Research Article ISSN 2336-9744 (online) | ISSN 2337-0173 (print) The journal is available on line at www.biotaxa.org/em

https://zoobank.org/urn:lsid:zoobank.org:pub:E8AC9FCD-2476-496F-99A6-B44A1727C127

This paper is dedicated to the memory of our colleague Academician Božidar Ćurčić, a great man and scientist

Duvalius bozidari, a new cave-dwelling species of trechine ground (Coleoptera: Carabidae: ) from western Serbia

SREĆKO ĆURĈIĆ1*, DRAGAN PAVIĆEVIĆ2, NIKOLA VESOVIĆ1 & MATIJA PETKOVIĆ1

1Institute of Zoology, University of Belgrade - Faculty of Biology, Studentski Trg 16, 11000 Belgrade, Serbia 2Institute for Nature Conservation of Serbia, Dr Ivana Ribara 91, 11070 Belgrade, Serbia, e-mail: [email protected] *Corresponding author: [email protected]

Received 15 November 2016 │ Accepted 16 December 2016 │ Published online 22 December 2016.

Abstract A new trechine ground species, Duvalius (Neoduvalius) bozidari sp. n. (from two underground objects in the surroundings of the city of Valjevo, western Serbia), is described and diagnosed in the current study. The male and female genitalia and other taxonomically important morphological structures are presented. The new species is clearly different from the closest relatives and is endemic to caves in a limited area in western Serbia.

Key words: carabids, Neoduvalius, new species, troglobitic fauna, Serbian Dinarides.

Introduction

At present, 15 species of the subgenus Neoduvalius Müller, 1913 (genus Duvalius Delarouzée, 1859) have been known. These inhabit southern and western Bosnia and Herzegovina, central and southern Croatia and western Serbia (Jeannel 1928; Moravec et al. 2003; Janák & Moravec 2008; Lohaj et al. 2013). Currently, the territory of Serbia is inhabited by a single endogean Neoduvalius species so far – Duvalius (Neoduvalius) guidononveilleri Janák & Moravec, 2008 (from Sedlo, Divĉibare, Mt. Maljen, 700–900 m a.s.l., western Serbia) (Janák & Moravec 2008; Lohaj et al. 2013). A few new genera of Trechinae have been recently described from Serbia: Serboduvalius Ćurĉić, Pavićević & Ćurĉić, 2001, Javorella Ćurĉić, Brajković & Ćurĉić, 2003, Rascioduvalius Ćurĉić, Brajković, Mitić & Ćurĉić, 2003, Curcicia Ćurĉić & Brajković, 2003 and Glabroduvalius Vrbica, Ćurĉić, Antić & Ćurĉić, 2013. Among them, three are recorded in western and southwestern Serbia (Serboduvalius, Javorella and Rascioduvalius) (Ćurĉić et al. 2001, 2003a, b; Ćurĉić & Brajković 2003; Vrbica et al. 2013). Several former Neoduvalius taxa from Serbia, described within Neoduvalius or later positioned within the taxon, were recently assigned to some of the newly described genera – Rascioduvalius cvijici (Jeannel, 1923), R. stopicensis (Jeannel, 1923), R. zlatiborensis Ćurĉić, Brajković & Ćurĉić, 2005, Serboduvalius starivlahi (Guéorguiev, Ćurĉić & Ćurĉić, 2000) and S. dragacevensis Ćurĉić, Pavićević & Ćurĉić, 2001 (Ćurĉić et al. 2013).

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The karstic mountainous regions in Serbia (Dinarides in the western part of the country, and Carpathian and Balkan mountains in the eastern and southeastern parts) are not sufficiently studied so far. There we may expect some new troglobitic and endogean trechine taxa to be found in the future. A few field trips performed by an author of the paper (M. P.) and Fabrizio Bosco (A. F. Linder Association for the Study of Karst, Ronchi dei Legionari, Italy) in two underground objects in western Serbia (the surroundings of the city of Valjevo) resulted in the discovery of a new Duvalius (Neoduvalius) species: D. (N.) bozidari sp. n. We present the description and the diagnosis in the current study.

Material and Methods

The diagnosis of D. (N.) bozidari sp. n. is based on the study of the type series of one male and two females collected during 2014 and 2015 in two underground objects (Jovanjska Pećina Cave and Filipov Ponor Pit) in the surroundings of the city of Valjevo (western Serbia). All specimens were collected by hand. The collected specimens were studied in the laboratory of the Institute of Zoology, University of Belgrade - Faculty of Biology, Belgrade, Serbia. The ground beetle specimens were dissected, analyzed and photographed. Dry beetles and the genitalia were glued onto separate rectangular paper labels situated on the same entomological pin. A Nikon SMZ 18 stereomicroscope with a Nikon DS-Fi1c digital camera attached, as well as a Leica DMLS light microscope with a Leica DC 300 camera attached were used for studying and photographing morphological features of the beetle habitus and internal structures (genitalia and male abdominal sternite IX).

Measurements

M mean value for measurements R range of performed measurements TL total body length (from the apices of mandibles to the apex of elytra) HW maximum width of head HL head length (from the anterior margin of clypeus to the posterior end of genae) ANL total antennal length including the scape PW maximum width of pronotum PL length of pronotum (along the median line) PB pronotal base length EW maximum width of elytra EL length of elytra (as linear distance along the suture from the elytral base to the apex) HTL hind tarsi length AEL aedeagus length

Collections

IZFB collection of the Institute of Zoology, Faculty of Biology - University of Belgrade, Belgrade, Serbia CDP private collection of Dragan Pavićević, Belgrade, Serbia

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Taxonomy

Family Carabidae

Subfamily Trechinae

Duvalius Delarouzée, 1859

Neoduvalius Müller, 1913

Duvalius (Neoduvalius) bozidari Ćurčić & Pavićević, sp. n. (Fig. 1)

Material examined. Holotype male labeled as follows: “western Serbia, village of Jovanje, Jovanjska Pećina Cave, near the city of Valjevo, 30.XI.2014, leg. M. Petković & F. Bosco” (white label, printed) / Holotypus Duvalius (Neoduvalius) bozidari sp. n. S. Ćurĉić & D. Pavićević det. 2016” (red label, printed) (IZFB). Paratypes: two females labeled as follows: “western Serbia, village of Lelić, Filipov Ponor Pit, near the city of Valjevo, 13.IX.2015, leg. M. Petković” (white label, printed) / Paratypus Duvalius (Neoduvalius) bozidari sp. n. S. Ćurĉić & D. Pavićević det. 2016” (red label, printed) (IZFB, CDP). Description. TL R 3.84–4.395 mm (M 4.17 mm), male: 4.395 mm, females: R 3.84–4.28 mm (M 4.06 mm). Body and appendages red-yellowish, mouthparts except mandibles yellowish, setae yellowish, labrum with a median basal black dot in holotype and a paratype, while in another paratype the dot is missing. Body smooth, except genae. Body in dorsal view brilliant. Vertex with a discernible isodiametric microscupture. The rest of head in dorsal view smooth and glossy. Pronotum basally with a minute transverse microscuplture, while the remaining part being glossy. Elytral disc with a minute transverse microsculpture. Head of medium size, HW/HL R 1.19–1.22, M 1.21, widest somewhat in front of the ¾ length level, narrower than pronotum (PW/HW R 1.16–1.18, M 1.17) (Fig. 1a). Eyes completely missing, each replaced by a darkened arcuate slit. Frontal furrows regularly arcuate or sub-arcuate, anteriorly deepened, ending at the level between 1st and 2nd supra-orbital setae. Cheeks rounded, with barely visible very short hairs. Labrum with a median short tooth-like projection. Median bulge of mentum long, bifid. Antennae slender, somewhat longer than elytra (male: AL/EL 1.01; females: R 1.02–1.10, M 1.06). Relative length ratios of antennomeres in holotype male = 1.08: 1.00: 1.24: 1.04: 1.04: 1.04: 1.00: 0.96: 1.00: 0.94: 1.20. Antennomeres 8–10 elongately oval, the length/width ratios R 1.96–2.19, M 2.10. Pronotum cordiform, rounded, transverse (PW/PL R 1.12–1.21, M 1.16), widest somewhat below the ¼ length level, somewhat constricted towards base (PW/PB R 1.53–1.625, M 1.57), lateral margins anteriorly rounded, posteriorly narrowing, sinuate (Fig. 1a). Hind angles sharp to almost rectangular, acute, laterally dragged, fore angles rounded, protruding forward. Base almost straight. Basal fossettes small and deep. Midline basally deepened and broadened, reaching pronotal base. Lateral furrows anteriorly wider, posteriorly narrow. Two pairs of marginal pronotal setae present. Elytra rounded, oval (EL/EW R 1.60–1.82, M 1.69), widest at the middle, in average less than three times as long as pronotum (male: EL/PL 3.085; females: R 2.80–2.915, M 2.86), considerably wider than pronotum (EW/PW R 1.45–1.60, M 1.55) (Fig. 1a). Shoulders protruding forward, obtuse-angled, rounded. Lateral furrows moderately wide anteriorly, gradually narrowing posteriorly. Striae poorly punctate, the three inner ones deepened, from the fourth being weakly noticeable. Striae 5–7 posteriorly not completely disappeared, barely visible. Fifth striae at the beginning conspicuously impressed. Eighth striae being the weakest. Inner interstriae convex, the remaining flattened. Elytral apex rounded. Elytral chaetotaxy: 1st discal setae on fourth interstriae, at the level between 3rd and 4th post-humeral setae (in holotype male and a paratype female) or somewhat below the level of 4th post-humeral setae (in another paratype female). Second discal setae on 3rd striae, below the mid-elytra level and slightly above the level of fore median setae of the umbilicate series. Distance 2nd discal seta-base of elytra/2nd discal seta-apex of elytra R 1.12–1.53, M 1.315. Pre-apical discal setae situated on the joining point of 2nd and 3rd striae, much closer to elytral suture than to elytral apex. Post-humeral setae 1 and 2 mutually somewhat more distanced than the distances 2–3 and 3–4 (the latter two distances being the same). Third and fourth post- humeral setae on eighth striae, out of elytral marginal furrow. The distance between fore and median groups of the umbilicate series around twice as long as the length of fore series.

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Figure 1. Duvalius (Neoduvalius) bozidari sp. n. from the Jovanjska Pećina Cave, village of Jovanje, near Valjevo, western Serbia: a - holotype male, habitus (dorsal view); b - holotype male, aedeagus (lateral view); c - holotype male, aedeagus (dorsal view); d - holotype male, abdominal sternite IX (urite); e - paratype female, genitalia. Scales = 2.00 mm (a) and 0.20 mm (b–e).

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Legs of medium length (Fig. 1a). Hind tarsi relatively long and narrow (male: EL/HTL 2.76; females: R 2.61, M 2.61). First metatarsomere much longer than 2–3 combined, slightly shorter than 2–4 combined. A weakly expressed fissure on each protibia at the outer side. First protasomere length/width in holotype male 1.33. Aedeagus (Figs. 1b and 1c) 1.13 mm long in holotype, elongate, relatively large (EL/AEL 2.40). Medial lobe in lateral view basally curved, anteriorly straight, medially convex, with a narrow apex moderately dragged upwards (Fig. 1b). Basal bulb in lateral view relatively small, elongately rounded (Fig. 1b). Medial lobe in dorsal view wide, sub-parallel, gradually narrowing towards a rounded top, while basal bulb rounded (Fig. 1c). Aedeagus dorsally weakly sclerotized (Fig. 1c), while ventrally well chitinized (Fig. 1b). Copulatory piece situated in an inner sac, gutter-formed, weakly chitinized, barely visible, thus the details could not be observed (Fig. 1c). Parameres slender, somewhat widened basally, each carrying four short and narrow setae (Figs. 1b and 1c). Male abdominal sternite IX (urite) large, sub-triangular (Fig. 1d). Both gonocoxites and gonosubcoxites IX as presented in Fig. 1e. Gonocoxites IX short and wide, curved, gradually narrowing distally, each with a pointed apex, basally joined with rounded gonosubcoxites IX of moderate length (Fig. 1e). Differential diagnosis. The new species is compared here with the morphologically closest species, Duvalius (Neoduvalius) guidononveilleri Janák & Moravec, 2008 (Janák & Moravec 2008). Duvalius (Neoduvalius) bozidari sp. n. differs from D. (N.) guidononveilleri in the TL (males: 4.395 mm vs. M 4.85 mm; females: M 4.06 mm vs. M 4.61 mm), the degree of hairiness on cheeks (with a few weakly discernible very short hairs vs. with more numerous longer hairs), the AL/EL (males: 1.01 vs. M 0.99; females: M 1.06 vs. M 1.01), the relative antennomere length ratios in holotype male (1.08: 1.00: 1.24: 1.04: 1.04: 1.04: 1.00: 0.96: 1.00: 0.94: 1.20 vs. 1.14: 1.00: 1.35: 1.01: 1.05: 1.05: 0.99: 0.92: 0.95: 0.90: 1.18), the length/width ratios of antennomeres 8–10 (M 2.10 vs. M 2.04), the PW/PL (M 1.16 vs. M 1.19), the PW/PB (M 1.57 vs. 1.54), the shape of fore (more rounded vs. more pointed) and hind pronotal angles (sharp, almost rectangular vs. sharp), the width of pronotal marginal furrows (anteriorly wider vs. narrow over the whole length), the EL/PL (M < 3 vs. M cca. > 3.1), the shape of shoulders (more rounded vs. more obtuse), the position of 2nd elytral discal setae (each on 3rd stria, slightly above the level of fore median seta of the umbilicate series vs. each mostly in 4th interstriae, at the level of fore median seta of the umbilicate series), the distance 2nd discal seta-base of elytra/2nd discal seta-apex of elytra (M 1.315 vs. M 1.41), the position of post-humeral setae (equidistant vs. distance 1–2 somewhat longer than 2–3 and 3–4, the latter distances being the same), the EL/HTL in females (M 2.61 vs. M 2.75), the presence of a fissure on fore tibias (present vs. absent), the protarsomere I length/width ratio in males (1.33 vs. M 1.25), the EL/AEL (2.40 vs. M 2.47), the shape of median lobe in lateral (medially straight, dorsally convex, with a moderately dragged apex upwards vs. medially slightly curved, dorsally more obtuse, with an apex dragged upwards to a lesser or greater degree) and dorsal views (less wide, sub-parallel, gradually narrowing apically, with a rounded apex vs. more wide, medially slightly thickened, abruptly narrowing sub-apically, with a pointed/obtuse apex), the shape of basal bulb in lateral view (rounded, less elongate vs. more angulose, more elongate) and the shape of copulatory piece (no processes noticed, less chitinized vs. with three apical processes, more chitinized) (Janák & Moravec 2008; this study). The new species is distributed in underground objects in the vicinity of the city of Valjevo, while D. (N.) guidononveilleri is endogean and inhabits Mt. Maljen (Sedlo, Divĉibare, 700–900 m a.s.l.) (Fig. 2) (Janák & Moravec 2008). Etymology. The new trechine species is named after the late Acad. Prof. Dr. Božidar Ćurĉić, father of the first author, a famous Balkan arachnologist, biospeleologist, developmental biologist and taxonomist. Distribution. So far, D. (N.) bozidari sp. n. is known only from the type localities (Jovanjska Pećina Cave and Filipov Ponor Pit) in the vicinity of the city of Valjevo, western Serbia. Habitat. The species inhabits cave habitats in the surroundings of Valjevo in western Serbia. Type series of the new species was collected by hand in posterior, totally dark parts of two investigated underground objects. The specimens have been found under stones and on floor in moist places of the caves.

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Figure 2. The distribution of Duvalius (Neoduvalius) bozidari sp. n. (black circles) and D. (N.) guidononveilleri Janák & Moravec, 2008 (black star) in Serbia.

Acknowledgements The study is financially supported by the Serbian Ministry of Education, Science, and Technological Development (Grant No. 173038). We are especially indebted to Mr. Fabrizio Bosco (A. F. Linder Association for the Study of Karst, Ronchi dei Legionari, Italy), who helped us to collect the beetles. We kindly appreciate the help of Assist. Prof. Dr. Snežana Pešić (Faculty of Science, University of Kragujevac, Serbia), who has reviewed the manuscript and gave a number of useful comments.

References

Ćurĉić, S. B. & Brajković, M. M. (2003) Curcicia, a new genus of endemic ground beetles (Trechini, Carabidae, Coleoptera) based on Duvalius bolei Pretner. Archives of Biological Sciences, Belgrade, 55 (3–4), 27P–28P. Ćurĉić, S. B., Brajković, M. M., Ćurĉić, B. P. M. & Mitić, B. M. (2003a) Javorella, a new genus of endemic ground beetles (Trechini, Carabidae, Coleoptera) from West and Southwest Serbia. Archives of Biological Sciences, Belgrade, 55 (1–2), 15–22. Ćurĉić, S. B., Brajković, M. M., Mitić, B. M. & Ćurĉić, B. P. M. (2003b) Rascioduvalius, a new genus of cave and endogean trechines (Trechini, Carabidae, Coleoptera) from the Balkan Peninsula. Periodicum biologorum, 105 (4), 483–486. Ćurĉić, S. B., Ćurĉić, B. P. M. & Vrbica, M. (2013) Remarks on some trechine ground beetle taxa from the Balkan Peninsula (Coleoptera: Carabidae: Trechini). Archives of Biological Sciences, Belgrade, 65 (4), 1675–1686. Ćurĉić, S. B., Pavićević, D. & Ćurĉić, B. P. M. (2001) Serboduvalius dragacevensis, a new genus and a new species of trechines from caves in Southwestern Serbia (Trechinae, Carabidae, Coleoptera). Archives of Biological Sciences, Belgrade, 53 (1–2), 51–56. Janák, J. & Moravec, P. (2008) Drei neue Duvalius-Arten aus Bulgarien und Serbien (Coleoptera: Carabidae: Trechinae). Klapalekiana, 44, 1–19.

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