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Herrmann, M., Engels, W., Engels, W.: Optimierte Futtermischungen zur Laboraufzucht von Bienenlarven (Apis mellifera). Entomol. Geral. 30: in press Rabeling, C., Verhaagh, M., Engels, W.: Comperative study of nest architecture and colonie structure in the fungus-growing ants, Mycocepurus goeldi anad M. smithii. J. insect Sci. 7: article 40 (2007) Dost, C.K., Saraiva, J., Zentgraf, U., Monesi, N., Engels, W., Albuquerque, S.: Is nitric oxide involved in the tolerance of Calomys callosus as a reservoir host towards Trypanosoma cruzi infection? J. Infection 52: 49-55 (2006) Klingenberg, C., Brandão, C.R.F., Engels, W.: Primitive nest architecture and small mongynous colonies in balsal Attini inhabiting sandy beaches of southern Brazil. Stud. Neotrop. Fauna Environm. 42: 121-126 (2006) Kanbar, G., Engels, W.: Communal use of integumental wounds in honey bee (Apis mellifera) Gen. Mol. Res. 4: 465-472 (2005) Solé, M., Beckmann, O., Pelz, B., Kwet, A., Engels, W.: Stomach-flushing for diet analysis in anurans: an improvided protocol evaluated in a case study in Araucaria forests, southern Brazil. Brazil. Stud. Neotrop. Fauna Environm. 40: 23-28 (2005) Thiele, R.: Phenology and nest site preferences of wood-nesting bees in a Neotropical lowland rain forest. Brazil. Brazil. Stud. Neotrop. Fauna Environm. (2005) Amdam, G.V., Hartfelder, K., Norberg, K., Hagen, A., Omholt, S.: Altered physiology in worker bees infested with Varroa destructor as a factor in colony loss during overwintering. Apidologie. Im Druck (2004) Both, C., Kwet, A., Solé, M.: The tadpole of Physalaemus lisei Braun & Braun 1977 from southern Brazil (Anura: Leptodactylidae).Alytes. In Vorbereitung (2004) Both, C., Solé, M., Kwet, A.: The tadpole of Hyla leptolineata Braun & Braun 1977 belonging to the Hyla polytaenia group (Anura, Hylidae). J. Herpetol. In Vorbereitung (2004) Carvalho, G., Solé, M.: Descrição do girino de Leptodactylus plaumanni Ahl 1936 (Anura, Leptodactylidae) do centro de pesquisa e conservação da natureza Pró-Mata, Rio Grande do Sul, Brasil. Cuadernos de Biologia UNISC. In Vorbereitung (2004) Cappellari, S.-C., Harter-Marques, B., Aumeier, P., Engels, W.: Male orchid bees collect oil from flowers of Mecardonia are they also pollinating? A case study on the Araucaria plateau in Rio Grande do Sul. Proc. 8. IBRA Intern. Conf. Tropical Bees, VI Encontro sobre abelhas: 624 (2004) De Oliveira, R. B., Pontes, G. M. F., Solé, M., Di-Bernardo, M., Martins, M. B.: Lystrophis dorbignyi (Nariguda) and Helicops infrataeniatus (Cobra-D´Água). Predation. Herpetological Review 35: 70-71 (2004) Di-Bernardo, M., Baptista de Oliveira, R., Funk Pontes, G.M., Melchiors, J., Solé, M., Kwet, A.:Anfíbios anuros da região de extração e processamento de carvão de Candiota, RS, Brasil. Estudos Ambientais em Candiota. Carvão e seus Impactos. Cadernos de Planejamento e Gestão Ambiental N° 4, Porto Alegre, RS: 163-175 (2004) Dost, C.K., Saraiva, J., Monesi, N., Zentgraf, U., Engels, W., Albuquerque, S.: Six Trypanosoma cruzi strains characterized by specific gene expression patterns. Parasitol. Res. 97: 134-140 (2004) Engels, W.: What bee larvae might tell their nurses? Proc. 8. IBRA Intern. Conf. Tropical Bees, VI Encontro sobre abelhas: 18-26 (2004) Guidugli, K.R., Hepperle, C., Hartfelder, H.: A member of the short-chain dehydrogenase/reductase (SDR) superfamily is a target of the ecdysone response in honey bee (Apis mellifera L.) caste development. Apidologie 35: 37-48 (2004) Harter-Marques, B., Truylho, B.: Bee pollination of Baccharis shrubs in regenerating Araucaria forests of Rio Grande do Sul, Brazil. In Vorbereitung für Ecotropica (2004) Harter-Marques, B., Wittmann, D., Engels, W.: Biodiversity of bees and melittophilous plants in a South Brazilian Araucaria forest and surrounding secondary vegetation. In Vorbereitung für Stud. Neotrop. Fauna Environm. (2004) Herrmann, M., Engels, W.: In vitro-Aufzucht von Larven der Honigbiene (Apis mellifera) mit semiartifiziellen Diäten und einem Fütterungs-Automaten. Entomol. General. Im Druck (2004) Herrmann, M., Kanbar, G., Engels, W.: Survival of honey bee (Apis mellifera) pupae after trypan blue staining of wounds caused by Varroa destructor mites or artificial perforation. Apidologie 35. Im Druck (2004) Herrmann, M., Trenczek, T., Fahrenhorst, H., Engels, W.: In which charcters differ diploid and haploid drones in the honey bee (Apis mellifera)? Genet. Mol. Res. Eingereicht (2004) Ketterl, J., Verhaagh, M., Dietz, B.H.: Eurhopalothrix depressa sp. n. (Hymenoptera: Formicidae) from Southern Brazil with a key to the Neotropical taxa of the genus. Stud. Neotrop. Fauna Environm. 39: 45-48 (2004) Kanbar, G., Engels, W.: Visualisation by vital staining with trypan blue of wounds punctured by Varroa destructor mites in pupae of the hoeny bee (Apis mellifera). Apidologie 35: 25-29 (2004) Kanbar, G., Engels, W.: Number and position of wounds on honey bee (Apis mellifera) pupae infested with a single Varroa mite. Eur J Entomol 101.: 323-326 (2004) Kanbar, G., Engels, W., Nicholson, G.J., Hertle, R., Winkelmann, G.: Tyramine functions as a toxin in honey bee larvae during Varroa-transmitted infection by Melissococcus pluton. FEMS Microbiology Letters 234: 149-154 (2004) Ketterl, J., Verhaagh, M., Brandão, C.R.F., Engels, W.: Ant biodiversity in the Araucaria forest reserve Pró-Mata, Rio Grande do Sul, Brazil. Iheringia. In Vorbereitung (2004) Klingenberg, C., Forti, L., Engels, W.: Ameisen und Araukarien: Biodiversität in südbrasilianischen Plantagen und Biotests zum Eintrag von Nadeln unterschiedlich alter Bäume durch Blattschneiderameisen. Pró-Araucaria-Online. In Vorbereitung (2004) Kwet, A.: Frösche im brasilianischen Araukarienwald. Biol. Unserer Zeit 34/3: 107-178 (2004) Kwet, A., Solé, M.: Taxonomic status of Hylodes henselii Peters, 1870 from southern Brazil, and description of acoustic variation in Eleutherodactylus guentheri (Anura: Leptodactylidae). J. Herpetol. Eingereicht (2004) Mecke, R. : New species of Pachycotes Sharp and Xylechinus Chapuis (Coleoptera, Curculionidae, Scolytinae, Tomicini) from New Caledonian Araucaria spp. (Coniferales: Araucariaceae). New Zealand J. Zool. 31. Im Druck (2004) Mecke, R.: A new Brazilian bark beetle, Xylechinosomus lucianae sp. n. (Coleoptera, Curculionidae, Scolytinae, Tomicini), from Araucaria angustifolia (Conifera, Araucariaceae). Deutsche Entomol. Z. 51: 217-220 (2004) Mecke, R., Galileo, M.H.M: A review of the weevil fauna (Coleoptera, Curculionoidea) of Araucaria angustifolia (Bert.) O. Kuntze (Araucariaceae) in South Brazil. Revista Brasileira de Zoologia 21: 505-513 (2004) Mecke, R., Mille, C., Engels, W.: Araucaria beetles worldwide: evolution and host adaptations of a multi-genus phytophagous guild of disjunct Gondwana-derived biogeographic occurrence. www.pro-araucaria-online.com, Vol. 1: 2005, 1 - 18 Melchiors, J., Di-Bernardo, M., Pontes, G. M. F., De Oliveira, R. B., Solé, M., Kwet, A.: Reprodução de Pseudis minutus Günther, 1858 (Anura: Hylidae: Pseudinae) no sul do Brasil. Phyllomedusa. Eingereicht (2004) Miranda, T., Ebner, M., Solé, M., Kwet, A.: Método fotográfico para reconhecimento individual de Pseudis cardosoi Kwet, 2000 (Anura, Pseudidae). Biociências. Eingereicht (2004) Santomauro, G., Oldham, N.J., Boland, W., Engels, W.: Cannibalism of diploid drone larvae in the honey bee (Apis mellifera) is released by odd pattern of cuticular substances. Journal of Apicultural Research 43: 69-74 (2004) Schromm, S., Mello, R.: Produção, estoque e decomposição da serrapilheira nas florestas de Pró-Mata. Iheringia. In Vorbereitung (2004) Solé, M., Pelz, B., Kwet, A.: Hyla faber (Smith frog). Diet. Herpetological Review 35:159 (2004) Solé, M., Pelz, B., Di-Bernardo, M., Kwet, A.: Do male tree frogs feed during the breeding season? A comparison of five hylid species of Rio Grande do Sul, southern Brazil. Revista Española de Herpetologia. In Vorbereitung (2004) Zillikens, A., Steiner, J.: Nest architecture, life cycle and cleptoparasite of the Neotropical leaf-cutting bee Megachile (Chrysoarus) pseudanthidioides Moure (Hymenoptera; Megachilidae). J. Kansas Entomol. Soc. 77: 193-202 (2004) Colonello, N.A., Hartfelder, K.: Protein content and pattern during mucus gland maturation and its ecdysteroid control in honey bee drones. Apidologie 34: 257-267 (2003) Duay, P., De Jong, D., Engels, W.: Weight loss in drone pupae (Apis mellifera) multiply infested by Varroa destructor mites. Apidologie 34: 61-65 (2003) Engels, W.: Araukarienwald - Forschungskooperation in der Mata Atlântica von Rio Grande do Sul. In: Kohlhepp, G. (Hrsg.) Brasilien - Entwicklungsland oder tropische Großmacht des 21. Jahrhunderts? 239-262 (2003) Faria M.J.S., Simões, Z.L.P., Lunardi, L.O., Hartfelder, K.: Apoptosis process in mouse Leydig cells during postnatal development. Micrsoscopy and Microanalysis 9, 68-73 (2003) Garrido, C., Rosenkranz, P., Paxton, R.J., Gonçalves, L.S.: Temporal changes in Varroa destructor fertility and haplotype in Brazil. Apidologie 34: 535-542 Harter-Marques, B., Engels, W.: A produção de sementes de Mimosa scabrella Bentham (Mimosaceae) no Planalto das Araucárias do Rio Grande do Sul, Brasil, depende da polinização por abelhas sem ferrão do gênero Plebeia. Biociências 11: 9-16 (2003) Harter-Marques, B., Truylio, B.: Trigonopedia Moure (Hymenoptera, Apoidea, Tapinotaspidini): primeiro registro no Rio Grande do Sul e descrição de uma espécie nova. Apoidea Neotropica: 47-50 (2003) Kanbar, G., Engels, W.: Ultrastructure and bacterial infection of wounds in honey bee (Apis mellifera) pupae punctured by Varroa mites. Parasitol Res 90: 349-354 (2003) Ketterl, J., Verhaagh, M., Bihn, J.H., Brandão, C.R.F., Engels, W.: Spectrum of ants associated with Araucaria angustifolia trees and their relations to hemipteran trophobionts. Stud Neotrop Fauna Environm 38: 199-206 (2003) Liesebach, M., Mecke, R.: Die Laufkäferfauna einer Kurzumtriebsplantage, eines Gerstenackers und eines Fichtenwaldes im Vergleich. Die Holzzucht 54: 11-15.(2003) Mecke, R., Galileo, M.H.M., Engels, W.: The insects associated with Araucaria angustifolia (Bert.) O. Kuntze in South Brazil. Proceedings of the IDS International Araucariaceae Symposium, Auckland, New Zealand. Im Druck (2003) Paxton, R.J., Bego, L.R., Shah, M.M., Mateus, S.: Low mating frequency of queens in the stingless bee Scaptotrigona postica and worker materny of males. Behav. Ecol. Sociobiol .53: 174-181 (2003) Paxton, R.J., Arévalo, E., Field, J.: Microsatellite loci for Lasioglossum malachurum and other sweat bees (Hymenoptera, Halictidae). Molec. Ecol. Notes 3: 82-84 (2003) Pinto, L.Z., Laure, M.A.F.B., Bitondi, M.M.G., Hartfelder, K., Simoes, Z.L.P.: Ventral nerve cord remodeling in a stingless bee (Melipona quadrifasciata anthidioides, Hymenoptera, Apidae) depends on ecdysteroid fluctuation and programmed cell death. Int. J. Dev. Biol. 47 (2003) Thiele, R.: A review of central America Centris (Heterocentris) and evidence for male dimorphism in C. labrosa (Hymenoptera, Apidae). Deutsche Entomol. Z. 50: 237-242 (2003) Aumeier, P., Rosenkranz, P., Francke, W.: Cuticular volatiles, attractivity of worker larvae and invasion of brood cells by Varroa mites. A comparison of africanized and european honey bees. Chemoecology 12: 65-75 (2002) Aumeier, P., Boecking, O., Wittmann, D.: Einfluss von Völkerführung, Volksentwicklung und Varroa-Befall auf das Auftreten der Varroatose. Apidologie 33: 485-486 (2002) Ayasse, M., Paxton, R. J.: Brood protection in social insects. In: Chemoecology of insect eggs and egg deposition (Hrsg.: Hilker, M., Meiners, T.): 117-148 (2002) Basso, Jr., L .R., Vasconcelos, C., Fontes, A. M., Hartfelder, K., Silva Jr. A., Coelho, P. S .R., Monesi, N. Paçó-Larson, M. L.: The induction of DNA puff BhC4-1 is a late response to the increase in 20-hydroxyecdysone titers in last instar dipteran larvae. Mech. Dev. 110: 15-26 (2002) Boecking, O., Aumeier, P., Ritter, W., Wittmann, D.,: Varroatose-Krankheitskomplex: gibt es ein Wechselspiel? Apidologie 33: 486-487 (2002) Boer Nascente, D., Holanda Neto, J. P., Freitas, B. M., Paxton, R. J.: Verwandtschaftsgrad innerhalb und zwischen Völkern einer im NO Brasiliens heimischen Population der Stachellosen Biene Scaptotrigona bipunctata. Apidologie 33: 516-517 (2002) Cappellari, S. C., Harter, B., Zillikens, A., Steiner, J., Engels, W.: Vergleich der Euglossinen-Biodiversität in Araukarien- und Küstenwäldern Südbrasiliens. Apidologie 33: 517-518 (2002) Di-Bernardo, M., Kwet, A.: Mineração de carvão e seus efeitos sobre anfíbios. In: E.C. Teixeira, H. Fiedler, J.C. Rocha, M. Cheriaf & M. Pires (eds.). Impacto ambiental da e da utilização do carvão mineral no Brasil. Fepam, Porto Alegre: 413-422 (2002) Dost, C. K., Albuquerque, S., Hemleben, V., Engels, W., Prado, Jr. J. C.: Molecular genetic characterization of different Trypanosoma cruzi strains and comparison of their development in Mus musculus and Calomys callosus. Parasitol. Res. 88: 609-616 (2002) Duay, P.: Relation between the level of preimaginal infestation by the broodmite Varroa destructor and adult life expectancy in drone honeybees (Hymenoptera: Apidae: Apis mellifera). Entomologia Generalis 26: 213-218 (2002) Duay, P., de Jong, D., Engels, W.,: Weight loss in drone pupae (Apis mellifera) multiply infested by Varroa destructor mites. Apidologie 34: 61-65 (2002) Duay, P., de Jong, D., Engels, W.,: Decreased flight performance and sperm production in drones of the honey bee (Apis mellifera) slightly infested by Varroa destructor mites during pupal development. Genetics and Molecular Research 1: 227-232 (2002) Duay, P., Engels, W.: Milben machen Männer müde. Windkanal-Versuche mit Varroa-parasitierten Drohnen. Apidologie 33: 488-489 (2002) Engels, W.: Biodiversität / Forschungsprojekt Araukarienwald in Südbrasilien. biologenheute 462 (4): 24-26 (2002) Freitas, B. M., Paxton, R. J., Holanda-Neto, J. P.: Identifying pollinators among the array of flower visitors, and the case of inadequate cashew pollination in NE Brazil. In: Pollinating Bees. The conservation link between agriculture and nature (Hrsg.: Kevan, P.G., Imperatriz-Fonseca, V.L., Frankie, G.W., O'Toole, C., Jones, R., Vergara, C.H.): 229-244. São Paulo (2002) Harter, B., Leistikow, C., Wilms, W., Truylio, B., Engels, W.: Bees collecting pollen from flowers with poricidal anthers in a south Brazilian Araucaria forest: a community study. J Apicult Res 40: 9-16 (2002) Hartfelder, K., Bitondi, M.M.G., Santana, W.C., Simões, Z.L.P: Ecdysteroid titer and reproduction in queens and workers of the honey bee and of a stingless bee: loss of ecdysteroid function at increasing levels of sociality? Insect Biochem. Molec. Biol. 32: 211-216 (2002) Holanda Neto, J.P., Freitas, B.M., Paxton, R.J.: Braucht Cashew (Anacardium occidentale) Fremdbestäubung? Versuche am natürlichen Standort in Nordost-Brasilien. Apidologie 33: 468-469 (2002) Kanbar, G., Engels, W., Winkelmann, G.: Übertragen Varroa-Milben auch Faulbrut (Melissococcus pluton)? Apidologie 33: 487-488 (2002) Kohlmann, C., Pietsch, C., Blochtein, B., Paxton, R.J.: Lassen sich südbrasilianische Honigbienen molekulargenetisch charakterisieren? Apidologie 33: 510-511 (2002) Kwet, A.: Südbrasilianische Laubfrösche der Gattung Scinax mit Bemerkungen zum Geschlecht des Gattungsnamens und zum taxonomischen Status von Hyla granulata PETERS, 1871. Salamandra, Rheinbach 37: 211-238 (2001/02) Kwet, A., Engels, E., Engels, W.: Überwinterung von Grasfroschlarven, Rana temporaria Linnaeus 1758, in einem Brunnenstein. Elaphe 10: 46-48 (2002) Kwet, A., Schlüter, A.: Frösche und Co. Froschlurche - Leben zwischen Land und Wasser. Stuttgarter Beiträge zur Naturkunde 51, Serie C: 1-102 (2002) Kwet, A., Solé, M., Miranda, T., Melchiors, J., Daniel, E. N., Maneyro, R.,: First record of Hyla albopunctata Spix, 1824 (Anura: Hylidae) in Uruguay, with comments on the advertisement call. Bol. Asoc. Herpetol. Esp. 13: 15-19 (2002) Kwet, A., Buob, R., Schlüter, A.: Bemerkenswertes Höchstalter für den Korallenfingerlaubfrosch, Litoria caerulea (White, 1790): 24 Jahre im Terrarium. - Salamandra 38: 109-111 (2002) Kwet, A., Solé, M.: Elachistocleis erythrogaster (Redbellied Oval Frog) . Defensive behavior. - Herpetological Review. 33: 46 (2002) Kwet, A.: Physalaemus biligonigerus and Physalaemus gracilis. Reproductive behavior - Herpetological Review 33(1): 47 (2002) Kwet. A. & Angulo, A.: A new species of Adenomera (Anura, Leptodactylidae) from the Araucaria forest of Rio Grande do Sul (Brazil), with comments on the systematic status of southern populations of the genus. Alytes, 20 (1-2): 28-43 (2002) Kwet, A. & M. Solé: Elachistocleis erythrogaster. Defensive behavior. - Herpetological Review. 33(1): 46 (2002) Mecke, R.: Insetos do Pinheiro Brasileiro - Insekten der brasilianischen Araukarie - Insects of the Brazilian Pine. Attempto Service GmbH, Universität Tübingen, 79 Seiten (2002) Mecke, R. & Galileo, M.H.M.: Insekten an Araucaria angustifolia Grundlagen für einen Integrierten Waldschutz. AFZ Der Wald, 22: 1171-1172 (2002) Palmer, K.A., Oldroyd, B.P., Quezada-Euán, J.J.G., Paxton, R.J. May-Itza, W.J.: Paternity frequency and maternity of males in some stingless bee species. Molecular Ecology 11: 2107-2113 (2002) Paxton, R.J., Ayasse, M., Field, J. Soro, A.: Complex sociogenetic organization and reproductive skew in a primitively eusocial sweat bee, Lasioglossum malachurum, as revealed by microsatellites. Molecular Ecology 11, 2405-2416 (2002) Paxton, R.J.: Nestzyklus und Soziogenetische Struktur der heimischen Furchenbiene Lasioglossum malachurum. Apidologie 33: 518-519 (2002) Paxton, R.J.: Kaleidoskop sozialer Lebensweisen bei Hymenopteren. 5. Hymenopterologen-Tagung, Stuttgart, S. 5-6 (2002) Santomauro, G., Engels, W.: Sexing of newly hatched live larvae of the honey bee, Apis mellifera, allows the recognition of diploid drones. Apidologie 33: 283-288 (2002) Solé, M., Ketterl, J., Di-Bernardo, M. & A. Kwet: Ants and termites are the diet of the microhylid Elachistocleis ovalis (Schneider, 1799) in Rio Grande do Sul, Brazil Herpetological Bulletin 79: 14-17 (2002) Truylio, B., Harter-Marques, B., Engels, W.: Bilogia floral e polinização de Sisyrinchium micranthum Cavanillis 1788 (Iridaceae) na região do Planalto das Araucárias do Rio Grande do Sul, Brasil. Biociências 10: 11-24 (2002) Aumeier, P.: Bioassay for grooming effectiveness towards Varroa destructor mites in Africanized and Carniolan honey bees. Apidologie 32: 81 - 90 (2001) Aumeier, P., Rosenkranz, P.: Scent or movement of Varroa destructor mites does not elicit hygienic behaviour by Africanized and Carniolan honey bees. Apidologie 32: 253 - 263 (2001) Ayasse, M., Paxton, R. J., Tengö, J.: Mating behavior and chemical communication in the order Hymenoptera. Annu. Rev. Entomol. 46: 31-78 (2001) Garcia, P.C.A., Caramaschi, U. & A. Kwet (2001): Sobre o status taxonômico de Hyla cochranae Mertens e recaracterização de Aplastodiscus A. Lutz (Anura, Hylidae). - Revista Brasileira de Zoologia, Curitiba, 18(4): 1197-1218. Garrido, C., Paxton, R.J., Rosenkranz, P.: Varroa-Reproduktion: Wirtsfaktoren oder Eigenschaften des Parasiten? Apidologie 32: 481 - 482 (2001) Kwet, A., Di-Bernardo, Marcos, Garcia, P.C.A.: The Taxonomic Status of Leptodactylus geminus Barrio, 1973. Journal of Herpetology 35: 56-62 (2001) Kwet, A., Faivovich, J.: Proceratophyris bigibbosa Species Group (Anura: Leptodactylidae), with Description of a New Species. Copeia 2001(1): 203-215 Kwet, A. (2001): Südbrasilianische Laubfrösche der Gattung Scinax mit Bemerkungen zum Geschlecht des Gattungsnamen und zum taxonomischen Status von Hyla granulata Peters, 1871. - Salamandra 37(4): 211-238. Kwet, A., Miranda, T. (2001): Zur Biologie und Taxonomie der Schwarzkröte Melanophryniscus atroluteus (Miranda-Ribeiro, 1925). - Herpetofauna 23(134): 19-27. Kwet, A., Miranda, T. (2001): Hyla prasina. Geographic distribution. - Herpetological Review 32(4): 271. Mecke, R., Galileo, M.H.M., Engels, W.: New records of insects associated with Araucaria trees: Phytophagous coleopterans and hymenopterans and their natural enemies. Stud. Neotrop. Fauna & Environm. 36: 113-124 (2001) Mihalko, Z., Zillikens, A., Steiner, J., Hering de Queiroz, M.: Unterschiedliche Trachtnutzung durch Afrikanisierte Honigbienen und Stachellose Bienen im Atlantischen Küstenregenwald Südbrasiliens. Apidologie 32: 473 - 474 (2001) Paxton, R. J., Tengö, J.: Double duped males: the sweet and sour of the orchid´s bouquet. Trends Ecol. Evol. 16: 167-169 (2001) Paxton, R.J., Thorén, P.A., Estoups, A., Tengö, J.: Queen-worker conflict over male production and the sex ratio in a facultatively polyandrous bumblebee, Bombus hypnorum: the consequences of nest usurpation. Molecular Ecology 10: 2489-2498 (2001) Thiele, Rainer: Baumbestäubende Bienen im Nordosten Costa Ricas: Ökologie, Artenschutz und forstwirtschaftliche Relevanz der Centridini. Deutsche Gesellschaft für Technische Zusammenarbeit GmbH, Eschborn (Hrsg.) (2001) Zillikens, A., Steiner, J., Mihalko, Z.: Nests of Augochlora (A.) esox in Bromeliads, a Previously Unknown Site for Sweat Bees (Hymenoptera: Halictidae). Stud. Neotrop. Fauna & Environm. 36: 137-142 (2001) Bloch, G., Hefetz, A., Hartfelder, K.: Ecdysteroid titer, ovary status, and dominance in adult worker and queen bumble bees (Bombus terrestris). J. Insect Physiol. 46: 1033-1040 (2000) Chen, G., Handel, K., Roth, S.: The maternal NF-kB/Dorsal gradient of Trilobium castaneum: dynamics of early dorsoventral patterning in a short-germ beetle. Development 127: 5145-5156 (2000) Francke, W., Lübke, G, Schröder, W., Reckziege,l A., Imperatriz-Fonseca, V.L., Kleinert, A., Engels, E., Hartfelder, K., Radtke, R., Engels, W.: Identification of oxygen containing volatiles in cephalic secretions of workers of Brazilian stingless bees. J. Braz. Chem. Soc. 11: 562-571 (2000) Hartfelder, K.: Arthropoda - Insecta: Caste differentiation. In: Reproductive Biology of Invertebrates, Vol. X, Part B (Eds. K.G. and Rita G. Adiyodi; A. Dorn) Oxford & IBH Publ. 185-204 (2000) Hartfelder, K., Cnaani, J., Hefetz, A.: Caste-specific differences in ecdysteroid titers in early larval stages of the bumble bee Bombus terrestris: J. Insect Physiol. 46: 1433-1439 (2000) Hartfelder, K.: Insect juvenile hormone: from "status quo" to high society. Brazil. J. Med. Biol. Res. 33: 157-177 (2000) Kwet, Axel: The genus Pseudis (Anura: Pseudidae) in Rio Grande do Sul, southern Brazil, with description of a new species. Amphibia-Reptilia 21: 39-55 (2000) Mecke, R., Barbosa, M.S., Engels, W.: A new Brazilian sawfly, Derecyrta araucariae spec. nov. (Hymenoptera, Xiphydriidae), associated with Araucaria angustifolia (Bert.) O. Kuntze. J. Kansas Entomol. Soc. 73: 177-182 (2000 ) Mecke, R., Galileo, M.H.M., Engels, W.: Insetos e ácaros associados á Araucaria angustifolia (Araucariaceae, Coniferae) no sul do Brasil. Iheringia, Sér.Zool. 88: 165-172 (2000) Mecke, R.: Two new species of cossonine weevils, Araucarius kuscheli spec. nov. and A. crassipunctatus spec. nov. (Coleoptera: Curculionidae) from southern Brazil. Stud Neotrop Fauna & Environm 35: 195-199 (2000) Mohra, C., Fellendorf, M., Segelbacher, G., Paxton, R.J.: Dinucleotide microsatellite loci for Andrena vaga and other andrenid bees from non-enriched and CT-enriched libraries. 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