A revision of the Palearctic crassus-complex (Coleoptera, )

ANDERS N. NILSSON

Nilsson, A.N.: A revision of the Palearctic Ilybius crassas--complex (Coleoptera, Dytiscidae). [En revision av det palearktiska artkomplexet kring dykarbaggen I/y bius crassus (Coleoptera, Dytiscidae).1 - Ent. Tidskr. I l5 (l-2): 55-61. Uppsala, 1994. ISSN 0013-886x.

The three species of the Palearctic llybius crassus complex are revised. A lectotype is designatedof theWestPalearcticspecies/. crassus Thomson, 1856. Ilybiusnakaneisp.n.is described from South Sakhalin and Hokkaido. Ilybius weymarni J.Balfour-Browne, 1947, is made a junior synonym of /. chishimanus Kdno,1944, syn. n. This species is known from East Siberia, Primorye, North Kuril Islands, and Northeast China. Erichson, 1837, is reported from Mongolia for the first time.

A.N. Nilsson, Department of Ecology, University of Umed, S-901 87 Umed, Sweden.

Introduction (1989) Ilybius crassus Thomson, 1856, was long regarded redescribed/. weymarni from Sakhalin and Hokkaido, including illustrations male genitalia as a strictly central and northem European species, of providing a scholar example of a boreoalpine dist- evidently different from those of European I. ribution (Holdhaus & Lindroth 1939, Dettner 1977). crassus. The study of a large material from Siberia, Pri- Quite surprisingly,Zaitzev (1953) recorded the spe- and cies from "Siberia to the Far East" (of ). Pre- morye, Sakhalin Hokkaido has convinced me the presence three different species the vious to Zaiazev's widening of the range of 1. of of in cras.sus-complex. lrue crassus, KOno ( 19,14) had described /. chishimanus The I. crassus is seemingly from the North Kuril Islands, and Balfour-Browne European, and two species occur in the Far East, which one has to be described as new. As have ( 1947) had described 1. weymarni from Manchuria of I not seen material as being very close to I. crassus. any from West Siberia it is still For a long period the question seemed open an open question which species of the complex, if whether the East Palearctic populations were any, that occurs in this region. conspecific with /. crassas or not. Gu6orguiev ( 1968, 1972) enoneously recorded L crassus from Mon- Abbreviations golia (see below), and Sat6 & Nilsson (1988) The following abbreviations are used for museums synonymized I. chishimanus with 1. crassas. The and other collections cited: (BML) The Natural presence of L crassus in the Far East was also ve- History Museum, London, (CAL) coll. Angus, Lon- rified by Lafer (1989). don, (CNU) coll. Nilsson, UmeA, (CTC) coll. T. The status of l. weymarni has remained unclear, Nakane, Chiba, (NSMT) National Science Museum, and Larson (1987) suggested that it was a junior Tokyo, (SMNH) Swedish Museum of Natural His- synonym of I. crassus. On the other hand, Nakane tory, Stockholm, (TMB) Term6szettudomiinyi

55 Anders N. Ni/sson Ent. Tidskr. ll5 (1994)

- Penis in lateral view less strongly tapering to blunt apex (Fig. 7); dorsal groove ending on left side of apex (Fig. 6). Male anterior metatarsal claw apically pointed (Fig. 10). Rugosity of male abdominal sternum 6 present also medially. Metasternal wing relatively broader, WC/IVS 3.0 or less in most spe- cimens...... nakanei 2. Penis more evenly tapering to apex in lateral view (Fig. 3); dorsal groove not broadly visible subapically when viewed from right side (Fig. 2) K6no, paramere, internal Fig. l. Ilybius chishimanus crassus view. Scale har 0.5 mm. - Penis more abruptly tapering to apex in lateral view (Fig. 5); dorsal groove broadly visible when Hanens paramer sedd frdn insidan. viewed from right side (Fig.4)...... chishimanus

Descriptions of species Mrizeum, Budapest, (ZIS) Zoological Institute (Aca- de my of S c ience s ), S t. Pete rsb urg, (ZlY ) Zoolo gical I lybius crassus Thomson Institute (Academy of Sciences), Vladivostok, (ZML) Zoological Museum, Lund. Dytiscus fenestratas Fabricius, l78l: var. c Gyllenhal, 1808:498 (misident.); var. b Zetterstedt, 1828:215 Characterization of the crassus-complex (misident.); vars. b and c Zetterstedt, 1837:l3l (misi- dent.). The following combination of characters separates llybius crossus Thomson, 1856:224 (orig. descr.); Zim- species of the crassas-complex from other Ilybius- merrnann & Gschwendtner 1935:83 (descr.); Holdhaus Characters are given as plesio- (P) or apomorphic & Lindroth 1939:148 (distr.). (A) within the using Larson's (1987) polar- ity decisions: (l P) antenna without apical in- Type locality. "Lappland" (Sweden). fuscation, (2 P) body black, (3 A) body with dorsal Type material. Lectotype d here designated in surface aeneous, (4 ?) body of medium size, total coll. Thomson (ZML) labelled: black square, "d", length l0-12.5 mm, (5 A) metastemal wing rela- and my lectotype label. - Paralectotypes 8Cfi9 here tively narrow, (6 A) metacoxal plate with longitu- designated in coll. Zetterstedt (ZML) under dinal strioles frequently intersecting, (7 P) metatibia "Dytiscus fenestratus", all except ld provided with with ventral face punctate, (8 A) male sternum 6 black square and the following additional labels: rugose with posteromedial keel reduced, (9 A) para- ld "Var. b. d.", 19 "Var. b. 9.", ld "Var. c. d.", mere with sucker setae on mesal face (Fig. l), (10 t9 "Var. c.9.", td "Var. d. Yar.b.Zett. Fn. Lapp.", ?) male metatarsomeres 1-3 provided with ventral td "Var. c.Zett.Fn. Lapp. Lycksele" (without black setal fringe, ( I I A) male metatarsomeres 1-4 ridged, square), 1d "65.", "Colymb. fenestratus c. Gyll. a (12 A) male anterior metatarsal claw blade-like with Schcinh. L"pp.", 19 "65. Sch.", and my ventral margin more or less straight, ( 13 A) female paralectotype labels. sternum 6 with marginal bead obsolete on outer Additional material. Forty specimens from angle of medial emargination. northem Sweden in CNU were examined. Notes. Thomson's description of crassus was Key to species of crassus-complex for males based on specimens collected by Zetterstedt in 1. Penis in lateral view more strongly tapering Lapland, i.e. types may be found in both coll. Thom- subapically to blunt apex (Figs 3, 5); dorsal groove son and coll. Zetterstedt. Only one male in coll. ending on right side of apex (Figs 2, 4). Male Thomson can without doubt be connected with anterior metatarsal claw apically truncate (Figs 8- Zetterstedt. This male, selected as lectotype above, 9). Rugosity of male abdominal sternum 6 more is provided with a minute black square, used by strongly reduced medially. Metasternal wing Zetterstedt for the material collected on his 1832 relatively narrower, WCAMS > 3.0 in most speci- expedition to South Lapland (now Ly lpm) (Da- mens..,...... ,,,...... 2 nielsson in litt.). The five specimens in coll. Thom-

56 Ent. Tidskr. I 15 (1994) T he I ly bius c rass us - complex son seen by Brinck (1942) are not part ofthe type material, and one male belongs to L quadriguttatus

(Lacordaire, 1 835). Based on his "Insecta Lapponica" collection (ZML), the Dytiscus fenestratus of Zetterstedt ( 1837) is identical with 1. subaeneus Eichson, I 837, whereas his varieties b and c refer to I. crassus. Seidlitz (1887) and Scholz (1915) both listed /. ovatus Hochhuth, 1871, as ajunior synonyn of1. crassus. However, as shown by Zaitzev (19O8) Hochhuth's name is a junior synonym of I . similis Thomson, 1856. Description. Measurements and ratios as in Table Figs 2-7. Ilybius, penis apex in dorsal view (2, 4, 6) and l. Metasternal wing relatively narrow. Male stemum penis in lateral view (3, 5 ,7 ). -2-3. I. crassus Thomson, 6 with rugosity reduced medially. Male anterior Sweden. -4-5. I. chishinanus K6no, Primorye. -6-7. I. metatarsal claw apically truncate (Fig. 8). Penis nakanei sp. n., Sakhalin. Scale bar 0.5 mm. (Figs 2-3) evenly tapering to rounded apex; dorsal groove ending on right side ofapical knob, invisible Hanens penis sedd frdn sidan (3, 5, 7), resp penis- in lateral view. spetsen sedd uppifrdn (2, 4, 6). Distribution. Central and North east to the Urals. (Dettner 1977, Braasch 1989), (Schaeflein 1989), (Galewski I 966), Czechoslovakia (Riha 1992), (Holmen I 979), Fennoscandia (Lindroth I 960), Russia. The eastemmost literature records found are from Mezen in the Arkhangelsk Prov. (Poppius 1908), and from Kuznetsk in the Penzensk Prov. (Zaitzev 1928). Moreover, Zailzev (1915) reported on one speci- men in coll. Motschulsky labelled "Ural", conside- redby Zaitzev to originate from the central part.

I lybius chishimanus K6no

Ilybius ater (De Geer, 1774): Kano 1933:97 (misident.); Kamiya 1935:506 (misident.); Kamiya 1938:40 (in part, misident.). Ilybius crassus Thomson, 1856: Zaitzev 1953:.278 (in part, misident.); Sat6 & Nilsson 1988:126 (misident.); Figs 8-10. Ilybius, male protarsomere 5 with claws, Nakane 1989:28 (misident.); Lafer 1989:249 (in part, anterior view. -8. I. crassus Thomson, Sweden. -9. I. misident.). chishimanus K6no, Primorye. -10. L nakanei sp. n., Ilybius chishimanus K6no, l9M:80 (orig. descr.). Sakhalin. Scale bar 0.2 mm. Ilybius weymarri J.Balfour-Browne, 1947 :446 (orig. descr.), syn. n. Hanens sista baktarssegment med klor sett framifrdn.

Type locality: of chishimanns "Suribachi Bay, 40 M. Weymarn", "Ilybius weymami Hototype! J. Paramusir Island" (here translated) (Russia, North Balfour-Browne det.", "Brit. Mus. 1948- 339." Kuril Islands); of weymarni "Manchuria, Kaolint- Paratype 9 in el\4t labelled: "Allotype", "Cheng- su" (China, Heilungkiang Prov.). chin, Lesser Khingan, Manchukuo", "20.VI.38 M. Type material. Holotype Q of chishimanus seen Weymarn", "Brit. Mus. 1948-339", "Ilybius wey- in NSMT. - Holotype d of weymanri in BML la- marni sp.n. J. Balfour-Browne det." belled: "Holotype", "Kaolintsu, Manchuria 20.VIII.- Additional material. Russia: Transbaikalien 1d

57 Anders N. Ni/sson Ent. Tidskr. I l5 (1994) leg. Leder & Reitter (TMB); 45 km S of Irkutsk l 3.viii. l 968 ld29 lel. Lindroth (ZML); Tibelti, Irkut valley, 28 km W of L. Baikal 8-15.vi. 1970 19 LeC. R.B.Angus (CAL); Primorye: 5 km W Zanadvorovka I 1.vii.1992 3 inds.; l0 km N Slavy- anka 1l.vii.l992 I ind.; 6 km W Ryazanovka 15.v ii.1992 2 inds. ; Ussuriski Reserve, Kaminushka t8-19.vii.1992 49 inds.; 22 km N Vladivostok, Sput- nik Station 25.v1i.1992 9 inds.; 35 km NW Vladivostok 25.vii.1992 8 inds. Ieg. A.N. Nilsson (CNU, SMNH); 22 km N Vladivostok, Sputnik Station 13.vi.1993 7 inds. leg. S. Kholin & A.N. Nilsson (CNU); Paramusir Island, Noda Bay, Chishima, 27.vii.l926,ld leg. H. Doi (CTC). Description. Measurements and ratios as in Table l. Metastemal wing relatively nalrow. Male stemum 6 with rugosity more or less reduced medially. Male anterior metatarsal claw apically truncate (Fig. 9). Penis (Figs 4-5) more abruptly tapering to rounded apex; dorsal groove ending on right side of apical knob, broadly visible in lateral view. Distribution (Fig. 12). East Russia and North China. In Russia known from Irkutsk to South Primorye and from Paramusir of the North Kuril Islands. Fig. I l. Ilybius nakanei sp. n., habitus of male poratype Natural history. In Primorye, I. c his hi manus w as Hokkaido. Scale bar 1.0 mm. Del. G. Marklund. collected in various ponds, ditches and stagnant parts from of streams. Most specimens were hiding among Hahitusteckning av dykaren llybius nakanei vilken hrir dense vegetation or debris. Seemingly most abun- heskrivs frdn stidra Sakhalin och Hokkaido. Arten har dant in forest. sedan 1938 felaktigt fdrts in under fyra andra orter. Note. The identity of I. chishimanas was fixed Dess endemiska stotus kunde fastslds fdrst efter egna in- pd och ldn av material by examination of a topotypic male in CTC. samlingar Sakhalin frdn iapan- ska kollegor. nakanei sp. n. Ilybius P7,919-93 S. Kholin"; ld "Russia, Sakhalin, (De Geer, 1774): Kamiya 1938:40 (in part, Kholmsk Pl2,l4l9-93 S.Kholin"; ldl9 "Russia, misident.). Sakhalin, Kholmsk nr Pl l, l0l9-93 S.Kholin"; ld Ilybius crassus Thomson, 1856: Lafer 1989:249 (in part, Russia, Sakhalin, Kholmsk: Pionery 22-26.vi.1993 misident.). Leg. S. Kholin/A. Nilsson"; ld "saghalin Oguma"; Ilybius chishinanus K6no, 1944: Nakane 1964:6 (misi- tdtP "Iwaobetsu, Shari T., Abashiri, Hokkaido, dent.); Sat6 1985: 194 (misident.). Japan,29th, August, 1988, leg. Y. & T. Abe"; 8d89 Ilybius weymarri J.Balfour-Browne, 1947: Nakane "Aizankei 17 AUG '54 M.Inoue"; ld "Chiru- 198929 (misident.); Mori & Kitayama 1993:120 (misident.). watsunai, Hokkaido, 25.VIII. 1989 K. Ijima", and my paratype labels. Holotype deposited in ZIS; Type locality. Shevtjenko Valley, Kholmsk, paratypes three in ZlY, one in SMNH, l1 in CNU, Sakhalin, Russia. and l6 in CTC. Type material. Holotype d labelled "Russia, Etymology. The specific epithet is a noun in the Sakhalin, Kholmsk, Shevtjenko, 21.vi.1993 Leg. genitive case derived from the name of Dr T. S. Kholin/ A.Nilsson" and my holotype label. Nakane, Chiba, who first recognized I. nakanei as Paratypes 20d109: 3d with same locality label as a separate species and illustrated the genitalia (as holotype; 2d "Russia: Sakhalin, Pionery f .ix.92 S. I. weymarni). Kholin"; ld "Russia, Sakhalin, Kholmsk, Pionery Description. Habitus as in Fig. I l. Measurements

58 Ent. Tidskr. ll5 (1994) T he I ly b ius crassus - comp lex

Tab. l. Selected measurements (mm) and ratios (mean x SD)for the three species in the Ilybius crassus complex: (TL-h) total body length without head, (MW) marimum body width, and (WCIWS) ratio between width of metacoxa and width of metasternum. Values represent five specimens of each sex.

Ndgra mdtt (mm) och kvoter (medelvtirde x SD) f6r Ilybius crassus-komplexets tre arter: (TL-h) total kroppsltingd utan huvud, (MW) maximal kroppsbredd, och (WCIWS) kvot mellan bredd av bakhdftplatta och bakbrdstets s idofly ge l.

Species TL-hA,IW

chishimanus 10.3 t 0.7 6.0 t0.5 1.71 t 0.03 3.35 tO.22 crossus 10.5 t 0.2 6.1 t 0.1 1.72 t0.OZ 3.28 t 0.19 nakanei 10.3t0.2 5.9t0.1 1.75t0.03 3.02t0.07

except that the presence of striolate punctures on ventral face of metafemur is more poorly developed. The reduced medial carina on male sternum 6 of the crassus-complex species suggests that 1. subaeneus isthe sister-species, whereas the reduced bead on lateral angles of female sternum 6 suggests a closer relationship with I. pleuriticus. (1947) Fig. 12. Known records of llybius chishimanus Kbno Balfour-Browne gave the following three (open triangles) ond I. nakanei sp. n. (filled triangles). characters to separate his weymarni from European crassus: (1) prostemal process more produced Kdnda fynd av I. chishimanus (ofyllda trianglar) och L behind, (2) male anterior protarsal claw more nakanei ([y I I da t r ian g lar ). slender, and (3) rugosity of male abdominal stemum 6 more distinct. When comparing series of L crassus and ratios as in Table 1. Metastemal wing relatively and I. chishimanus I have found that intra- and broad. Male sternum 6 with rugosity present also interspecific differences among these characters medially. Male anterior metatarsal claw apically cannot be separated from each other. However, I. pointed (Fig. l0). Penis (Figs 6-7) subapically broad nakane differs from the two other species in the and very slightly tapering to rounded apex: dorsal third character as short rugae are present also groove ending on left side of apical knob, invisible medially on stemum 6. in lateral view. Gu6orguiev (1968,1972) recorded a single male Distribution (Fig. l2). Known only from South of I. crassus from Mongolia. I have examined this Sakhalin in Russia and Hokkaido in Japan. male (in TMB) and identified it as I. subaeneus Natural history. On Sakhalin specimens were Erichson. This is the first record ofthis species from found among moss or emergent vegetation at the Mongolia. margin of ponds and in seeping water in a fen. No significant interspecific differences were found in body length among the species of the crassus- complex (Tab. l). I. nakanei had a significantly Discussion lower length to width ratio than the two other spe- Larson (1987) suggested that L crassus belonged cies (t-test, p= 0.04 for crassus and 0.01 for to the same clade as the Holarctic I. subaeneus Erich- chishimanus). The relative width of the metasternal son, 1837, and the Nearctic /. p/euriticus LeConte, wing (WC/IilS, Tab. 1) was significantly lower in I 850. All three species of the crassus-complex share I. nakanei than in the two other species (t-test, p= Larson'S synapomorphies attributed to this clade, 0.001).

59 Anders N. Nilsson Ent. Tidskr. 115 (1994) Acknowledgements Lafer, G.Sh. 1989. Sem. Dytiscidae - Plavuntji. - Opre- delitel Nasekomich Dalnego Vostoka SSSR 3(1):229- The following persons are thanked for the loan of speci- 253. mens from collections under their care: Mr R. Daniels- Larson, D.J. 1987. Revision of North American species Lund, Dr T. Nakane, Chiba, Dr O. Merkl, Budapest. son, of llybius Erichson (Coleoptera: Dytiscidae), with Mr S. Kholin, Vladivostok, is thanked for valuable help systematic notes on palaearctic species. - Jl. N. Y. ent' in getting material from Sakhalin. Soc.95:341- 413. Lindroth, C.H. (red. cur.) 1960. Catalogus Coleop- References terorum Fennoscandiae et Daniae. Lund. Balfour-Browne, J. 1947 (1946). The aquatic Coleop- Mori, M. & Kitayama, A. 1993. Dytiscoidea of Japan. tera of Manchuria (Weymarn collection). - Annls 218 pp. [In Japanese] Mag. nat. Hist. (11) 13:433-460. Nakane, T. 1964. The Coleoptera () of Japan 48. Braasch, D. 1989. Ilybius crassus Thomson - eiene Family Dytiscidae (continued). - Fragmen. Coleop- boreomontane Art in der norddeutschen Tiefebene terologica Japonica 2:5-8. [In Japanese] (Insecta, Coleoptera: Dytiscidae). - Faun. Abh. Mus. Nakane, T. 1989. The beetles ofJapan (new series) 88. - Tierkd. Dresden I 7 :95-96. Nature and 24( I l.):27 -31 . [In Japanese] Brinck, P. 1942. Die von J.W Zetterstedt und C.G. Poppius, B. 1908. Weitere Beitriige zur Kenntnis der Thomson neubeschriebenen Halipliden und Dytisci- Coleopteren-Fauna des nordtjstlichen europiiischen den. - Kgl. fysiogr. Siillsk. Lund Fiirhandl. l2(11):l- Russlands. - Acta Soc. Fauna Flora fenn. 3 I (6): 1 -30. t'l . Riha, P. 1992. Verzeichnis der tschechoslowakischen Dettner, K. 1977. Zur tiergeographischen Stellung aqua- Arten der Familien Noteridae und Dytiscidae (Cole- tiler Coleopteren des Nordschwarzwaldes. - Ent. Bl. optera). - Ent. Nachr. Berichte 36:19-28. Biol. Syst. Kiifer 73: 149- 160. Sat6, M. 1985. Dytiscidae, pp. 183-201, pls. 34-36. - In: Galewski, K. 1966. Developmental stages of the Central U6no, S.-I., Kurosawa, Y. & Sat6, M. (eds.). The Co- European species of //ybias Erichson (Coleoptera, leoptera of Japan in color. Vo[. 2. Hoikusha Publ. Co. Dytiscidae). - Polskie Pismo ent. 36:117 -2ll + 93 pl. Osaka. [In Japanese] Gu6orguiev, V.B. 1968. Coleoptera: Haliplidae, Dytisci- Sat6, M. & Nilsson, A.N. 1988. Notes on //yDias dae, Gyrinidae II. Ergebnisse der zoologischen Fors- (Coleoptera, Dytiscidae) from Japan and her chungen vooDr.Z. Kaszab in der Mongolei. - Izves- neighbourhood. - Elytra, Tokyo I 6: I 26. tija na Zoologitjeskija Institut s Musei Sofra2T:23- Schaeflein, H. 1989. Dritter Beitrag zur Dytisciden- 29. fauna Mitteleuropas (Coleoptera) mit dkologischen Gu6orguiev, Y.B. 1972. Haliplidae, Dytiscidae, Gyri- und nomenklatorischen Anmerkungen. - Stuttgarter nidae IV. Ergebnisse der zoologischen Forschungen Beitr. Naturk. (A) 430: I -39. von Dr. Z. Kaszab in der Mongolei (Coleoptera). - Scholz, R. 1915. Beitrag zur Kenntnis und Verbreitung Faunistische Abhandlungen staatliches Museum fiir europ?iischer Wasserkiifer (Haliplidae, Dytiscidae). - Tierkunde in Dresden 4:31-44. Ent. Bl. Biol. Syst. Kdfer ll:232-250. Gyllenhal, L. 1808. Insecta Suecica descripta. Classis I. Seidlitz, G.C.M. 1887. Fauna Baltica. Ed. 2. Ktinigs- Coleoptera slve Eleutherata. Pars l. Scaris, XII + 572 berg, [0+LVI+8l8pp. pp. Thomson, C.G. 1856. Ofversigt af de arter inom famil- Holdhaus, K. & Lindroth, C.H. 1939. Die europiiischen jen Dytisci, som blifvit antriiffade pA Skandinaviska Koleopteren mit boreoalpiner Verbreitung. - Ann. na- halftin. - K. Svenska VetenskAkad. Handl. turhist. Mus. Wien 50:123-293. 1854(12):l8l-237. Holmen, M. 1979. Fire vandkalve nye for Danmark med Zaitzev, F.A. 1908. On the water fauna of the oplysninger om deres udbredelse og levevis (Coleop- Kiev gouvernement. - Horae Soc. ent. Ross. 38:- tera: Dytiscidae). - Ent. Meddr 47:89-95. CLVII-CLXIII. IIn Russian] Kamiya, K. 1935. The water beetles from the Northern Zaitzev, F. 1915. Vodyanye zhuki kollektsii Mochul- Kuriles. -Zool.Mag. Japan 47:503-508 [In Japanese] skogo. L Haliplidae, Dytiscidae, Gyrinidae. -Ezheg. Kamiya, K. 1938. A systematic study of the Japanese zool. Muz. 2O:239-295. Dytiscidae. - J. Tokyo Agricult. Univ.5: l-68 + 7 pls. Zaitzev, F.A. 1928. Materialen zur Fauna der Was- Kano, H. 1933. Coleopterous insects from the Northern serkiifer der Gouvernements Saratow und Samara. - Kuriles, with some considerations on the -fauna Arb. Biol. Wolga-Station l0( I ): 1-27. [In Russian] of the Kurile Islands. - Bull. biogeogr. Soc. Japan Zaiazev, F.A. 1953. Nasekomye zhestkokrylye. Plavunt- 4(2):91- 121. sovye i vertyachki. - Fauna SSSR 58: t -376. K6no, H. 1944. Die Kiifer-Fauna der Nord-Kurilen. XI. Zetterstedt, J.W. 1828. Fauna insectorum Lapponica. Beitrag zur Kenntnis der K?iferfauna der Kurilen. - Pars I. Hammone, XX + 563 pp. Chishima Gakujutsu-ch6sa-kenky0-tai Hdkokusho Zetterstedt, J.W. 1837-1840. Insecta Lapponica. Sectio l:74-92 lln Japanesel prima. Lipsiae, 314 pp.

60 Ent. Tidskr. ll5 (1994) The I lybius crassus-comp lex

Zimmermann, A. & Gschwendtner, L. 1935. Mono- "crassus" Ar ett artkomplex bestAende av tre arter: graphie der paliiarktischen Dytisciden. VI. Colymbe- (l) c r as s us i Europa, (2) c hi s himanus (= w s, n', (2. tinae Teil). - Koleopt. Rdschau 2l:61-92. pA det asiatiska fastlandet, och (3) nakanei ^o,vilken hiir beskrivs frln den ryska stillahavscin Sakhalin och frAn Hokkaido, Japans nordligaste ci. De tre artema skiljer sig huvudsakligen it i formen pA han- Sammanfattning ens kcinsorgan. De djur som tidigare uppgivits som Ilybius crassus 6r en Thomson medelstor svart dy- crassus fr6n Mongoliet tillhcir istdllet 1. subaeneus kare som ursprungligen beskrevs frAn Sverige. Med Erichson, tidigare ej kiind frAn Mongoliet. Kunska- tiden utvidgades artens kiinda utbredningsomride pen om flertalet insekters utbredning och taxonomi giilla pA till att hela norra Eurasien. Jag har tittat i Asien 5r fortfarande dAlig. Di mtnga arter anses det tilgaingliga materialet av arten frAn Asien in- vara gemensamma med Europa och Sverige inne- klusive typmaterial av I. chishimanus K6no frAn biir detta even att vi fortfarande vet ratt lite om norra Kurilema och av I. weymarni J.Balfour- manga av vAra arters viirldsutbredning. Browne frln nordcistra Kina. Min slutsats iir att

Ny bok om jordldparlarver

Luff, M.L. 1993. The Carabidae (Coleop- senterar hiir den lAnga danska traditionen av hcig- tera) larvae of Fennoscandia and Den- kvalitativa larvstudier och Iyfter speciellt fram Sven mark. F auna Entomologica Scandinavica Gisle Larssons stora betydelse. Vi fir bl a veta att 27.186 sidor, 586 svartvita teckningar. Ba- arbetet med frireliggande bok pibcirjades redan I 940 och att den nu tack vare Martin Luffs genomgri- serad pe eff manuskript av S.G. Larsson. pande omarbetning av Larssons manuskript kan ges ISBN 90 04 09836 4. Pris ca 400 SEK. en internationell publik. Vikten av att kunna identifiera larver har cikat i Jag noterade tidigt att olika skalbaggslarver behand- och med jordlciparnas framtrddande plats inom den lades mycket professionellt i serien Danmarks ekologiska forskningen. Jag tiinker dA speciellt pA Fauna, och samtidigt relativt anonymt, som i en Den Boer-skolans populationsekologiska arbeten, bisats. Fcir vissa grupper som jordlcipare fanns hiir liksom pA studiet av livshistoriestrategier (samman- liinge den i siirklass bdsta presentationen av euro- fattade av Thiele 1977). Jag vill minnas att det var peiska larver - skriven pA danska! John Spence som tidigt pApekade vikten av att titta Bakgrunden till detta fcirhAllande ges i Niets P. pt larverna i studier av olika arters samexistens och Kristensens fcirord till fcireliggande volym. Han pre- eventuella konkurrens. Detta friimst pga larvernas

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