Exomala (Neoblitopertha) succincta ( CASTELNAU , 1840)

Rössner, Eckehard, Zorn, Carsten & Branco, Tristao, 2009, Exomala (Neoblitopertha) campestris (L, 1804) and Exomala (Neoblitopertha) succincta (C, 1840): two distinct European species (Coleoptera, Scarabaeidae, Rutelinae, Anomalini), Beiträge Zur Entomologie = Contributions to Entomology 59 (1), pp. 175-189 : 180-186

Exomala (Neoblitopertha) succincta ( CASTELNAU, 1840) , stat. rest.

Anisoplia succincta CASTELNAU, 1840: 151 (type locality: Austria and Italy)

Phyllopertha campestris var. abbreviata MULSANT, 1842: 496 (type locality: Lyon), syn. nov.

Phyllopertha campestris var. cruciata MULSANT, 1842: 496 (type locality: Lyon), syn. nov.

Phyllopertha campestris var. maculata MULSANT, 1842: 496 (type locality: Lyon), syn. nov.

Phyllopertha campestris var. pauperata MULSANT, 1842: 496 (type locality: Lyon), syn. nov.

Examined material:

France: „ Savoie , [illegible:] Voison“ (1 , MHNG) . – „ Frankreich “ (1 , MNHB) . – „ Lyon “ (3, MNHB) . – „ Basses Alpes , St. Andire, Juni 1966 “ (3, 6, CJS). – „Gall. mer.“ (3, 1 , coll. Fehse, SMTD) .

Italy: „ Tirol mer. | 24645“ (3 , historical collection, MNHB) . – „ Südtirol , VI.1931, leg. Schadewald “ (2 Ex., CAW). – „Tirol | 24645“ (2, 1 , historical collection, MNHB) . – „ Tyrol. Stentz. | 24645“ (1 , historical collection, MNHB) . – „24645“ (5 , 4 , historical collection, MNHB). – „ Trient, Schmidt “ (1 , MNHB) . – „ Trient | 89946 | Coll. Thieme “ (1 , historical collection, MNHB) . – „ Verona “ (3 , 1 , MNHB) . – „ Toscana, [illegible:] Sinca | 69“ (1 , MNHB) . – „ Bozen “ (3 , MNHB) . – „ Bozen | Kollektion Dr. Fuchs “ (3 , NSMW) . – „ Atzwang [Südtirol, zu Renon ] 7.1910, g. W. Maus “ (1 , NSMW) .- „ Emilia , Fiumalbo, VI.[18]94, A. Fiori | 110616“ (3 , MNHB) . – „ Emilia, Reno , 6.VI.[18]90, A. Fiori | 110617“ (1 , MNHB) . – „ Emilia, Rimini , 6. [19]11, A. Fiori | 110618“ (1 , MNHB) . – „ Piemonte, [illegible:] Garearel, VI.[18]90, A. Fiori | 110619“ (1 , MNHB) . – „ Trient , [leg.] Kirsch“ (2, SMTD) . – „ Tirol , [leg.] Märkel“ (3, 3 , SMTD) . – „ Bozen , VI.1903 [leg.] Dr. Noesske “ (2 , 2 , SMTD) . – „ Italia , [leg.] Märkel“ (2, SMTD) . – „ Tirolis mer. | alte Sammlung“ (1 , ZSM) . – „ Bozen | Sammlung Cl. Müller “ (2, ZSM) . – „ Bozen 4.6.[18]84 J | Sammlung J. Daniel “ (2 , 2 , ZSM) . – ohne Fundortetiketten : 4 , 5 , ZSM. – „Italien, Meeralpen, Entraque> 700 m, 29.-31.V.1992, leg. Zorn “ (2 , CCZ) .

Switzerland: „Helvet. | 24645“ (1 , historical collection, MNHB). – „Helvetia | alte Sammlung“ (1 , ZSM).

[We have also seen the following specimens that we believe were wrongly labelled: France: „ Bordeaux | ex museo W. Weber “ (1 , MNHB). – Spain: „Spanien, Malaga “ (1 , MNHB). – Germany: „Germania, Erlangen “ (5 , MNHB). – Bulgaria: „ Bulgaria oc., Kamtschia, 22.VI.1985, leg. F. Wolf “ (1 , CER).] – Russia: „Ross. m. | Sammlung Cl. Müller “ (1 , ZSM) .]

Figs 23-34: Male genitalia. – 23, 25, 27, 29, 31, 33: parameres in dorsal view. – 24, 26, 28, 30, 32, 34: parameres in ventral view and ventral plate. – 23-26: Exomala campestris . – 23, 24: [ Spain] Ponferrada ( SMTD) . – 25, 26: [ France] Cauterets, Hautes Pyrenées ( SMNS) . – 27-30: Exomala succincta . – 27, 28: [ Italia] Tirol ( ZMHUB) . – 29, 30: [ Italia] Bozen ( SMTD) . – 31, 32: Exomala adriatica [ Albania] Valona ( SMTD) . – 33, 34: Exomala bileki [ Turkey] Buglan Gecidi ( CER) .

Description:

Head, pronotum and scutellum black, shining, often with weak metallic lustre. Elytra yellowish brown, moderately shining; dark marks almost always well developed ( figs 17-22 ); usually more or less broadly blackened along the periphery, on the umbone and on the area around the scutellum, and with a transversal black band.

Clypeus broadly rectangular; sides parallel; fore edge reflexed and weakly convex; anterior angles rounded; punctation transversely rugose; clypeus sparsely, forehead and vertex densely covered with erect, light-coloured setae; with very dense, rugose punctation.

Antennal club rather short, outer face of last antennomere distinctly convex.

Pronotum laterally with an obtuse, blunt angle ( fig. 10 ); basal margin disappearing before the postero-lateral angles; base straight in front of scutellum ( fig. 10 ); with dense transverse, somewhat rugose punctation and long, erect light-coloured setae.

Scutellum ( fig. 10 ) broadly semicircular; densely punctate, setose.

Elytra ( figs 17-22 ) broadest approximately in the middle; odd intervals feebly convex and weakly setose; all intervals with more or less dinstinct transverse, rugose punctation.

Pygidium densely transversely rugose; with moderately dense, long, light-coloured pilosity.

Ventral face and femora with rather long light-coloured setae.

Inner claw of fore tarsi in males ( fig. 9 ) relatively long, approximately half as long as last tarsal joint.

Distribution:

In fig. 23 the locality data of the examined material are mapped. According to our data and recent literature, the distribution patterns of E. campestris and E. succincta can be described as follows.

The distribution area of Exomala campestris lies roughly in the triangle between the Pyrenees, the Cantabric mountains and the Iberian Central sierras (Sistema Central). In the south the species reaches Madrid and Guadalajara ( BÁGUENA 1967: 435, sub: Blitopertha campestris ). In the north its distribution area includes the French Pyrenees and the lowlands of Landes and Médoc up to the Atlantic Ocean.

In general terms E. succincta is a species of the southern Alp valleys, distributed from Lyon in the west to Slovenia in the east. In Italy its distribution area does also include the northern Apennines (Emilia-Romagna, Toscana).

Therefore, according to the available data, E. campestris and E. succincta show an allopatric distribution, their respective geographic ranges are neither overlapping nor connected. They are separated by the Rhône valley, the Massif Central and the Cévennes in central France.

Differential diagnosis:

The differences on which the very similar species E. campestris and E. succincta can be separated are given in the table below. character E. campestris E. succincta inner claw of shorter than half the length of last as long as half the length of last tarsal joint fore tarsi () tarsal joint ( fig. 4 ) ( fig. 9 ) body length 7.0-9.5 mm (mean 8.48 mm) ( fig. 6, 8.2-10.4 mm (mean 9.13 mm) ( fig. 36 , table 2)

table 2) antennal club elongate, outer face of last antenno- less elongate, outer face of last antennomere () mere weakly convex distinctly convex pronotum sides evenly rounded ( fig. 5 ); sides with an obtuse, blunt angle ( fig. 10 );

basal margin reaching postero-lateral basal margin disappearing before the postero-

angles, sometimes very faint there; lateral angles; base infront of scutellum straight

base in front of scutellum evenly ( fig. 10 )

rounded, convex ( fig. 5 ) scutellum mostly narrow and elongate, rarely wide, semicircular ( fig. 10 )

semicircular ( fig. 5 ) elytra dark marks usually reduced, dark marks, including the transversal band, almost

transversal band rarely distinct always well developed ( figs 17-22 ) [cf. ROBERT

( figs 11-16 ) (1992): fig. 2 , sub: Blitopertha campestris LATR. ] male genitalia sides of parameres straight in dorsal sides of parameres sinuate in dorsal view ( fig. 6 );

view ( fig. 1 ); each paramere broadened before the apex, in

each paramere evenly narrow before ventral view ( fig. 7 );

the apex, in ventral view ( fig. 2 ); ventral plate trapezoidal, very wide basally ( fig. 7 )

ventral plate narrow and elongate

( fig. 2 )

Figures

Figs 11-22: Colour pattern of left elytron. – 11-16: Exomala campestris – 17-22: Exomala succincta – 11-13, 17-19: . – 14-16, 20-22: . – 11, 14, 17, 20: Specimens with reduced dark marks. – 12, 15, 18, 21: Specimens with moderately developed dark marks. – 13, 16, 19, 22: Specimens with well developed dark marks. – 11: Gallia mer. – 12: France. – 13: Gironde: La Teste. – 14: France. – 15: France. – 16:Wironde: Soulac-sur-Mer.– 17: Tirol. – 18:Tirol mer. – 19: Tirol. – 20: Emilia, Reno. – 21: Piemonte: Garearel. – 22: Bolzano.

Figs 6-10: Exomala succincta, France, Basses Alpes, St. Andire, . – 6: Aedeagus, dorsal. – 7: Aedeagus, ventral. – 8: Aedeagus, lateral. – 9: Last joint and inner claw (outer claw not shown) of right fore tarsus. – 10: Pronotum and scutellum.

Figs 1-5: Exomala campestris, France, Gironde, La Teste, . – 1: Aedeagus, dorsal. – 2: Aedeagus, ventral. – 3: Aedeagus, lateral. – 4: Last joint and inner claw (outer claw not shown) of right fore tarsus. – 5: Pronotum and scutellum.

Fig. 36: Boxplots of the body length of males and females of E. campestris and E. succincta.