Lomechusoides inflatus ( Zetterstedt, 1828 )

Jászay, Tomáš, Hlaváč, Peter & Baňař, Petr, 2023, A taxonomic revision of the myrmecophilous genus Lomechusoides Tottenham, 1939 (Coleoptera: Staphylinidae: Aleocharinae). Part II. The revision of the strumosus species group, Zootaxa 5343 (6), pp. 539-593 : 549-552

Lomechusoides inflatus ( Zetterstedt, 1828)

Figs 20–29

Lomechusa inflata Zetterstedt, 1828: 95 . Type data: northern Sweden: Wittangi Lapponiae Tornensis .

Lomechusa inflata Zetterstedt, 1828 : Erichson, 1840: 205; Thomson, 1860: 242; Palm, 1949: 101.

Lomechusa Mariae Palm, 1949: 101 . Type data: Norrbotten (northern Sweden): Kihlangi (ZNML, RM Stockholm). Synonymized by Schilow, 1981: 218.

Lomechusa teres Eppelsheim, 1884: 11 . Type data: Passĥhe des Kasbek.

Lomechusa teres Eppelsheim, 1884 : Jakobson, 1909: 555 (synonym of L. inflatus ); Roubal, 1916: 46 (synonym of L. inflatus ).

Material studied: Lomechusoides inflatus : HOLOTYPE, ♀: SWEDEN: (The following parts of the body are missing: right antenna and left mesotarsomeres II–V; tergites and sternites VII–XI and spermatheca are embedded in euparal on two separed labels which are pinned with the holotype): (h) L. inflata / (h) L. inflata Zett. (p): W. Schilov det. 19 / (p) Type No., Zool. Mus. Lund, Sweden (h) 1: 1141 Staphylinidae / (p) 1970, 67 / red label (p) HOLOTYPE ♀ Lomechusoides inflatus ( Zetterstedt, 1828) , des. Jászay & Hlaváč, 2020 ( MBLU).

Lomechusa mariae : LECTOTYPE, ♁, here designated: SWEDEN: paper label with host ant (tergites and sternites VIII–X, aedeagus and parameres in euparal) / 2 x (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg. / (h) Formica lugubris pseudogyn. Zett (p) det. K. H. Forsslund / red label (p) HOLOTYPUS Lomechusa mariae Palm / (p) TYPE NO. (h) 1210:1–6 (p) Zool. Mus. Lund Sweden (h) Staphylinidae /(p) host ant (h) Formica rufa L. (p) P. Hlaváč det. 200 (h) 5 / red label (p) LECTOTYPE ♁ Lomechusoides mariae ( Palm, 1949) , des. Jászay & Hlaváč, 2020 ( ZMLU). PARALECTOTYPES, 1♀: SWEDEN: (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg. /red label (p) Allotypus (h) Lomechusa mariae Palm / (p) Type No. (h) 1210: 2 / red label (p) PARALECTOTYPE ♀ Lomechusoides mariae ( Palm, 1949) , des. Jászay & Hlaváč, 2020 ( MBLU). 1♁: (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg. / (h) blue ink Lomechusa mariae Palm (p) Det. Th. Palm. / (p) TYPE No. (h) 1210:3 / red label (p) PARALECTOTYPE ♁ Lomechusoides mariae ( Palm, 1949) , des. Jászay & Hlaváč, 2020 ( MBLU). 1♁: (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg. / (p) Mariae n. sp. / (h) typ-ex / red label (p) Holotypus / (p)19(h)80 (p)68 / (p) Type No. 1210: 5 / (h) L. inflata Zett. (p) W. Schilov det 19 / red label (p) PARALECTOTYPE ♁ Lomechusoides mariae ( Palm, 1949) , des. Jászay & Hlaváč, 2020 ( MBLU). 1♀: (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg. / (p) TYPE No. 1210: 4 / red label (p) PARALECTOTYPE ♀ Lomechusoides mariae ( Palm, 1949) , des. Jászay & Hlaváč, 2020 ( MBLU). 1♀ [spermatheca lost]: (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg. / (p) TYPE No. 1210: 6 / red label (p) PARALECTOTYPE ♀ Lomechusoides mariae ( Palm, 1949) , des. Jászay & Hlaváč, 2020 ( MBLU). Other material studied. Finland: 1♀: (p) Fennia Nyl. Helsinge, 30.VI.1940, O. Wellenius / (p) in nido Formicae uralensis / (p) Lomechusa inflata Zett. H. Lindderg det. ( MBLU); 1♀ +ant host: (p) Suomi InL [=Inarin Lappi]: Inari, (h) 3/7. (p) 6.1981, E. Kangas leg. / (p) http://id.luomus.fi/GAC.26876, (ant host: Formica gagatoides : http://id.luomus. fi/GAC.26878), Lomechusoides inflatus ( Zetterstedt, 1828) , E. Kangas det. ( MZHF). 2♀♀: (p) Suomi InL: Inari, (h) 8. (p) 6.1981, E. Kangas leg. / (p) http://id.luomus.fi/GAC.26873, http://id.luomus.fi/GAC.26874, Lomechusoides inflatus ( Zetterstedt, 1828) , E. Kangas det. ( MZHF). 1♁: (p) Fennia Kn: Kuhmo, 711:62, (h) 2.5. (p)19 (h)77, (p) Jyri Ilén leg. / (h) kiven alla mustien muurahaisten pesä [=from a colony of black ants under a stone] / (h) Lomechusa mariae Palm, O. Biström det. ( EHC). 1♀: (p) Finland 7503:558 Lke: Savukoski, 28.6.– 1.7.2003, leg. E. Helve / (p) http://id.luomus.fi/GAD.947 ( EHC). 1♁: (p) Finland 7503:558 Lke: Savukoski, 26.6.– 17.7.2004, M. Luiro / E. Helve / (p) http://id.luomus.fi/GAD.949, ( EHC). 2♀♀: (p) Finland 7503:558 Lke: Savukoski, 3.6.– 6.7.2005, M. Luiro / E. Helve / (p) http://id.luomus.fi/GAD.951, http://id.luomus.fi/GAD.952, ( EHC). 1♀ (anomalous ex. with 9 antennal segments, V–VI and probably IX–X segment are adherent): (p) Finland 7503:558 Lke: Savukoski, 20.8.– 19.10.2005, M. Luiro / E. Helve / (p) http://id.luomus.fi/GAD.950, ( EHC). 1♀: (p) Fennia (h) L, Enare, O. Biström / (p) 818 / (h) mariae Palm , (p) Stockman det. / (p) http://id.luomus.fi/GAC.26880, Lomechusoides mariae Palm, Stockman det. ( MZHF). 1♀: (p) Fennia Lkem, Pelkosenniemi, Pyhäjärvi (h) 22 (p).6.51, Håkan Lindberg / (p) Coll. Lindberg / (p) http://id.luomus.fi/GAC.26879, Lomechusoides mariae Palm, H. Lindberg det. ( MZHF). Russia: 1♁ 3♀♀: (h) Плато Махбарвум чорра, Хибинск. горы (Plato Machbarvum chorra, Khibinsk. gory [Khibiny Mts., Kola peninsula, Russia) 10.6.1936 на снегу Фриголин [=na snegu, Frigolin] / (h) Lomechusa teres Epp. (p) W. Schilov det. 19 ( ZIN). 1♀: (p) бас. р. Маньи, Лесной Урал, ЛЯпин Флеров (h) 16–19.VI. (p) 927[=bas. r. Man´i, Lesnoy Ural, Lyapin Flerov] / (p) Lomechusa (h) inflata Zet. (p) Shavrin det. (h) 97 ( ASC). Sweden: 1♁ 2♀♀: (p) Tol. Sappisadsi (h) 2.6.1950 (p) N. Höglund ( NMPC, MBLU). 1♀: (p) LuLpm (h) 9.5.75, Kuoka (p) S. Lundberg / (h) L. inflata (p) det. Stig Lundberg / (p) Lomechusoides inflatus Zett. Det. M. Dvořák / (p) Lomechusoides inflatus Zetterstedt P. Hlaváč det., 2000 ( NMPC). 1♁ 2♀♀: (p) LuLpm (h) 9.5.75, Kuokka (p) S. Lundberg ( MBLU). 2♁♁ 2♀♀: (p) S: Lu Kuotka, 9.5.1975, leg. Kurt Persson / (h) Lomechusa mariae (p) det. Ambĵrn Carlsson, Data Zoo-tax ( MBLU). 1♀: (h) Suecia: P. Lpm. Reivo 29.8.1960 Lundberg lgt. / (p) Lomechusoides inflatus Zetterstedt, P. Hlaváč det., 2000 ( NMPC). 2♀♀: (p) Tol. Soppero (h) 5 (p)/6 (h) 50 (p) N. Höglund; 1♀: (p) Pinus / (h) Formica (two illegible words) / (h) T Lpm. Soppero 12.6. 58 N. Hgl. ( MBLU). 1♀: Lu Lpm. Jokkmokk, Vaikijaur 27.5.1965, T. B. Engelmark ( MZLU). 1♀: Reivo [=naturreservat], Arvidsjaur, 29.8.1960, Stig Lundberg ( MBLU). 1♀: (h) Lpl. Soppero, 7.6. 50 N. Hd. / (p) http://id.luomus.fi/GAC.26897, Lomechusoides mariae Palm, T. Palm det. ( MZHF). 1♁: (p) Nb. Kihlangi, 10–17.6.47, T. Palm leg./ (p) http://id.luomus.fi/GAC.26896, Lomechusoides mariae Palm, T. Palm det. ( MZHF). 1♀: Nb. Kihlangi, 10–17.6.47, T. Palm leg./ (h) Lomechusoides mariae Palm , (p) det. Thure Palm/(p) http://id.luomus.fi/GAC.26895, Lomechusoides mariae Palm, T. Palm det. ( MZHF).

Description. Body light reddish-brown ( Fig. 20 ) except antennae, boundless longitudinal patch on frontoclypeal region, labrum, disc of pronotum, anterior margin of visible tergites II–IV, larger part of anterior margin of visible tergites V–VII, narrow part of lateral side of visible sternites III–IV and larger part of anterior margin of visible sternites V–VII brown.

Head rectangular, dull, slightly longer than wide, ratio HW/HL: ♀ 0.88, ♁ 0.88, with deep, wide, round frontal median impression which is microsculptured and with large shallow punctures; disc of head microsculptured with fine punctures; length of eyes ♀: 0.23x, ♁: 0.24x of length of head; eyes very slightly protuberant, temples slightly convergent posteriad.

Antennae long, scape ♀ 1.46x, ♁ 1.61x as long as wide and ♀ 2.11x, ♁ 2.65x as long as pedicel, pedicel ♀ 1.12x ♁ 0.88x as long as wide, antennomere III: ♀ 1.22x, ♁ 1.66x, IV: ♀ 1.10x, ♁ 1.10x as long as wide, antennomeres V–VIII elongate oval, terminal antennomere slender and acute, ♀ 1.47x, ♁ 1.38x as long as scape, relative length of antennomeres from base to apex: ♀: 19: 8: 11: 10: 12: 12: 13: 13: 13: 12: 28; ♁: 21: 8: 15: 11: 12: 12: 14: 14: 14: 14: 29.

Pronotum ( Fig. 21 ) trapezoidal, ratio PW/PL: ♀ 1.50, ♁ 1.61, with clearly concave anterior margin, well-marked obtuse anterior corners, lateral sides in anterior third broadly rounded, in second third subparallel, in posterior third slightly convergent posteriad, posterior corners acute, bearing deep lateral microsculptured, sparcely punctate impressions, impressions in posterior margin with uneven cluster of few deep punctures, pronotal disc markedly microsculptured, with sparse, uneven puncturation, tubercles well-defined; median line well-defined, narrow; in lateral view lateral margins in anterior half thick, narrowed anteriad, in posterior half narrow, lacking visible sharp edge; maximal width of pronotum at posterior corners, here slightly narrower than elytra at humeri; pronotum with reduced number of macrosetae, anterior margin with two–four macrosetae, lateral margins in posterior corners with one macroseta.

Anterior and lateral margins of metaventral process ( Fig. 24 ) concave, anterior part with lateral lines, convergent anteriad, in anterior part lateral lines connected with transverse carinate elevation; posterior part in median line with small, oval, deep lentil-like impression, metaventral process microsculptured and punctate; disc of metaventrite with longitudinal narrow and shalow impressions on sides of median line, impressions divergent posteriad, metaventrite microsculptured and unevenly sparcely punctate, discal setae short, not reaching margin of adjacent puncture.

Elytra finely punctate, ♀ 0.89x, ♁ 0.85x as long as pronotum, ratio EW/EL: ♀ 2.06, ♁ 2.20; with three macrosetae in anterior part, humeral part lacking macrosetae, distance between punctures on disc about 1–2x diameter of puncture.

Abdomen with visible tergite II densely punctate and setaceous, visible tergites III–IV with dense and V with sparse puncturation on posterior margin, visible tergites VI–VII very sparsely and finely punctate at posterior and lateral margins, visible tergites II–VIII unevenly but distinctly microsculptured.

Aedeagus ( Figs 22–23 ) with slender median lobe, apical lobe tube-like, distinctly shorter than basal bulb, apical part short and plump, with dense pseudopores, in lateral view ventral side slightly convex, apex slightly sharp, lateral sides of apical lobe in ventral view slightly convergent apically. Apical lobe of parameres subparallel ( Fig. 25 ), hook-shaped and bent backwards, apex with about 6 setae, lacking minute microsetae.

Spermatheca ( Figs 26–28 ) with apical part 1.26x as long as basal part and 1.26x wider than basal extended part and 2.41x as long as wide, apical part subparallel apically and apex rounded.

Measurements. (♀, Holotype): TL 5.00 mm; FB 2.45 mm; HL 0.85 mm; HW 0.75 mm; antennal length 2.42 mm; PL 0.90 mm; PW 1.35 mm; EL 0.80 mm; EW 1.65 mm; FTL 0.92 mm; MTL 1.10 mm; HTL 1.35 mm. (♁, Lectotype of L. mariae ): TL 5.50 mm; FB 2.85 mm; HL 0.90 mm; HW 0.80 mm; antennal length 2.65 mm; PL 0.97 mm; PW 1.56 mm; EL 0.82 mm; EW 1.80 mm; FTL 0.95 mm; MTL 1.25 mm; HTL 1.47 mm.

Differential diagnosis. L. inflatus is very similar to L. drobovi , L. chekanovskiyi , L. inflatiformis and L. poppiusi . From L. drobovi , L. chekanovskiyi and L. poppiusi it differs by the bicoloured pronotum. From L. inflatiformis it differs by the narrower, light reddish lateral margins of pronotum with visible discal tubercles, by antennomeres III–IV in males with longer setae ( Fig. 29 ) and by the darker head.

Host ant. Formica gagatoides Ruzsky, 1904 (det. Juho Paukkunen), Formica rufa Linnaeus, 1761 , Formica pratensis Retrius, 1783 and probably also Formica sanguinea Latreille, 1798 .

Distribution. Finland, Russia (peninsula Kola), Sweden.

Figures

FIGURES 20–29. Lomechusoides inflatus Zetterstedt, 1828. 20, Lomechusoides mariae Palm, 1949, male lectotype, dorsal habitus; 21, L. mariae, male lectotype, pronotum in dorsal view (L: 0.90 mm, W: 1.35 mm); 22, L. mariae, male paralectotype, aedeagus, lateral view; 23, L. mariae, male paralectotype, aedeagus, ventral view; 24, L. mariae, male lectotype, metaventral process; 25, L. mariae, male paralectotype, apex of paramere; 26, L. inflatus, female holotype, spermatheca; 27, L. mariae, female paralectotype, spermatheca, (locality: Kihlangi); 28, L. mariae, female, spermatheca (locality: Soppero); 29, L. inflatus, male, antennomeres III–IV, (locality: Kihlangi). Scale bars in mm.