Species Diversity, 1998, 3, 75-80 Recent Collections of Odonata from the Kuril Islands Dennis R. Paulson1, Noboru Minakawa2, and Robert I. Gara2 'Slater Museum ofNatural History, University of Puget Sound, Tacoma, WA 98416, USA 2College ofForest Resources, University of Washington, Seattle, WA 98125, USA (Received 9 December 1996; Accepted 30 September 1997) Seventeen species of Odonata were collected in 1994-1996 from 21 localities in the Kuril Islands. Mnais pruinosa, Aeshna nigroflava, Cordulia aenea, and Pseudothemis zonata are first records from the archipelago, and the last species represents a significant range extension from Honshu. Enallagma belyshevi is synonymized with E. circulatum, which is considered a valid species rather than a subspecies of E. boreale. Key Words: Enallagma, Kuril Islands, Odonata. Introduction During a joint American/Japanese/Russian biotic survey of the Kuril Islands during the summers of 1994, 1995, and 1996, Odonata were collected in the southern islands of Zelionyi, Kunashir, and Iturup. All specimens are currently housed at the School of Fisheries, University of Washington, Seattle, Washington. The Kuril Island Archipelago forms the eastern boundary of the Sea of Okhotsk and a bridge between Hokkaido (43°23'N, 145°49'E), the northernmost island of Japan, and the Russian peninsula of Kamchatka (50°52'N, 156°32'E). The island chain consists of 34 islands, ranging in size from 0.15 to 3200km2. All of the Kuril Islands are volcanic in origin, ranging in age from Upper Cretaceous to late Pleistocene. The islands are often covered with fog in summer and by snow the rest of the year. Each island's fauna has been shaped by its own geological history, channel depths, and currents, as well as the proximity to mainland biota. List of Localities 1. Zelionyi, unnamed stream draining NW corner of Lake Utinoye, lined with tall sedges, slow flow, thick soft mud bottom, 43°29,12" N, 146°06,42" E; 5 Aug 1994, R. I. Gara (RIG hereafter), N. Minakawa (NM hereafter) (ZE-94-NM-001) 2. Zelionyi, Lake Utinoye, funcus at edge of lake with sandy/pebble bottom, 43°29'24" N, 146°06*48" E; 5 Aug 1994, RIG, NM (ZE-94-NM-002) 3. Zelionyi, SE of Lake Utinoye within 3km of W coast of island, ponds and creeks through boggy area, 43°28'24" N, 146o08'16" E; 6 Aug 1994, RIG, NM (ZE-94- NM-004) 4. Zelionyi, Lake Kamenskoye, semisoft mud bottom with emergent grasses, 43°30'12" N, 146°06'12" E; 6 Aug 1994, RIG, NM (ZE-94-NM-005) 5. Zelionyi, between Lakes Utinoye and Sredneye, coastal grass meadow, 43° 29'42" N, 146°07'36" E; 6 Aug 1994, T. W. Pietsch, B. K. Urbain (BKU hereafter) (ZE-94-TWP-004) 76 D. R. Paulson, N. Minakawa, and R. I. Gara 6. Kunashir, Lake Aliger, emergent sedges and Juncus around edges, surrounded by Picea/Alnus/Salix forest; 44°02'59" N, 145°44'18" E; 31 Jul 1994, RIG, NM, V. V. Teslenko (KU-94-NM-001) 7. Kunashir, unnamed stream at Goryachiye Kluychi (hot springs), in section just above thermal pools with cobble, pebble, and sand bottom, shaded, periphyton growing on larger rocks, 44°00'48" N, 145°41'06" E; 3 Aug 1994, NM (KU-94-NM-016) 8. Kunashir, Lesnaya River near junction with Kislyi River, limestone with pebble and cobble bottom, width about 25m, 44°00'54" N, 145°44'24" E; 4 Aug 1994, RIG, NM (KU-94-NM-018) 9. Kunashir, Lake Aliger, grasses and low Salix surrounding lake, 44°02'59" N, 145°44'18" E; 1 Sep 1995, P. Oberg (PO hereafter), S. Gage (KU-95-PO-125) 10. Kunashir, unnamed stream feeding Lake Lagunnoye, riparian vegetation, stream lm wide, 0.2-0.5m deep, 44°03'06" N, 145°44'48" E; 1 Sep 1995, NM (KU-95-PO- 127) 11. Kunashir, environs of Kislyi Hot Springs, in side channels of river, riparian vegetation of conifers, Betula, Salix, and grasses, 44°00'10" N, 145°46'00" E; 2 Sep 1995, D. E. Hoekstra, PO, NM (KU-95-PO-128) 12. Kunashir, bog adjacent to Kislyi River, 25Xl0m, surrounded by grasses and conifer forest, 44°00'03" N, 145°46'07" E; 2 Sep 1995, NM (KU-95-PO-130) 13. Kunashir, environs of Kislyi River, riparian vegetation of bamboo, 44°00'03" N, 145°46'07" E; 2 Sep 1995, PO (KU-95-PO-134) 14. Kunashir, geothermal spring and lake 17km W of Yuzhno-Kurilsk, open area around geothermal ponds and above surface of geothermal stream, 44°00'25" N, 145°40*34" E; 25 Aug 1996, NM, PO (KU-96-NM-042) 15. Kunashir, Lake Aliger, open areas, sedges and tall grasses surrounding lake and nearby ponds about 100m from sea, 44°02'59" N, 145°44'18" E; 26 Aug 1996, NM, PO (KU-96-PO-076) 16. Iturup, Lake Natasha, environs of Lesozavodskyi Village, mixed areas of silt, hard sand, soft sand, and pebbles with detritus; 12 Aug 1994, RIG, NM (IT-94-RG- 001) 17. Iturup, unnamed river near Godbaza River inland from Dobroye Nachalo Bay, stream mostly shaded by Alnus, Betula, and Ulmus but some areas open; 14 Aug 1994, RIG, NM (IT-94-RG-004) 18. Iturup, Kurilsk, Lake Lebedinoye, oligotrophic but with emerging angio- sperms, including sedges, along shore; 17 Aug 1994, RIG, NM (IT-94-RG-007) 19. Iturup, Reidovo, Reidovoye Lake, shore vegetation Betula, Alnus, Ulmus, Taxus, and Picea; 18 Aug 1994, RIG, NM (IT-94-RG-009) 20. Iturup, Dobroye Lake, inland from Dobroye Nachalo Bay, wet grass meadow along edge, with thickets of various shrubs, 44°44'12" N; 147°13'18" E; 13 Aug 1994, BKU, J. A. Lopez (IT-94-TWP-003) 21. Iturup, Lake Natasha, about 1km inland from Dobroye Nachalo Bay, vegeta tion around the lake shore Salix, sedges, and tall grasses, 44°46'21" N, 147° 11'40" E; 22 Aug 1996, NM, PO (IT-96-PO-069) Note 6, 9, and 15 are the same locality. Kuril Islands Odonata 77 Species Recorded CALOPTERYGIDAE Mnais pruinosa costalis Selys, 1869. Kunashir 14 (2o3o7'); first Kuril record. This is the northernmost of the three Mnais taxa recognized from Japan, considered a subspecies of M. pruinosa Selys, 1853 by Asahina (1976) but possibly deserving species status (Suzuki etal. 1980). Only one of the two males (both hyaline-winged) shows the yellow anterior half of the poststernum characteristic of M. p. costalis according to Asahina (1976), but similar polymorphism occurs in Japan as well (Suzuki and Eguchi 1979). LESTIDAE Lestes sponsa (Hansemann, 1823). Kunashir 11 (3-f £). COENAGRIONIDAE Coenagrion ecornutum (Selys, 1872). Kunashir 15 (2c/1 o71). This continental species barely occurs on the islands, in the Kurils and Hokkaido (Tsuda 1991). Enallagma circulatum Selys, 1883. Zelionyi 1 (1<A 1 *), 2 (lo*. 1 *), 3 (lo*), 4 (lo", 1*,2 larvae), 5 (3^^); Kunashir 6 (7c/V, 2£ £, 2 larvae), 10 (lo*), 15 (11 0*0*, 1*); Iturup 18(6c/V, IS), 19 (30*0*), 20 (lo^), 21 (12c/V, 1*); first Zelionyi record. Recorded from the Kuril Islands as E. sp. by Okumura (1941), as E. deserti yezoensis by Asahina (1958), and as E. circulatum by Belyshev et al. (1976), this taxon is called E. boreale circulatum in Japan (Ishida et al. 1988, Bridges 1993). Japanese populations cannot be conspecific with Enallagma boreale Selys, 1876, as both a single male from Hokkaido in the senior author's collection and the series here examined from the Kurils, although superficially like E. boreale, differ from that species structurally in all characters used to distinguish similar species of Enallagma, namely the male superior appendages and penis and the female mesostigmal laminae (Walker 1953; Donnelly 1963). Although we have no specimens with which to compare them, these populations are also unlikely to be conspecific with E. deserti (Selys, 1871), as formerly listed, because of their great geographic separation; E. deserti is known only from northwestern Africa (Lieftinck 1966) and E. circulatum (with subspecies E. c. continentale Belyshev 1956) from eastern Asia (Tsuda 1991). Although making no taxonomic judgments, Seidenbusch (1997) listed differences between E. boreale and each of the other nominal taxa that correspond to species differences in closely related Enallagma. Belyshev et al. (1976) listed Enallagma belyshevi Haritonov, 1975 from Iturup and Kunashir. In their collections, it was much the most abundant of the two species of the genus, with 103 specimens collected versus six of E. circulatum. Among the 48 males examined for this study, all match the description of E. belyshevi because of the extensive black coloration on the abdominal dorsum and the narrow stripe on the second lateral suture of the thorax. However, the specimens vary greatly in the amount of black on the abdomen. The paired black spots on segment 8, considered characteristic of E. belyshevi by Haritonov (1975), vary continuously from absent to filling the entire segment with black. A minority of the specimens show black stripes on the sides of the abdominal segments, considered characteristic of E. circulatum by Haritonov (1975); however, none shows stripes as pronounced as those in Haritonov's illustration of that species. Specimens with more black on segment 8 78 D. R. Paulson, N. Minakawa, and R. I. Gara were more likely to show black stripes on the sides of the segments. The extensive black coloration of these Kuril specimens is comparable to the geographic variation in North America of E. boreale and E. cyathigerum (Charpentier, 1840), in which northern individuals often exhibit much more extensive black markings (Walker 1953). Seidenbusch (1997) also found no morphological differ ences between E.