Key and Atlas to the Genus <I>Trichocera</I> MEIGEN in Europe
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Acta zoologica cracoviensia, 64(1) 2021 e-ISSN 2300-0163 Kraków, May, 2021 https://doi.org/10.3409/azc.64.01 http://www.isez.pan.krakow.pl/en/acta-zoologica.html Zoobank Account: urn:lsid:zoobank.org:pub:9CC4F52B-9F46-43F5-8596-15019C70018E Key and atlas to the genus Trichocera MEIGEN in Europe (Diptera, Trichoceridae) Ewa KRZEMIÑSKA Received: 10 April 2021. Accepted: 20 May 2021. Available online: 31 May 2021. Issue online: 31 May 2021. Original article KRZEMIÑSKA E. 2021. Key and atlas to the genus Trichocera MEIGEN in Europe (Diptera, Trichoceridae). Acta zool. cracov., 64(1): 1-157. Abstract. The key presents all 59 species of the genus Trichocera MEIGEN which occur in Europe. Four subgenera are represented: Trichocera MEIGEN 1803 (five species), Metatrichocera DAHL 1967 (seven species), Saltrichocera KRZEMIÑSKA 2002 (35 species), and Staryia KRZEMIÑSKA &GORZKA 2016 (13 species). The type material of two species, one from North America and one from Asia, are described (Trichocera columbiana ALEXANDER, 1927 and T. arctica LUNDSTRÖM, 1915), whose identities cause some problems and whose presence in the northern regions of Europe is possible. Two new species are described, Trichocera (Saltrichocera) longa, n. sp., and T.(Staryia) oulankae,n.sp. Trichocera versicolor is resurrected from synonymy; T. limpidipennis is synonymized with T. regelationis. There are separate keys to males and females; species are illustrated with camera pictures of diagnostic features: genitalia, antennae, and male tarsal claws, and additionally, wings and thoraces when only one sex is known, to enable further search. The state of knowledge of the genus in Europe and in the world is discussed. Key words: Saltrichocera, Metatrichocera, Staryia, new species, Trichocera columbiana, Trichocera arctica. *Ewa KRZEMIÑSKA, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, ul. S³awkowska 17; 31-016 Kraków, Poland. E-mail: [email protected] A female of Trichocera annulata drinking water (photo: A. PALACZYK). Ó Institute of Systematics and Evolution of Animals, PAS, Kraków, 2021 Open Access article distributed under the terms of the Creative Commons Attribution License (CC-BY) OPEN Ð ACCESS http://creativecommons.org/licences/by/4.0 2 E. KRZEMIÑSKA CONTENTS 28. longa, n. sp...................73 29. maculipennis MEIGEN, 1818 .........75 I. INTRODUCTION ..................2 30. mendli DAHL, 1976..............80 II. MATERIAL AND METHODS ..........4 31. michali KRZEMIÑSKA, 1999 .........82 III. KEY TO MALES.................7 32. montium STARÝ, 2001 ............84 IV. KEY TO FEMALES ..............10 33. mutica DAHL, 1966..............86 V. TAXONOMIC PART ..............12 34. nordica KRZEMIÑSKA &GORZKA, 2014 ..88 Genus Trichocera MEIGEN, 1803 ..........12 35. obtusa STARÝ &MARTINOVSKÝ, 1996...90 Subgenus Trichocera MEIGEN, 1803........13 36. pappi KRZEMIÑSKA, 2003 ..........92 1. hiemalis (DE GEER), 1776 ...........13 37. parva MEIGEN, 1804 .............94 2. inexplorata DAHL, 1967 ............16 38. pubescens STARÝ &MARTINOVSKÝ, 1996 ..96 3. major EDWARDS, 1921 ............18 39. recondita STARÝ, 2000............98 4. marocana DRIAUACH,KRZEMIÑSKA & 40. regelationis (LINNAEUS), 1758 .......100 BELQAT, 2015 .................20 41. rufescens EDWARDS, 1921 .........104 5. sibirica EDWARDS, 1920 ...........21 42. rufulenta EDWARDS, 1938 .........106 Subgenus Metatrichocera DAHL, 1967 ......24 43. saltator (HARRIS), 1776...........108 6. forcipula NIELSEN, 1920 ...........24 44. sardiniensis PETRAÐIÛNAS, 2009 ......112 7. gigantea DAHL, 1967 .............26 45. simonyi MIK, 1886 .............114 8. kotejai KRZEMIÑSKA, 1992 ..........29 46. sparsa STARÝ &MARTINOVSKÝ, 1996 ..116 9. lutea BECHER, 1886 ..............31 47. thaleri STARÝ, 2000.............118 10. mackenzie DAHL, 1967 ............34 48. versicolor LOEW, 1871 ...........120 TARÝ ODENAS 11. ticina S &P , 1995 .......37 Subgenus Staryia KRZEMIÑSKA &GORZKA, 2016. 122 OLCSÁR 12. unica K , 2018 ............38 49. altipons STARÝ, 1998 ............122 Subgenus Saltrichocera KRZEMIÑSKA, 2002 ...40 50. basidens STARÝ, 1998 ...........125 13. alpina STARÝ, 2000 .............40 51. christinae KRZEMIÑSKA &GORZKA, 2016 . 127 14. andorrensis KRZEMIÑSKA, 2000.......42 52. dufouri KRZEMIÑSKA, 2020 ........129 15. annulata MEIGEN, 1818 ...........44 53. geigeri STARÝ & KRZEMIÑSKA, 2000 . 132 16. antennata STARÝ, 1999 ...........46 54. muelleri KRZEMIÑSKA, 2020 ........134 17. arctica LUNDSTRÖM, 1915 ..........48 55. oulankae, n. sp. ...............136 18. bilobata STARÝ, 1999 ............52 56. polanensis STARÝ, 2002 ..........138 19. borealis LACKSCHEWITZ, 1934 .......54 57. rannanenae KRZEMIÑSKA &GORZKA, 2016 ..140 20. brevis KRZEMIÑSKA, 2002 ..........56 58. rectistylus STARÝ, 1998...........142 21. calva STARÝ, 1999 ..............58 59. transversa STARÝ, 1998 ..........144 22. candida DAHL, 1976 .............60 60. villosa STARÝ, 2009.............145 23. carpathica STARÝ &MARTINOVSKÝ, 1996 . 62 61. viramoi KRZEMIÑSKA &GORZKA, 2016 ..148 24. columbiana ALEXANDER, 1927 .......64 VI. DISCUSSION ..................150 25. dahlae MENDL, 1971 .............66 VII. UPDATED LIST OF SPECIES 26. hirta STARÝ &MARTINOVSKÝ, 1996 ....68 IN THE GENUS TRICHOCERA ......151 27. implicata DAHL, 1976 ............70 VIII. REFERENCES ................154 I. INTRODUCTION The family Trichoceridae RONDANI, 1841, comprises c. 160 recent species included in two subfamilies: Tri- chocerinae RONDANI, 1841, and Paracladurinae The nematoceran family Trichoceridae is placed either KRZEMIÑSKA, 1992. Each subfamily has three genera. among the infraorder Tipulomorpha as a superfamily, The Trichocerinae comprise Trichocera MEIGEN, Trichoceroidea (e.g., HENNIG 1973; WOOTTON & 1803, Cladoneura SCUDDER, 1894 (former Diazosma ENNOS 1989; SHCHERBAKOV et al. 1995; STARÝ 1992, BERGROTH, 1913), and Nothotrichocera ALEXANDER, 2008), or is separated into its own infraorder, Tri- 1926; the Paracladurinae, Paracladura BRUNETTI, 1911, choceromorpha (KRZEMIÑSKI 1992; KRZEMIÑSKI & Asdura KRZEMIÑSKA, 2006, and Zedura KRZEMIÑSKA, KRZEMIÑSKA 2003). Both positions acknowledge the 2005. The taxonomy, morphology, and history of the close relationship of Trichoceridae to the Limoniidae, family was recently presented in a monograph on fossil which are the oldest lineage of Tipulomorpha. Trichoceridae (KRZEMIÑSKA et al. 2009). The family Key to Trichocera in Europe 3 belongs to oldest among the Diptera, having been lasts only few hours. Freshly emerged adults are easily represented already in the Lower Jurassic (Toarcian; recognized by their soft, whitish bodies and character- KRZEMIÑSKA &LUKASHEVICH 2017). Both subfamilies, istically upturned abdomens full of fat. This stage is along with the extinct Kovaleviinae KRZEMIÑSKA, short; chitinized segments darken and harden, and fat KRZEMIÑSKI &DAHL, 2009, were represented in the is promptly consumed. It is supposed that adults do Upper Jurassic. A second extinct subfamily, the bi- not feed, as their alimentary ducts are empty (but they zarre Ewauristidae SHCHERBAKOV &AZAR, 2019, is do at least drink; see figure on the front cover). Ac- known only from early Cretaceous Lebanese amber. cording to my observations, the alimentary ducts of Today the family is relict when compared to its diver- some adults do contain some dark organic matter. sity in the Mesozoic (KRZEMIÑSKA et al. 2009). Males emerge c. two weeks earlier than females. The genus Trichocera, known since the Cretaceous, Adult males in some species form characteristic is scarcely recorded from Eocene Baltic amber and swarms; these are approached by females, and a mat- various Cenozoic sediments in Europe, Asia, and North ing pair lands on soil for copulation. A fertilized female America (records summarized in KRZEMIÑSKA &al. lays eggs into some compost-like substrate, such as 2009). Trichocera, with its 117 recent species (Table 1 dead leaves, rotten vegetables, or detritus-rich soil. under Discussion), is the largest genus among the Adults live probably not longer than two months. The family and occupies mainly subarctic to temperate duration of larval development seems to be an enigma. zones in the Holarctic; only three species also have Observations of freshly emerged adults in the midst of isolated populations in the southern hemisphere, most winter in Norway (HÅGVAR &KRZEMIÑSKA 2007) probably being introduced by man (e.g., DAHL 1970b; suggest that the larvae are able to develop all four of VOLONTERIO et al. 2013). All species of Trichocera, their stages in 2-3 months (under snow), from the time as well as almost all other members of the family (ex- of the main autumn flight of adults. Alternatively, the cept Cladoneura), are cool-adapted and adults appear larvae may have developed since the previous from autumn to spring; the duration of their flight pe- autumn-winter, i.e., in the course of one year. Possi- riod varies between the species. bly, the duration of larval development is modified by temperature and weather conditions in a particular year; The earliest descriptions of trichocerids were pub- such plasticity is characteristic to Arctic and Antarctic lished in the XVIII century and concern the three most insects (e.g., DANKS et al. 1994). In any case, the pu- common European species (Trichocera regelationis pation, this most vulnerable stage for holometabo- (LINNAEUS) 1757; T. hiemalis (DE GEER), 1776; lans, may occur also in winter, closely followed by T. saltator (HARRIS), 1776. During the XIX century, females laying