen of Phebellia laxifrons and for the critical revision of the manuscript, Dr. JOACHIM ZIEGLER (Berlin) for the critical revision of the manuscript, Dr. JAmEs O? Hara (Ottawa) for the critical revision of the manuscript and improvement of the English, and Mr. Kart JitG (Kungsängen) for valuable help preparing the figures. Thanks are extended to Dr. Past SIHVONEN and Dr. PEKKA VILKAMAA from the Zoological Museum, University of Helsinki, for their help during my visit to Helsinki in spring 2004.

2 Materials and methods

The Phebellia specimens studied for this paper are deposited in the following institutions and private collections: Zoological Museum, University of Helsinki; Swedish Museum of Natural History [= Naturhistoriska Riksmuseet], Department of Entomology, Stockholm; Staatliches Museum für Naturkunde, Stuttgart; private collection of CHRISTER BERGSTROM, Uppsala; private collection of ROGER ENGELMARK, Umea.

The dissection of the male and female terminalia was performed following the method de- scribed by ANDERSEN (1996). The dissected terminalia are preserved in glycerol in a small plastic tube pinned together with the specimen.

Terminology of external morphology and terminalia follows MCALPINE (1981). Measure- ments and ratios of head follow TscHoRsNic & HERTING (1994),

3 Description of Phebellia margaretae n.sp.

Material

Holotype: d, Finland, Prov. Ostrobottnia borealis, S part, Hailuoto, Kirkkolahti 16. VII.1947, “collected on a shore with cowbane Cicuta virosa”, leg. R. Frey [851].

Paratypes: 16, Finland, Prov. Tavastia borealis, Saarijärvi, leg. WOLDSTEDT. 1 2, same data as holotype, leg. R. Frey [844]. 1 2, Savonia borealis, Idensalmi, leg. LUNDsTROM. - 2 2¢, Savonia borealis, Tuovilanlaks (= Maanika), leg. PALMEN.

Holotype and paratypes are deposited in the Zoological Museum, Division of Entomolo- gy, Helsinki.

BERGSTRÖM, NEW SPECIES OF PHEBELLIA FROM FINLAND 3

Figs. 1-2. Phebellia margaretae n.sp., male holotype, head in lateral (1) and dorsal (2) view. - Scales: 1 mm.

The numbers in square brackets refer to Frey’s notebook where the quoted information was found.

Etymology

The new Phebellia species is dedicated to Mrs. MARGARETA ROMAN (Uppsala, Sweden), the wife of the author.

Description

Male (statements within square brackets refer to male paratype):

Colour and pruinosity: Body black; legs black or brownish black; scutellum nar- rowly reddish brown at apex. Frontal vitta brown; face at mouth margin, anterior portion of parafacial, and gena (except the genal dilation) reddish brown in frontal view. Antenna black; arista reddish yellow in basal 2/5. Palpus reddish yellow in api- cal !/>, gradually darkened towards base. Calypters white, inner margin of lower ca- lypter near scutellum somewhat darkened. Tegula black, basicosta brown. Head and thorax covered with light greyish white pruinescence; scutum with five dark postsu- tural longitudinal stripes; presutural area with four dark stripes, middle one is miss- ing, the lateral ones broadly continuing at level of the strong posthumeral seta. Ab- dominal tergites with basal bands of greyish white pruinescence covering about 2/3 of tergites 3, 4 and 5.

4 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 679

Head (Figs. 1-2): Eyes haired. Length of frons slightly longer than length of face. Frons at its narrowest point 0.73 [0.65] times as wide as an eye in dorsal view. Inter- frontal area at midpoint slightly narrower than corresponding parafrontal area. In- ner vertical seta 0.6 of eye-height; outer vertical seta strong, about 0.6 times as long as inner vertical seta. Ocellar setae strong and proclinate. A row of 11-13 frontal se- tae descending to level of apex of pedicel; 2 reclinate inner orbital setae, posterior se- ta smaller. Parafrontal outside the frontal setae with numerous long hairs, at least as long as !/3 the length of the strong frontal setae; no hairs [one hair] descending be- low level of lowest frontal seta. Parafacial strongly narrowing below, at its narrow- est point approximately !/4 as wide as flagellomere 1, bare. Facial ridge with 6-7 small setae and some additional setulae in its lower !/4. Back of head covered with white hairs, with numerous small black setae directly behind the postocular row. Antenna black; flagellomere 1 evenly curved at apex and at inner margin, 2.1 times as long as maximum width, 2.0 [2.1] times as long as pedicel. Sclerotized part of pre- mentum approximately 2 times as long as its diameter. Palpus widened and flattened apically, slightly longer than flagellomere 1, with dense and short hairs.

Thorax: Prosternum hairy, proepisternum bare. Right postpronotum with 3 basal setae arranged in an obtuse triangle, and 2 smaller anterior setae; left postpronotum with 4 basal setae (one additional outer seta) also arranged in an obtuse triangle, and 2 smaller anterior setae. Scutum with 3+3 pairs of acrostichal setae, 3+4 pairs of dor- socentral setae and O[-1] + 3 pairs of intra-alar setae. First postsutural supra-alar se- ta strong. Katepisternum with 3 setae. Katepimeron with some hairs on anterior half. Anepimeral seta strong, as long as the smallest katepisternal seta. Scutellum with strong basal, lateral and subapical setae and with strong crossed horizontal apical se- tae; lateral setae subequal with the basal setae. Dorsal surface of scutellum with the normal pair of discal setae.

Wing: Second costal sector bare ventrally. Costal spine weakly differentiated. Vein R445 with 1-2 small setae basally. Fourth costal section 1.6 [1.4] times as long as sixth costal section. Bend of M without an appendage, apical section of M slightly con- cave. Section of M between crossvein dm-cu and bend 0.88 [0.74] times the distance between bend of M and margin of wing. Last section of CuA, shorter than crossvein dm-cu.

Legs: Claws and pulvilli as long as fifth tarsal segment. Fore tibia with 2 posterior setae and a proximal row of 6-7 anterodorsal setae. Mid tibia with 3 anterodorsal se- tae, 2-3 posterior setae; one strong and an additional much weaker ventral seta. Hind tibia with an irregular row of 4-5 strong anterodorsal setae, and some much weaker setulae; 3-4 posterodorsal setae, 2-3 anteroventral setae and 2 dorsal preapical setae; preapical posteroventral seta missing. Hind coxa bare on posterior margin.

Abdomen: Mid-dorsal depression on syntergite 1+2 extending back to hind mar- gin of that segment. Tergite 2 with 1(2) [2] pairs and tergite 3 with 2 pairs of median marginal setae [in male paratype almost a complete row of marginal setae]; tergites 4 and 5 each with a complete row of marginal setae. Tergite 3 with 6 (8) weak and scat- tered median discal setae; tergite 4 with an irregular row of 8 (10) discal setae, dor- solaterally with some additional suberect hairs. Tergite 5 with an irregular row of rather strong discal setae. Tergites 4 and 5 ventrally without patches of recumbent hairs.

Genitalia (Figs. 3-6): Fifth sternite 1.5 times as wide as long, posterior lobe with dense and rather strong hairs; sixth tergite wide and narrow, entire and without

BERGSTRÖM, NEW SPECIES OF PHEBELLIA FROM FINLAND 5

Figs. 3-6. Phebellia margaretae n.sp., male holotype. 3-4. Epandrium, cerci and surstyli in lateral (3) and caudal (4) view. 5. Sternite 5 in ventral view. 6. Aedeagus, pregonite, post- gonite, aedeagal apodeme and ejaculatory apodeme in lateral view. Scales: 0.25 mm.

hairs; cerci in dorsal view broad, only approximately 2 times as long as broad at mid- point, evenly narrowed to apex, narrowly separated in about apical 3/s, apical por- tion of inner side of each cercus strongly serrate, in lateral view evenly curved ven- trally; surstylus clearly fused with epandrium, shorter than cerci, in lateral view

6 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 679

Figs. 7-8. Phebellia margaretae n.sp., female paratype, ovipositor ın ventral (7) and lateral (8) view. Scales: 0.25 mm.

broad and densely covered with black hairs in apical half; pregonite long, with hairs along its posterior margin; postgonite rather short; epiphallus broad; ventral plate of distiphallus with distinct spinules in the proximal part, not expanded laterally.

Female, differing from male as follows:

Parafrontal with 2 proclinate outer orbital setae. Abdominal tergites with basal bands of pruinescence covering about the dorsal 3/, of tergites 3 and 4, and the basal 2/3 of tergite 5. Frons broader, at its narrowest point 0.77-0.88 times as wide as an eye in dorsal view. First flagellomere 1.7-1.9 times as long as pedicel. Claws and pulvilli slightly shorter than fifth tarsal segment, which is about half as long as in male. Mid tibia with 4-5 anterodorsal setae.

Genitalia (Figs. 7-8): Uterus present; tergite 6 divided longitudinally into two hemitergites, densely covered with hairs on its posterior portion, the longest hairs along the posterior margin and about 2 times as long as the tergite; sternite 6 with less dense and shorter hairs than tergite 6; tergite 7 divided into two hemitergites

BERGSTRÖM, NEW SPECIES OF PHEBELLIA FROM FINLAND 7

about 1.4 times as long as tergite 6; sternite 7 slightly shorter than sternite 6, basal margin weakly sclerotized but without incision, apex without rounded free distal portion; 6% spiracle in intersegmental membrane between tergite 6 and sternite 6, 7th spiracle close to lower posterior margin of tergite 6; sternite 8 absent; epiproct weakly sclerotized, without setae; hypoproct with posteriorly directed small setae; cercus long; intersegmental membrane ventrally between abdominal segment 7 and 8 broadly and densely covered with microtrichiae, and with a strong seta in one of two dissected females.

4 Differences to other species of Phebellia

The genus Phebellia, in the restricted sense of Woop (1987), comprises as far as investigated species with a number of common characters: Palpus yellow or at least reddish yellow in the apical half; egg planoconvex, embryonated in the uterus; dis- tiphallus of the aedeagus not expanded laterally. The species-groups recognized by SHIMA (1982) were based on the structures of the male and female terminalia and in- cluded - apart from four new species from Japan also some widely distributed Palaearctic species. P margaretae n.sp. is clearly assignable to the glauca-subgroup of SHuıma (1982). This subgroup includes two widely distributed Palaearctic species, P. glauca (Meigen, 1824) and P. glaucoides Herting, 1961, and one Japanese species, P. laxifrons Shima, 1981. They share the following structures of the male and female genitalia: Male: Tergite 6 entire; surstylus fused with epandrium. Female: Sternite 7 normal, without rounded free distal portion; tergite 8 absent; intersegmental mem- brane between abdominal segments 7 and 8 broadly and densely covered with mi- crotrichiae. Compared with the other members of this subgroup, P. margaretae n.sp. most closely resembles the Japanese species Phebellia laxifrons Shima, 1981.

P. margaretae n. sp. can, apart from the male and female terminalia, be recognized among the other members of the glauca-subgroup by the combination of a number of characters: Scutellum black or sometimes narrowly reddish brown at apex; palpus usually brown with a reddish yellow tip; section of vein M between dm-cu and the bend 0.7-0.9 times as long as the distance from the bend to the wing margin; tibia black or brownish black. d: Frons 0.65-0.73 times as wide as an eye, with strong outer vertical setae; length of frons longer than length of face; fore claws and pulvil- li as long as fifth tarsomere; tergites 3 and 4 with scattered discal setae, sometimes an irregular row of discal setae on tergite 4.

Males of P margaretae n.sp. can be added to the Japanese species of Phebellia Robineau-Desvoidy by modifying couplet 7 of the key by SHıma (1982: 72):

7 6: Fore claws and pullvilli shorter than or at most as long as 5‘ tarsomere; outer vertical

SELASTLONS Wy Sons) eer ER Be ned BORA EEE nie saves OY ir Reh RUN lee ad ia, 7b 6: Fore claws and pullvilli distinctly longer than 5th tarsomere; outer vertical seta at most very weakly developed ee fe tree ate er a, Od BE 8

7b Frons 0.65-0.73 times as wide as an eye; length of frons longer than length of face; tibia black or brownish black; fore claws and pulvilli as long as 5!" tarsomere; tergites 3 and 4 with scattered discal setae. Genitalia (Figs. 3-6): Cerci and surstylus distinctly stouter than in Jaxifrons; cerci in dorsal view broad to about middle and then evenly narrowed to apex, distance from base of suture to apex about 2 times the width of cerci at middle, somewhat broadly separated from each other in apical 2/3, in lateral view broad in its whole length and towards apex gradually a little more curved ventrally. Surstylus in lateral view

8 STUTTGARTER BEITRÄGE ZUR NATURKUNDE Ser. A, Nr. 679

at middle about 2 times as broad as cercus at that point, strongly narrowed to apex. Dis- tiphallus with apical portion not distinctly curved ventrally. ........ P. margaretae n. sp. Frons about as wide as an eye; length of frons shorter than length of face; tibia reddish yel- low; fore claws and pulvilli about !/2 as long as 5‘ tarsomere; tergites 3 and 4 without dis- cal setae. Genitalia (fig. 1 in SHmma 1981: 56): Cerci and surstylus more slender than in P margaretae; cerci in dorsal view evenly narrowed to apex, distance from base of suture to apex about 3 times the width of cerci at middle, weakly separated from each other in apical 3/5, in lateral view almost equally broad in its whole length and weakly curved ventrally. Surstylus in lateral view at middle about 1.5 times as broad as cercus at that point, weakly narrowed to apex. Distiphallus in apical portion distinctly curved ventrally. ............

Ct Bee RETO Pe UnE MORE DER HOSE Ms HERZENS 208 eh Matus Oe hee P. laxifrons Shima

The new species keys out from other West Palaearctic species by modifying cou- plet 8 of the key by TscHorsnic & HERTING (1994: 51):

8 Section of wing vein M between dm-cu and the bend 1.7-2.2 times as long as the distance from the bend to the wing margin. Mid tibia with 2 ad setae (seldom 3). The three strong postpronotal setae form an angle of 90-110°. Black longitudinal stripes clearly defined on the presutural scutum. Female with 5 tergite 1.20-1.35 times as long as tergite 4. .....

oe HE Ua en ae een beat ond on eu amaaeyitiyensn a coms P. stulta Zetterstedt

Section of vein M between dm-cu and the bend 0.7-1.7 times as long as the distance from the bend to the wing margin. Mid tibia almost always with 3-5 ad setae. The three strong postpronotal setae form an angle of 120-150°. Thoracic stripes variable. - Female with 5 tergite 1:0-1.1 times as long as tergite 4.05 nn nn el ey ehe cee eee 8a

8a Scutellum black or sometimes narrowly reddish brown at apex. Frons in male with strong outer vertical setae. Palpus usually brown with a light tip. Section of vein M between dm- cu and the bend 0.7-0.9 times as long as the distance from the bend to the wing margin. ..

bat a A a ees Be her cl aM, oot Ae EEE OR an Br: P. margaretae n. sp.

Scutellum reddish brown in more than apical third. Frons in male without differentiated outer vertical setae. Palpus yellow. Section of vein M between dm-cu and the bend 1.1-1.7 times as long as the distance from the bend to the wing margin ..........-...000000% 9

5 References

ANDERSEN, S. (1996): The Siphonini (Diptera: Tachinidae) of Europe Fauna Entomologica Scandinavica 33: 148 pp.

Herring, B. (1960): Biologie der westpaläarktischen Raupenfliegen (Dipt., Tachinidae). -

Monographien zur angewandten Entomologie 16: 188 pp.

HErTING, B. (1961): Beiträge zur Kenntnis der europäischen Raupenfliegen (Dipt., Tachi-

nidae). Stuttgarter Beiträge zur Naturkunde 65: 1-12.

HERTING, B. (1984): Catalogue of Palearctic Tachinidae (Diptera). Stuttgarter Beiträge zur

Naturkunde, Serie A (Biologie) 369: 228 pp.

MCALPINE, J. F. (1981): Morphology and terminology - adults. In: MCALPINE, J. F. et al. (eds.): Manual of Nearctic Diptera 1 (Agriculture Canada Monograph 27), pp. 9-63; Ottawa (Canadian Government Publishing Centre).

MESsNIL, L. P. (1955): Larvaevorinae (Tachininae). In: LINDNER, E. (ed.): Die Fliegen der paläarktischen Region 8 (64g), pp. 417-464; Stuttgart (Schweizerbart).

O’Hara, J. E. & Woon, D. M. (2004): Catalogue of the Tachinidae (Diptera) of America north of Mexico. - Memoirs on Entomology, international 18: 410 pp.

SHIMA, H. (1981): A study of the genus Phebellia Robineau-Desvoidy from Japan (Diptera: Tachinidae). I. Description of new species. Bulletin of the Kitakyushu Museum of Natural History 3: 53-67.

SHIMA, H. (1982): A study of the genus Phebellia Robineau-Desvoidy from Japan (Diptera: Tachinidae). II. Redescription and species-grouping. Bulletin of the Kitakyushu Mu- seum of Natural History 4: 57-75.

TscHorsnic, H.-P. & Herring, B. (1994): Die Raupenfliegen (Diptera: Tachinidae) Mit- teleuropas: Bestimmungstabellen und Angaben zur Verbreitung und Okologie der einzelnen Arten. Stuttgarter Beiträge zur Naturkunde, Serie A (Biologie) 506: 170 pp.

BERGSTRÖM, NEW SPECIES OF PHEBELLIA FROM FINLAND 9

Woon, D. M. (1987): 110. Tachinidae. - In: MCALPINE, J. F. et al. (eds.): Manual of Nearctic

Diptera 2 (Agriculture Canada Monograph 28), pp. 1193-1269; Ottawa (Canadian Government Publishing Centre).

Author’s address:

CHRISTER BERGSTROM, Saves vag 10, 752 63 Uppsala, Sweden; e-mail: christer.bergstrom@zeta.telenordia.se

Manuscript received: 3.1.2005, accepted: 24.11.2005.

ISSN 0341-0145

Autoren-Richtlinien: http://www.naturkundemuseum-bw.de/stuttgart/schriften Schriftleitung: Dr. Hans-Peter Tschorsnig, Rosenstein 1, 70191 Stuttgart Gesamtherstellung: Gulde-Druck, 72072 Tübingen