Two New Species of the Genus Aristolebia Bates from the Island of Flores, Lesser Sunda Islands (Coleoptera, Carabidae, Lebiinae)

Two new species of the genus Aristolebia Bates from the island of Flores, Lesser Sunda Islands (Coleoptera, Carabidae, Lebiinae)

Martin Baehr

Two new species of the lebiine genus Aristolebia Bates, 1892 are described from the island of Flores, Lesser Sunda Islands, Indonesia: A. paracrucigera sp. n., related to A. crucigera Baehr, 2004 from Thailand, and A. floreana sp. n., related to A. oculata Baehr, 2010 and A. triramosa Baehr, 2010 from Sulawesi. A revised key to the genus Aristolebia is provided. Martin Baehr, Zoologische Staatssammlung München, Münchhausenstr. 21, D-81247 München. [email protected]

Introduction all species of Aristolebia I believe that this is a practi- Through the courtesy of Rob de Vos and Ben Brugge cable way to cope with these species. (NCB Naturalis, formerly Zoological Museum of The few records and the apparent difficulties in sam- the University of Amsterdam) I received a sample of pling of specimens suggest that the present distribu- south Asian and New Guinean carabid beetles for tion of the species, as well as the species diversity, is identification which, inter alia, included two speci- rather inadequately known, and that additional species mens of the lebiine genus Aristolebia Bates, 1892 may be detected in future within, but probably also from the island of Flores that represent two new spe- outside of, the hitherto recorded range of the genus. cies and are described in the present paper. The ten presently recorded species of the genus Aris- tolebia are distributed from southern India to China, Methods the Philippines, Sumatra, Sulawesi, New Guinea, In the taxonomic survey standard methods are used. and northern Australia (Csiki 1932, Jedlicka 1963, For dissecting the genitalia, the specimens were Darlington 1968, Moore et al. 1987, Lorenz 1998, relaxed overnight in a jar under moist atmosphere, Baehr 2010). Most species of this genus presently then cleaned for a short while in 10% KOH. The are available in small numbers and some are even habitus photographs were obtained by a digital cam- known only from the holotype which most prob- era using ProgRes CapturePro 2.6 and AutoMontage ably is caused by the almost unrecorded habits of and subsequently were worked with Corel Photo the species and, as a consequence, by the apparently Paint 11. inadequate sampling methods employed. Both new Measurements were taken using a stereo microscope species being described herein likewise are available with an ocular micrometer. Body length was meas- only in the holotype. However, as both are males ured from apex of labrum to apex of elytra, length of and because male genitalia are highly characteristic pronotum along midline, length of elytra from the in almost all examined Australian-Papuan species most produced part of the humerus to the most pro- of the genus, they are described yet on the basis of duced part of the apex. this small amount of material. In view of the very The types of the new species are stored in the col- characteristic colour patterns of the elytra in almost lection of the Netherlands Centre for Biodiversity

Downloaded from Brill.com09/26/2021 06:33:32PM via free access 216 Tijdschrift voor Entomologie, volume 154, 2011

Fig. 1. Male genitalia: aedeagus, parameres, and genital ring. Aristolebia paracrucigera. Scale bars: 0.5 mm.

Naturalis, Leiden, former collection of the Zoologi- semicircular pronotum without definite apical cal Museum of Amsterdam (ZMAN). angles, presence of two preapical excisions at the inner surface of the mesotibia in males, apparently Genus Aristolebia Bates also the odd-shaped, very strongly sclerotized aedeagus and the likewise odd-shaped and comparatively Aristolebia Bates, 1892: 428. – Csiki 1932: 1308; Jedlicka very large genital ring, and wide, more or less trian- 1963: 311; Darlington 1968: 83; Moore et al. 1987: gular, asetose gonocoxite 2 of the female. 309; Lorenz: 1998: 455; Kabak 2003: 427; Baehr In many other characters, Aristolebia is rather similar 2004: 247; 2010: 112. Type species: Aristolebia quadridentata Bates, 1892, by to the large genus Lebia sensu lato with which Aristo- monotypy. lebia certainly is closely related.

Revised key to the species of the genus Diagnosis Aristolebia The main diagnostic characters of the genus Aris- tolebia are: wide, depressed body, large, laterally For making comparison easier, figures in Baehr much protruded eye, angulate external angle of the (2004, 2010) are coded respectively as Ba04 and elytra, concave excision of the apex of the elytra, Ba10:fig.

Downloaded from Brill.com09/26/2021 06:33:32PM via free access Baehr: Two new species of Aristolebia 217

Fig. 2. Male genitalia: aedeagus, parameres, and genital ring. Aristolebia floreana. Scale bars: 0.5 mm.

1. Colouration almost uniformly light brown size larger, length >8 mm, usually consider- or piceous ...... 2 ably larger (if about 8 mm long, then elytra – Vivid colour pattern present on elytra . . . . . 3 with anchor-shaped dark spot in posterior 2. Body size smaller, length <8 mm. New half (see fig. 45 in Jedlicka 1963) and range Guinea, Australia: eastern Queensland . . . Philippine Is...... 6 ...... wau Darlington, 1968 5. Elytra longer and laterally less convex, ratio – Body size larger, length c. 12 mm. China . . length/width 1.52 (Ba04: fig. 1); punctures ...... prattiana (Bates, 1889) of the elytral intervals finer and less conspic- 3. Sutural angle of elytra angulate; tarsal claws uous; lower surface of the aedeagus slightly with 7–9 small teeth ...... 4 bisinuate, apex slightly curved down (Ba04: – Sutural angle of elytra rounded; tarsal claws Fig. 2). Thailand . . . . . crucigera Baehr, 2004 with 5 small teeth. Western Papua Indonesia: – Elytra shorter and laterally more convex, Vogelkop Peninsula . . capitis Darlington, 1968 ratio length/width 1.44 (Fig. 3); punctures 4. Elytra with cruciate colour pattern (Fig. 3, of the elytral intervals coarser and more Ba04: fig. 1); body size smaller, length <7.5 conspicuous; lower surface of the aedea- mm. Thailand, Flores ...... 5 gus slightly convex, apex not curved down – Colour pattern of elytra different and body (Fig. 1). Flores ...... paracrucigera sp. n.

Downloaded from Brill.com09/26/2021 06:33:32PM via free access 218 Tijdschrift voor Entomologie, volume 154, 2011

Figs 3–4. Habitus, body lengths in brackets. – 3, Aristolebia paracrucigera (6.5 mm); 4, A. floreana (8.9 mm).

6. Elytra with anchor-shaped dark spot in pos- – Disk of pronotum black; elytra either black terior half (see fig. 45 in Jedlicka 1963). Phil- with a large red spot in basal half on either ippine Is ...... davaonis (Heller, 1922) elytron, or with a black spot along suture – Colour pattern of elytra different; distri- which is widened behind scutellum and in bution different (Burma, Sumatra, Flores, apical half ...... 11 Sulawesi, New Guinea, Australia) ...... 7 9. Elytra with a contiguous dark sublateral 7. Elytra light red, only the latero-apical margin stripe (Fig. 4; Ba10: fig. 4); aedeagus as in narrowly black (see Ba10: fig. 2). Sumatra . . fig. 2 and Ba10: fig. 8 ...... 10 ...... apicalis Baehr, 2010 – Elytra without contiguous dark sublateral – Colour pattern of elytra different; distribu- stripe (Ba10: fig. 3); aedeagus unknown. tion different ...... 8 West Sulawesi ...... oculata Baehr, 2010 8. Pronotum uniformly red or reddish-brown; 10. Light apical spot of the elytra wide, oblique, apical half of elytra black with a large red and broadly attaining the apex, humerus spot on either elytron (Fig. 4; Ba10: figs 3, red (Ba10: fig. 4); tarsal claws with 7 small 4). Sulawesi, Flores ...... 9 teeth; aedeagus wider, markedly sinuate, and

Downloaded from Brill.com09/26/2021 06:33:32PM via free access Baehr: Two new species of Aristolebia 219

5 6 Figs 5–6. Head and prothorax. – 5, Aristolebia paracrucigera; 6, A. floreana.

with acute. spine-shaped apex (Ba10: fig. 8). the most similar species A. crucigera from Thailand North Sulawesi . . . . . triramosa Baehr, 2010 by the shorter and laterally more convex elytra, – Light apical spot smaller, circular and com- coarser punctures on the elytral intervals, far less dis- pletely encircled by dark colour, humerus tinct sublateral dark stripe in basal half of the elytra, black (Fig. 4); tarsal claws with 9 small teeth; and slightly convex lower surface and not down aedeagus narrower, less sinuate, and with curved apex of the aedeagus. regularly triangular apex (Fig. 2). Flores ...... floreana sp. n. Description 11. Elytra black with a large red spot in basal half Measurements and ratios. Body length: 6.5 mm; on either elytron. Burma, Thailand, south- width: 3.05 mm. Width/length of pronotum: 1.52; eastern China . . . . quadridentata Bates, 1892 width of pronotum/width of head: 1.25; length/ – Elytra with a black spot along suture which is width of elytra: 1.44; width of elytra/width of pro- widened behind scutellum and in apical half. notum 1.73. New Guinea, northern Australia ...... Colour (Fig. 3). Head including clypeus, labrum, ...... mucronata (Sloane, 1907) mandibles, and palpi, and pronotum light reddish, lateral margins of pronotum slightly paler than disk. Aristolebia paracrucigera sp. n. Elytra yellow, with a brown, narrowly cruciate pattern which leaves humerus and apex yellow; the sub- Figs 1, 3, 5 lateral stripe in basal half very indistinct. Antenna Type material. Holotype: ?, Indonesia Flores, 200m probably reddish, but most of antenna lacking. Legs Wolosambi 28-viii-1953 J.M.A. v. Groenendeal pale reddish. Lower surface more or less pale reddish. (ZMAN). Head (Fig. 5). Of moderate size. Eyes very large, semicircular, laterally remarkably protruded, orbits Etymology barely perceptible. Neck with fairly shallow trans- The name refers to the similarity in body size and verse impression. Labrum anteriorly straight, elytral pattern of this species with A. crucigera Baehr. 6-setose. Mentum with shallow, apically slightly rounded convexity. Glossa elongate, polysetose at Diagnosis apex, paraglossae wide, foliaceous, as long as glossa Small species for the genus Aristolebia, characterized and fused to it, densely setose at margin. Galea with by the cruciate elytral pattern. Distinguished from wide, rather depressed last segment that is extremely

Downloaded from Brill.com09/26/2021 06:33:32PM via free access 220 Tijdschrift voor Entomologie, volume 154, 2011

densely pilose. Lacinia large, with very elongate ter- Legs. Of average size. 4th tarsomeres of all legs wid- minal hook and rather dense row of teeth at inner ened, deeply (> half of tarsomere) excised, with dense margin. Palpi of normal size, very sparsely pilose. tarsal brush. 5th tarsomere with two rows of several Mentum asetose, but submentum with a very elon- setae on lower margin. Claws of all tarsi absent. gate seta at either side. Mandibles short and wide, Squamosity of male protarsus unknown, tarsi bro- evenly curved. Antennae broken behind 2nd anten- ken. nomere. Labrum and clypeus with fine and sparse Male genitalia. Both, aedeagus including parameres, punctures, frons and neck with some wrinkles and and genital ring very heavily sclerotized. Genital ring with coarse and rather dense punctures. Microreticu- very large, almost twice the length of the aedeagus, lation isodiametric, rather superficial, surface mod- narrow, gently convex, symmetric, with shoehorn- erately glossy. shaped, symmetric apex that is remarkably curved Pronotum (Fig. 5). Moderately wide. Anteriorly half inwards. Aedeagus moderately elongate, compact, about semicircular, widest slightly in front of mid- laterally slightly sinuate, lower surface gently con- dle, very little narrowed towards base, therefore base vex. No pilosity visisble. Orificium rather short, very much wider than apex. Apex straight, apical angles gently turned to the left side. Apex short, regularly very widely rounded, lateral margin convex, in basal triangular,very slightly turned upwards. Internal sac half almost straight, basal angle rectangular, though with very heavily sclerotized, denticulate, slightly slightly obtuse at tip, base in middle produced, lat- twisted plate in apical part near bottom, in basal part erally slightly convex. Apex narrowly margined, with several, little sclerotized folds. Parameres very base in middle margined. Anterior transverse sulcus dissimilar, asetose, left elongate, right odd-shaped. moderately deep, situated close to apex. Median line Female gonocoxites. Unknown. shallow. Posterior transverse sulcus deeply impressed. Variation. Unknown. Lateral margin anteriorly moderately wide, widened and widely explanate towards base. Disk gently con- Distribution vex. Anterior lateral seta situated about at anterior Flores, Lesser Sunda Islands. Recorded from the type third, slightly removed from margin, posterior seta locality only. situated at basal angle. Surface of disk with fine, very irregular strioles, with fine, scattered punctures, and Collecting circumstances with very superficial, about isodiametric microre- Not recorded. ticulation, glossy. Elytra (Fig. 3). Rather short and wide, widened Relationships towards apex, widest about at apical third, upper In view of its small body size, similar elytral pat- surface rather depressed. Humeri evenly rounded, tern, and the very similar, not markedly odd-shaped lateral margin evenly convex. External apical angle aedeagus A. paracrucigera probably is closely related shortly spined, Sstural angle angulate but not spined, to A. crucigera from Thailand. with a tiny denticle. Apex gently oblique, straight, only near external angles slightly excised. Striae Aristolebia floreana sp. n. complete, well impressed, feebly crenulate. Intervals Figs 2, 4, 6 considerably raised. 3rd interval with two setiferous punctures, both situated at inner margin of 3rd stria, Type material. Holotype: ?, Indonesia Flores, 200m the anterior one at about basal third, the posterior Wolosambi 28-VIII-1953 J.M.A. v. Groenendael one behind apical fourth. 14–15 marginal setifer- (ZMAN). ous punctures present, series slightly interrupted in middle. Intervals with an irregular row of moderately Etymology coarse punctures and with rather superficial, about The name refers to the occurrence of this species on isodiametric microreticulation which is arranged the island of Flores. in irregularly transverse rows, with traces of sparse, extremely short, erect pilosity which is visible only Diagnosis from laterally and at very high magnification, surface Rather large species for the genus Aristolebia, dis- rather glossy. Posterior wings fully developed. tinguished from all vividly patterned species except Lower surface. Prosternal process with an elongate A. oculata and A. triramosa from Sulawesi by the seta at middle. Lower surface with sparse but elon- unicolorous red-brown pronotum and the large red gate, slightly declined pilosity. Metepisternum elon- spot in the posterior half of the elytra. Distinguished gate, >2 as long as wide at anterior margin. Termi- from A. oculata by the presence of a contiguous dark nal sternum in male 4-setose. sublateral stripe on the elytra which encircles the

Downloaded from Brill.com09/26/2021 06:33:32PM via free access Baehr: Two new species of Aristolebia 221 humerus, brown head and pronotum, lesser body middle slightly produced, laterally slightly convex. size, and slightly wider prothorax and shorter elytra; Apex narrowly margined, base in middle not mar- and from A. triramosa Baehr by dark humerus, dark gined. Anterior transverse sulcus and median line apex of the elytra, brown head and pronotum, and shallow, sulcus situated close to apex. Posterior trans- narrower and less sinuate aedeagus with regularly tri- verse sulcus deeply impressed. Lateral margin anteri- angular apex. orly moderately wide, widened and widely explanate towards base. Disk gently convex. Anterior lateral Description seta situated about at anterior third, slightly removed Measurements and ratios. Body length: 8.9 mm; from margin, posterior seta situated at basal angle. width: 4.2 mm. Width/length of pronotum: 1.57; Surface of disk with fine, very irregular strioles, with width of pronotum/width of head: 1.31; length/ fine, scattered punctures, and with very superficial, width of elytra: 1.43; width of elytra/width of pro- isodiametric microreticulation, glossy. notum 1.67. Elytra (Fig. 4). Rather short and wide, widened Colour (Fig. 4). Head and pronotum reddish- towards apex, widest about at apical third, upper piceous, clypeus, labrum, mandibles, palpi, and surface rather depressed. Humeri evenly rounded, antenna reddish, elytra black with a pale reddish lateral margin evenly convex. External apical angle pattern, which consists of a large, oblique spot in angulate, forming a short, acute denticle. Sutural basal half which is confluent at suture but does not angle angulate but not spined, with a tiny denti- attain the lateral border, nor the humerus, and with cle, apex gently oblique, straight, only near exter- a circular spot from 2nd to 5th interval in apical half nal angles slightly excised. Striae complete, well which is slightly divided by brown colour at suture. impressed, finely crenulate. Intervals moderately The median basal area al well as the apex is black. raised, convex. 3rd interval with two setiferous punc- The very lateral margin is very narrowly reddish tures, both situated at inner margin of 3rd stria, the in basal half. Legs pale reddish with the tibiae very anterior one at about basal third, the posterior one slightly darker. Lower surface reddish-piceous, abdo- behind apical fourth. 14 marginal setiferous punc- men towards apex laterally darker. tures present, series slightly interrupted in middle. Head (Fig. 6). Of moderate size. Eyes very large, sem- Punctures of intervals sparse but distinct, irregularly icircular, laterally remarkably protruded, orbits not uniseriate, in parts biseriate. Intervals with rather perceptible. Neck with fairly deep transverse impres- superficial, about isodiametric microreticulation sion. Labrum anteriorly straight, 6-setose. Mentum which is arranged in irregularly transverse rows, with with very shallow, apically transverse or very slightly sparse, very short, erect pilosity which is visible only rounded convexity. Glossa elongate, polysetose at from laterally and at high magnification, surface apex, paraglossae wide, foliaceous, as long as glossa rather glossy. Posterior wings fully developed. and fused to it, densely setose at margin. Galea with Lower surface. Prosternal process with an elongate wide, rather depressed last segment that is extremely seta at middle. Lower surface with sparse but elon- densely pilose. Lacinia large, with very elongate ter- gate, erect to slightly declined pilosity. Metepister- minal hook and rather dense row of teeth at inner num elongate, > 4 as long as wide at anterior mar- margin. Palpi of normal size, very sparsely pilose. gin. Terminal sternum in male 4-setose. Mentum asetose, but submentum with a very elon- Legs. Of average size. 4th tarsomeres of all legs wid- gate seta at either side. Mandibles short and wide, ened, deeply (> half of tarsomere) excised, with dense evenly curved. Antenna elongate, surpassing base of tarsal brush. 5th tarsomere with two rows of several pronotum by three antennomeres, pilose from 4th setae on lower margin. Claws with 9 elongate teeth. antennomere, 6th and 7th antennomeres almost 3 1st-3rd tarsomeres of protarsus with two rows of adhe- as long as wide. Labrum and clypeus with fine and sive hairs. sparse punctures, frons and neck with some wrinkles Male genitalia (fig. 2). Both, aedeagus including and with coarse and rather dense punctures. Micro- parameres, and genital ring very heavily sclerotized. reticulation very superficial and fine, isodiametric, Genital ring very large, almost twice the length of the therefore surface rather glossy. aedeagus, narrow, gently convex, symmetric, with Pronotum (Fig. 6). Rather wide. Anteriorly half shoehorn-shaped, symmetric apex that is remark- about semicircular, widest slightly behind middle, ably curved inwards. Aedeagus moderately elongate, little narrowed towards base, therefore base much compact, both dorso-ventrally and laterally sinuate, wider than apex. Apex slightly concave, apical angles base with a narrow, median keel. Lower surface lat- very widely rounded, lateral margin convex, in basal erally with moderately elongate pilosity. Orificium oblique and almost straight, basal angle slightly rather short, very gently turned to left. Apex mod- more than rectangular, slightly obtuse at tip, base in erately elongate, straight, depressed, almost regularly

Downloaded from Brill.com09/26/2021 06:33:32PM via free access 222 Tijdschrift voor Entomologie, volume 154, 2011

triangular. Internal sac with very heavily sclerotized, number of species and better depict their distribu- denticulate, slightly twisted plate in apical part near tion. Probably the use of more adequate sampling bottom, in basal half with several little sclerotized methods, as for example fogging bark of logs and folds. Parameres very dissimilar, asetose, left elon- trunks and of leaves and canopy, will be of use. gate, right odd-shaped. Female gonocoxites. Unknown. Variation. Unknown. Acknowledgements I am very grateful to R. de Vos and B. Brugge Distribution (NCB Naturalis, Leiden), who kindly loaned me the Flores, Lesser Sunda Islands. Recorded only from the material. type locality.

Collecting circumstances References Not recorded. Baehr, M. 2004. A new species of the genus Aristolebia Bates from Thailand, with notes on some Papuan and Relationships Australian species (Insecta, Coleoptera, Carabidae, With respect to body size, shape, and quite similar Lebiinae). – Spixiana 27: 247–251. colour pattern of the elytra this species probably is Baehr, M. 2010. New species of the genera Lebia Latreille closely related to A. oculata and A. triramosa from and Aristolebia Bates from Indonesia (Coleoptera: Carabidae: Lebiini). 3nd supplement to “The genus Sulawesi and apparently forms a distinct species Lebia Latreille in the Australian-Papuan Region”. group with both latter species. – Stuttgarter Beiträge zur Naturkunde A, Neue Serie 3: 111–121. Remarks Bates, H.W. 1892. Viaggio di Leonardo Fea in Birmania e regione vicine. XLIV. List of the Carabidae. – Annali The discovery of two additional new species from del Museo Civico di Storia Naturale de Genova 32: the rather small island of Flores again demonstrates 267–428. that neither distribution nor number of species of Csiki, E. 1932. Coleopterorum Catalogus. Vol. III. Car- the genus Aristolebia are adequately known. The rea- abidae III: Pars 124, Harpalinae VII: 1279–1598. son for this most probably is the very unsatisfactory – W. Junk, Berlin. knowledge that we have about the habits of any spe- Darlington, P.J. Jr. 1968. The Carabid Beetles of New cies, so that specimens of Aristolebia are only casually Guinea. Part III. Harpalinae (continued): Perigonini collected and have not been, or presently cannot be, to Pseudomorphini. – Bulletin of the Museum of systematically sampled. Comparative Zoology 137: 1–253. Jedlicka, A. 1963. Monographie der Truncatipennen aus Although almost nothing has been reported about Ostasien. Lebiinae - Odacanthinae - Brachyninae ecology or ethology of any Aristolebia species, it (Coleoptera, Carabidae). – Entomologische Abhand- seems that they are arboreal (Darlington 1968) and lungen und Berichte aus dem Museum für Tierkunde may live primarily in rain forest. The wide tarsi and Dresden 28: 269–579. the strongly denticulate tarsal claws would support Kabak, I. 2003. Tribe Lebiini. – In: Löbl, I. & A. Smetana this assumption. However, whether they live pref- (eds). Catalogue of Palearctic Coleoptera 1: 408–439. erably on logs or trunks, or rather on leaves or in – Apollo Books, Stenstrup. the canopy is unknown. Darlington suggests that at Lorenz, W. 1998. Systematic list of extant ground beetles least the New Guinean species are diurnal, but he of the world (Insecta Coleoptera “Geadephaga”: Trach- also states that some specimens have been sampled pachidae and Carabidae incl. Paussinae, Cicindelinae. in light traps, which means that they are also roam- Rhysodidae). – Tutzing, printed by the author. 502 pp. ing about at night. Nothing is known about feeding Moore, B.P., T.A. Weir & J.E. Pyke 1987. Rhysodidae and habits and food, but the very large, protruding eyes Carabidae. In: Zoological Catalogue of Australia, 4: suggest that they have good eyes and may chase their 17–320. – Australian Government Publishing Service, Canberra. prey by eyesight. This would support their diurnal habits. It is to be expected that additional, more systematic, sampling activities in combination with better Received: 25 July 2011 knowledge of their habits will further increase the Accepted: 29 August 2011

Downloaded from Brill.com09/26/2021 06:33:32PM via free access