A REVISION OF MAGDELAINELLA JEANNEL, WITH A DESCRIPTION OF M. STUDENICAE SP. N. (COLEOPTERA, LEIODIDAE, LEPTODIRINI), A NEW ENDOGEAN BEETLE FROM SERBIA

A new species of endogean leptodirine leiodids (Magdelainella studenicae sp. n.) from the valley of the Studenica River, village of Miliće, near Ušće in Southwest Serbia, is diagnosed and described. This new species differs clearly from all other closely related taxa. Magdelainella Jeannel belongs to a phyletic lineage which includes three more genera: Knirschiella �u�orguiev, Kosaniniella S. Ćurčić, Brajković & B. Ćurčić, and Derveniella �avićević & �erreau. Derveniella is given full generic status in the present paper; its members are known from Southeast Serbia only. Magdelainella noesskei (Apfelbeck), M. winkleri Jeannel, M. bozidarcurcici S. Ćurčić & Brajković, M. mucanjensis S. Ćurčić, Brajković, B. Ćurčić & Schönmann, M. milojebrajkovici S. Ćurčić & B. Ćurčić, M. zivojindjordjevici S. Ćurčić, Brajković, B. Ćurčić & Schönmann, and M. nikolateslai S. Ćurčić, Brajković, B. Ćurčić & Schönmann are sharply delimited and represent valid species. The following new combinations are proposed for three species of Magdelainella: Kosaniniella hussoni (Jeannel), comb n., K. nonveilleri (�avićević & �erreau), comb. n., and K. orientalis (�avićević & �erreau), comb. n. The Magdelainella-Knirschiella-Kosaniniella-Derveniella complex is probably of Mesogeid age and origin; its species originated during the Alpine Orogeny, which affected vast areas of the Balkan �eninsula, their terra typica.


INTRODUCTION
The subterranean and endogean invertebrates of Serbia have been the object of extensive and intensive investigations in the recent past and are well-known for their high specific diversity and exceptional specialization of many taxa (Ćurčić, 2002).However, the leiodid fauna in Serbia is insufficiently known.A great number of endogean and cave taxa from the subfamily Cholevinae were described in the first half of the 20 th century, among which the three species of the genus Magdelainella Jeannel from Serbia -M.serbica (Müller), M. winkleri Jeannel, and M. hussoni Jeannel (Müller, 1904;Jeannel, 1924Jeannel, , 1934)).M. serbica and M. hussoni were subsequently found in Montenegro (�avićević and �erreau,200�).
A thorough study of a sample of leptodirine beetles from Southwest Serbia has enabled us to establish a new species, Magdelainella studenicae sp.n.The description of this new species is based on the study of the holotype male, paratype male, and paratype female.The type specimens are deposited in the collection of the Centre for Biospeleology, S. ĆURČIĆ ET AL.

75�
Institute of Zoology, Faculty of Biology, University of Belgrade, Serbia .
Since the present knowledge imposes the necessity of a critical revision of some Magdelainella, we propose new status and new combination for some taxa considered herein in this paper.

MATERIALS AND METHODS
The leiodid beetles were fixed on paper lebels and then analyzed as dry specimens.�enital structures were removed from insect bodies and fixed on microscope slides in a medium composed of Canada balsam and xylol.
The specimens obtained were analyzed in detail in laboratories of the Institute of Zoology, Faculty of Biology, University of Belgrade.Carl Zeiss-Stemi 2000 and Carl Zeiss-Ergaval binocular stereomicroscopes were used in this study, together with a special monitor and accessories for drawing.(Müller), and two last mentioned as synonyms of M. hussoni Jeannel.We deny such superficial opinion of these two authors; actually, this paper lacks a serious scientific analysis and the authors did not analyze any of the type specimens of each of the mentioned species.All "descriptions" and "diagnoses" by �avićević and �erreau (200�) are redundant and insufficient and many valid comparative data are completely missing.From M. serbica, the new species clearly differs by the presence/absence of eyes (absent vs. present), length of last antennomere (shorter than the two precedent antennomeres taken together vs. as long as the two precedent antennomeres taken together), form of elytra (not narrowed backwards vs. somewhat narrowed backwards), form of mesosternal carina (almost right-angled vs. obtuseangled), form of median lobe (dragged apically vs. obtuse apically), features of inner sac (without any gutter-like structures vs. with an inverse Y-formed gutter-like structure), form of aedeagus in lateral view (median lobe more curved apically and more convex dorsally, parameres narrower vs. median lobe less curved apically and less convex dorsally, parameres wider), form of gonostylus (somewhat rounded proximally vs. not rounded proximally), and form of spermatheca (angulosely curved, with a large apical lobe vs. roundly curved, with a small apical lobe).
From M. bozidarcurcici, M. studenicae sp.n. differs in body size (2.19 mm vs. 2.03 mm), presence/absence of eyes (absent vs. present), length of antennomere III (slightly shorter than the demiantennomere II vs. as long as demi-antennomere II), length/width ratio of antennomeres VII and XI (1.33 and 2.00 vs. 1.20 and 1.50), form of mesosternal carina (with a less prominent tooth and straight margins vs. with a large, prominent tooth and convex margins), width/length ratio of elytra (0.�9-0.97 vs. 0.�6), maximum width of elytra (just below elytral base vs. at the level of elytral anterior quarter), form of apex of median lobe (pointed vs. blunt), form of tegmen (rounded vs. more elongated), features of inner sac (without any U-formed and gutter-like structures vs. both with U-formed and an inverse Y-formed gutterlike structure), form of male abdominal sternite IX (urite) (subovate, with two pointed processes vs. oval, ring-like), position of some female gonostyl setae (all inner setae equidistant vs. distalmost inner seta more distant from other two setae), and form of spermatheca (roundly curved, with a smaller proximal lobe vs. right-angulosely curved, with a larger proximal lobe).
From its phenetically close congener, M. zivojindjordjevici, the new species is clearly distinct by the body size (2.36 mm vs. 2.03 mm), presence/ absence of eyes (absent vs. present), antennal length (not reaching the level of the pronotum base vs. reaching the level of the pronotum base), length of antennomere III (slightly shorter than the demiantennomere II vs. as long as demi-antennomere II), length/width ratio of antennomere VII (1.14 vs. 1.20), form of pronotal base medially (protruding backwards vs. straight), length/width ratio of elytra (1.25 vs. 1.16), maximum width of elytra (after their fore third vs. at the level of their anterior quarter), form of gonostylus (gradually narrowing apically, somewhat rounded proximally vs. sharply narrowing apically, not rounded proximally), and form of spermatheca (straight, with the lobes of almost same vs.roundly curved, with the apical lobe better developed than the basal one).
From M. mucanjensis, the new species is clearly distinct by the body size (2.27 mm vs. 2.03 mm), body color (brownish vs. yellow-brownish), presence/ absence of eyes (absent vs. present), antennal length (almost reaching the level of the pronotum base vs. reaching the level of the pronotum base), length/ width ratios of some antennomeres (III: 1.50 vs. 2.00; VII: 1.14 vs. 1.20;XI: 1.60 vs. 1.50), length of antennomere XI (slightly longer than antennomeres IX + X together vs. as long as antennomeres IX + X together), width/length ratio of pronotum (1.�4 vs. 1.75), form of pronotal base medially (protruding backwards vs. straight), form of tooth of mesosternal carina (less pronounced vs. prominent), length/ width ratio of elytra (1.24 vs. 1.16), maximum width of elytra (just after their fore fifth vs. at the level of their anterior quarter), and form of spermatheca (moderately curved, with narrow proximal lobe vs. roundly curved, with wide proximal lobe).
From its close congener, M. milojebrajkovici, M. studenicae sp.n. is easily distinguished by the different body size (2.46 mm vs. 2.03 mm), body color (brownish vs. yellow-brownish), presence/ absence of eyes (absent vs. present), antennal length (not reaching the level of the pronotum base vs. reaching the level of the pronotum base), length of antennomere III (almost twice as long as wide, shorter than demi-antennomere II vs. twice as long as wide, as long as demi-antennomere II), shape of anterior pronotal angles (obtuse vs. prominent), maximum width of pronotum (at the level of its third fourth vs. at the level of its fourth fifth), form of pronotal base medially (protruding backwards vs. straight), apex of median lobe (roundly pointed vs. blunt), form of tegmen (rounded vs. more elongated), length of parameres (not reaching the level of the median lobe apex vs. reaching the level of the median lobe apex), form of parameral apex (convex exteriorly vs. flattened exteriorly), and features of inner sac (without a gutter-like structure, with two simple teeth vs. with an inverse Y-formed gutter-like structure, with two bifid teeth).
Antennae short, reaching the level of the pronotum base.Antennomeres I and II long; antennomere III small, twice as long as wide, as long as demi-antennomere II; IV-VI similar to III, gradually thickening from IV to VI; antennomere VII thickened, its length/width ratio 1.20; antennomere VIII small, almost twice as short as the preceding article; IX and X larger than VIII; antennomere XI 1.5 times as long as wide and as long as antennomeres IX + X together (Fig. 1).Maxillary palps each with a small conical distalmost article.�ronotum convex, its maximum width/length ratio 1.75, with short laid discal pubescence.Anterior pronotal angles prominent, almost sharp.Anterior pronotal margin convex medially.Lateral pronotal margins arcuate; pronotal base length greater than maximum elytral width.�ronotum widest at the level of its fourth fifth.�ronotal base straight in its median part.�ronotal disk with microsculpture and some tiny punctures.
Mesosternal carina high (Fig. 2), almost rectangular, with a large prominent apical tooth.Margins of mesosternal carina slightly convex.Seven setae are carried both on the tooth, as well as on the posterior margin of mesosternal carina.Intercoxal apophysis narrow.
Aedeagus moderately long (Figs.3-5), slightly arcuated, narrowing and pointing apically (Figs. 3  and 4).Tegmen rounded, elongated.Median lobe constricted in its posterior part and with a rounded apex.�aramerae long, slender, reaching the level of the median lobe apex.�arameral apex broad, with an outer process and three curved setae: one lateroexterior seta, one latero-dorsal internal seta, and one dorsal sub-apical seta (Fig. 5).Dorsal sub-apical seta somewhat more distant from latero-dorsal internal seta than the latter seta is distant from lateroexterior seta.
Internal sac with a sclerified complex armature (Fig. 3).Two bifid teeth situated above the medium part of the inner sac.Two lamellar parts exist just below the teeth.A chitinized basal U-formed structure situated at the base of the inner sac.An inverse Yformed gutter-like structure present above the teeth.
Distribution.-The genus Derveniella is presently known only from endogean localities on Mts.Svrljiške �lanine and Mt.Suva �lanina, as well as from the vicinity of Dimitrovgrad in the southeastern part of Serbia.
Remarks.-The genus Derveniella probably belongs to a separate phyletic lineage which originated during the �aleogene.The endemic differentiation of Derveniella and its related genera (Magdelainella, Knirschiella, and Kosaniniella) in the central part in the central part of the Balkan �eninsula was facilitated by the great Alpine Orogeny, paleoclimatic events, and subsequent evolution of the underground karstic relief which yielded many new epigean hypogean niches suitable for preserving this old and autochthonous fauna.Thus, the genus Derveniella represents an endemic and relict taxon inhabiting Serbia and the Balkan �eninsula.Jeannel (1934).

KOSANINIELLA
Distribution.-This species is presently known both from caves and endogean localities on �ešter plateau (Southwestern Serbia), as well as from a single cave in Northeastern Montenegro. Remarks.
-After analyzing some new, previously not used morphological features of "M." hussoni (shape of parameral apex, form of parameres laterally, position of parameral setae, structure of teeth from the inner sac, shape of spermatheca), we concluded that this species actually belongs in the genus Kosaniniella S.  (Ćurčić et al., 2004, 2004a)