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A Study of the Weevil Tribe Celeuthetini of the Solomon Islands (Coleoptera: Curculionidae)

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A Study of the Weevil Tribe Celeuthetini of the Solomon Islands (Coleoptera: Curculionidae) Brigham Young University Science Bulletin, Biological Series Volume 10 Number 3 Article 1 6-1969 A study of the weevil tribe Celeuthetini of the Solomon Islands (Coleoptera: Curculionidae) Vasco M. Tanner Department of Zoology and Entomology, Brigham Young University, Provo, Utah Follow this and additional works at: https://scholarsarchive.byu.edu/byuscib Part of the Anatomy Commons, Botany Commons, Physiology Commons, and the Zoology Commons Recommended Citation Tanner, Vasco M. (1969) "A study of the weevil tribe Celeuthetini of the Solomon Islands (Coleoptera: Curculionidae)," Brigham Young University Science Bulletin, Biological Series: Vol. 10 : No. 3 , Article 1. Available at: https://scholarsarchive.byu.edu/byuscib/vol10/iss3/1 This Article is brought to you for free and open access by the Western North American Naturalist Publications at BYU ScholarsArchive. It has been accepted for inclusion in Brigham Young University Science Bulletin, Biological Series by an authorized editor of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. • r ro V J '''JS. COMP. 200L. L/BRARy SEP 5 ^969 Brigham Young University Harvard Science Bulletin A STUDY OF THE WEEVIL TRIBE CELEUTHETINI OF THE SOLOMON ISLANDS (COLEOPTERA: CURCULIONIDAE) by VASCO M. TANNER BIOLOGICAL SERIES — VOLUME X, NUMBER 3 JUNE, 1969 BRIGHAM YOUNG UNIVERSITY SCIENCE BULLETIN BIOLOGICAL SERIES Editor: Wdlmer W. Tanner, Department of Zoology and Entomology Brigham Young University, Provo, Utah Associate Editor: Stanley L. Welsh, Department of Botany, Brigham Young University, Provo, Utah Members of the Editorial Board: Tipton, Zoology Vernon J. Ferron L. Anderson, Zoology V. Beck, Microbiology J. Joseph R. Murdock, Botany Wilmek W. Tanner, Chairman of the Board Ex officio Members: A. LesterLes: Allen, Dean, College of Biological and Agricultural SciencesSci Ernest L. Olson, Chairman, University Pubhcations The Brigham Young University Science Bulletin, Biological Series, pubHshes acceptable papers, particularly large manuscripts, on all phases of biology. Separate numbers and back volumes can be purchased from University Press, Brigham Young University, Provo, Utah. All remittances should be made payable to Brigham Young University. Orders and materials for Hbrary exchange should be directed to the Division of Gifts and Exchange, Brigham Young University Library, Provo, Utah 84601. Brigham Young University Science Bulletin A STUDY OF THE WEEVIL TRIBE CELEUTHETINI OF THE SOLOMON ISLANDS (COLEOPTERA: CURCULIONIDAE) by VASCO M. TANNER BIOLOGICAL SERIES — VOLUME X, NUMBER 3 JUNE, 1969 GlllADALCANAL I SLAND -'i.^t/Q^^r^ffAh-. ( hrM SnUn It) SAN C ^•:,«5--. "^^i?"" BOUGAINVILLE ISLAND ^^^*'.. I .^TL , t^ "rti.rtjrtttL ', , , Rot Roir c 'J*^ .'5*«o^^ - Island -^^ KolombangiTa ^ N Island 3^ toi%. J >* .U; \ New Georgia NEW GEORGIA Rendovalova Islands-Island, 'i^W' ^ ''i^'" JLiW *'4"-"'f' S GROUP \^"- Fig. 1. Map cf the Solomon Islands. By permission of the United States A-my Map Service TABLE OF CONTENTS Page INTRODUCTION 1 SYSTEMATIC CONSIDERATIONS 2 TAXONOMIC KEYS Key to the Genera of Celeuthetini Found on the Solomon Islands ; 5 Key to the species of Kietana 7 Key to the species of Platyacus 11 Key to the species of Trigonops 21 GENERA AND SPECIES DESCRIPTIONS 46 LITERATURE CITED 46 INDEX LIST OF ILLUSTRATIONS Figure Page 1. Map of the Solomon Islands II 2. Zeugorrhinus granulatus Mshl 2 3. Kietana episomoides Hllr 8 4. Kietana gressitti n. sp 8 5. Celeuthetes paganus GyU 9 6. Atactophijsis cordata Hllr 10 7. Platyacus suhalatus Hllr 13 8. Platyacus laticollis Hllr 14 9. Platyacus kolomhangarae Mshl 14 10. Platyacus malachiticus Hllr 15 11. Platyacus nigrocristatus Hllr 16 12. Platyacus decoratus Fst 17 13. Platyacus wehsteri Fst 18 14. Platyacus leveri M.shl 18 15. Female ventrites of species of Platyacus 19 I. P. laticollis; 2, P. kolomhangarae; 3. P. decoratus; 4. P. minor Mshl. 16. Hypotactus ruralis Fst 19 17. Hypotactus papillatus Fst 20 18. Hypotactus novohritannicus var. suturalis Hllr 20 19. Paratastus carbunculus Hllr 21 20. Trigonops rugosa Guer 24 21. Trigonops planicollis HUr 25 22. Trigonops paravicinii Hllr 26 23. Trigonops minuta n. sp 26 24. Trigonops irrorata Hllr 27 25. Trigonops froggutti Hllr 28 26. Trigonops solomonis Hllr 29 27. Trigonops coerulescens Blanch 30 28. Trigonops marshalli n. sp 30 29. Trigonops exophlhalmus Hllr 31 30. Trigonops becki n. sp 32 31. Trigonops becki 9 genitalia 33 32. Trigonops platessa Hllr 34 33. Trigonops platessa $ genitaha 34 34. Trigonops platessa 5 genitalia and spermatheca 35 35. Trigonops granulosa n. sp 35 36. Trigonops isabellae n. sp 36 37. Trigonops carinitlwrax Hllr 37 38. Trigonops bouguinvillensis n. sp 38 39. Trigonops guadalcanalensis n. sp 39 40. Trigonops hclleri n. .sp 40 41. Trigonops seriatopunctata Hllr 41 42. Trigonops dilaticoUis Gnth 42 43. Trigonops notaticollis Hllr 43 44. Trigonops forticornis Hllr 43 45. Trigonops gressetti n. sp 44 46. Trigonops gloriosa n. sp 45 A STUDY OF THE WEEVIL TRIBE CELEUTHETINI OF THE SOLOMON ISLANDS (COLEOPTERA: CURCULIONIDAE) by Vasco M. Tanner' INTRODUCTION This study is concerned with the genera and Mr. Robert C. Pendleton, who spent twenty- species of the tribe Celeuthetini known to occur two months on the Solomon Islands in 1944-45, in the Solomon Islands. The tribe is confined, published his findings on "The Rain Shadow in the main, to New Guinea and neighboring Effect on the Plant Formations of Guadalcanal" Islands. With the exception of Celeuthetes, the (1949). The following excerpts are from this genera and species of Celeuthetini on which this study. paper is based are endemic to the Solomon Is- Guadalcanal is well within the true tropic lands. On the basis of collections, Celeuthetes, belt and the work of many plant geographers has a wide distribution from Australia to the indicates that a rain forest t^pe of vegetation should be e.vpected. However, this differs Moluccas. island in having the major portion of the North Coast The Solomon Islands consist of eleven large covered with coarse grass whUe a tnie rain islands which form two chains. The northern forest vegetation occurs in the south portion ;md on the moiuitains. row of islands are Buka and Bougainville, just The main mountain ranges on the island south of New Britain, followed by Choiseul, are approximately parallel and occupy a central Santa Isabel, and Malaita. The southern group, position. Comprehensive ground studies were which essentially parallels the northern row, con- made only on the north coastal plain, lxx:aiise sists of Vella Lavella, Kolombangara, New Geor- travel to other portions was exteremeU' diffi- cult. Guadalcixnal is the only island of the gia, Russell, Guadalcanal, and San Cristobal. group having a mountain chain at right angles Bouganville, the largest of the Solomon Is- to the prevailing wind direction. It is character- lands, has an area of 3,900 square miles, while ized by having a rain forest on the south side and grasslands on the north side of the island. Gualacanal, the second largest, is 2,500 square The ecological factors responsible for the grass- miles in area. The main topographical features lands of the island are both climatic and topo- of the islands are the 10,000-foot active volcano. graphic. In the rain shadow insufficient rain Mount Bally, on Bouganville and an 8,000-foot falls during several months to support a forest. peak on Guadalcanal ( map. Fig. 1 ) . The climate This great ecological diversity which pre- is tropical; the average temperature is about 82 vails in the Solomon Islands, no doubt, accounts degrees Fahrenheit. During the rainy season, for the many species of insects found on the from January to March, the temperature and Islands. humidity are high. The weather from April to November is fairly cool. In general the climate, Although knowledge of the Celeuthetini has flora, and fauna of the Solomon Islands are simi- been accumulating since the pioneer contribu- lar to that of Guadalcanal. The topography, di- tions of Guerin-Meneville (1841); Wallace rection of the mountain ranges, and size of the (18.54-1862); Lacordaire (1861); Pasco (1885); islands have influenced the floral patterns, den- Cheveolat (1885); Faust (1897); Heller (1910, sity of the plant growth, and, to some extent, 1934); Gunther (1937); E. G. Zimmerman determined the insect life on each of the islands ( 1942); and J. L. Gressitt ( 1966 a & b); the rich (Gressitt 1961). The following observations insect fauna of the Solomon Islands is still poor- made on the climate and plant life of Guadal- ly known. canal may be applicable to the other islands of Collecting throughout the year on all areas the Solomon group. of the islands will, no doubt, produce many ad- 'Deparlnient of Zoology and Entomology. Brigham Young University. Provo. Utah. Bricham Young University Science Bulletin ditions to the fauna as well as contribute infor- range and high endemicity of several of the mation concerning the economic importance and genera as evidenced by the separation of the 36 life history of the insects. The specimens that species of the old wide-spread genus Trigonops. have come under my observation have been These he considered as confined to the Solomon collected mainlv at a few coastal centers on the Islands area. Solomon Islands. Several species known to occur on the islands The monumental study by Sir Guy Marshall have not been described, since they are repre- (1956) brought order out of a previously dis- sented in collections only by a single specimen. organized classification of the Celeuthetini. It The type material of all new species described represents a critical enlargement of the revisional in this study have been deposited in the collec- work of Faust (1897). Faust had recognized 31 tions from which the specimens came to me by genera as belonging to the tribe but had failed loan. Tvpe specimens are designated and their to discern the generic characters and groupings disposition indicated as a part of each descrip- of the tribe.
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