Species Diversity, 1998, 3, 75-80

Recent Collections of from the

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 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 . 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 (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

AESHNIDAE Aeshna juncea (Linnaeus, 1758). Kunashir 11 (la71), 12 (2c/1 a71); Iturup 19 (2c71 a*, 1 larva). Aeshna nigroflava Martin, 1908. Kunashir 6 (3o*o*, 2S S), 15 (lo71, IS); first Kuril record.

CORDULEGASTRIDAE Anotogastersieboldii (Selys, 1854). Kunashir 7 (lo*), 11 (3o*o*), 14 (lo71, IS).

CORDULIIDAE Cordulia aenea amurensis Selys, 1887. Kunashir 6 (5o*o*), 7 (IS); first Kuril record. arctica (Zetterstedt, 1840). Iturup 17 (lo71), 19 (20*o71). Somatochlora graeserigraeseri Selys, 1887. Kunashir 11 (2o*o*, 1S). As expected, these specimens belong to the hyaline-winged subspecies S. g. graeseri rather than the more southerly S. g. aureola Oguma, 1913. Asahina (1959) also listed this subspecies from the Kurils. On the contrary, Belyshev et al. (1976) recorded S. g. aureola from Kunashir, based on the colored wing bases of their three specimens; more material from this island should be studied. Somatochlora japonica Matsumura, 1911. Kunashir 15 (lo*).

LIBELLULIDAE Libellula quadrimaculata Linnaeus, 1758. Kunashir 6 (6o*o*), 15 (3o*o*, IS). Oddly, the collection examined by Belyshev et al. (1976) contained 23 specimens from Iturup but none from Kunashir. Those authors considered the population to be L. q. quadrimaculata, whereas Asahina (1959) considered it the Japanese subspecies L. q. asahinai Schmidt, 1957. We are unable to resolve this discrepancy, but a pair of specimens examined from Honshu, Japan, differ in no substantive way from the Kuril specimens examined by us. They are identical in the color pattern of the labrum, labium, and rear of the head, those areas that Belyshev et al. (1976) used to differen tiate them. Furthermore, both sets of specimens seem identical to series from Germany and North America, and we consider L. q. asahinai a poorly differentiated subspecies. Orthetrum triangulare melania (Selys, 1883). Kunashir 7 (2o*o*), 13 (2o*o*), 14 (6o*o*). Pantalaflavescens (Fabricius, 1798). Kunashir 6 (lo*, IS); Iturup 19 (IS). Pseudothemiszonata (Burmeister, 1839). Kunashir 13 (IS), 14 (lo*); first Kuril record. The male has much less black at the wing base than seven males from Kuril Islands Odonata 79

Honshu in the senior author's collection, the black patch comprising

Discussion

Only four previous lists of Kuril Odonata have been published, by Okumura (1941, 1942), Asahina (1959), Kuwayama (1967), and Belyshev et al. (1976). Okumura recorded nine species from the archipelago, Asahina added 10 more, and Belyshev et al. (1976) added another three. Of the 17 species reported herein, four are first records from this archipelago, bringing the total to 26 species. All of the species herein reported are known from Hokkaido except Pseudothemis zonata (Ishida et al. 1988), and all except that species are also known from the Russian mainland (Belyshev 1976; Tsuda 1991). Pseudothemis zonata is considered rare even at its previously known northern limits in northern Honshu (Ishida et al. 1988), and thus these Kunashir records represent a significant range extension. Two stream species, Mnais pruinosa and Anotogaster sieboldii, were taken only in the vicinity of hot springs on Kunashir, and one of the localities for Pseudothemis zonata was also a geothermal spring. It will be of interest to see if these species occur anywhere away from hot springs at this northerly locality. The following species, previously recorded from Kunashir (Asahina 1959; Belyshev et al. 1976), were not collected during our surveys: Lestes dryas Kirby, 1890, Aeshna crenata Hagen, 1856, Somatochlora uchidai Forster, 1909, S. viridiaenea viridiaenea (Uhler, 1858), Leucorrhinia dubia (Van der Linden, 1825), Sympetrum flaveolum (Linnaeus, 1758), S. infuscatum (Selys, 1883), and S. striolatum kurilis Belyshev, 1976. The failure to find these eight species and our collection of four previously unreported species indicates that the Odonata fauna of Kunashir is still imperfectly known. Field work began as early as 31 July and ended as late as 2 September. It is unlikely that any species in the southern islands has a flight season sufficiently late that it could not have been encountered in the adult state, but it is possible that a species with a short spring flight season might have been missed. Considerably more field work is warranted.

Acknowledgements

The work described here was supported in part by the International Program 80 D. R. Paulson, N. Minakawa, and R. I. Gara

Division and the Biological Sciences Directorate (Biotic Surveys and Inventories Program) of the U.S. National Science Foundation, Grant Number DEB-9400821, T. W. Pietsch, Principal Investigator. We thank P. B. H. Oberg for assistance in the field and V. A. Teslenko and T. I. Arefina for translating the important Russian papers.

References

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