Publications

as of 09/2025 with “Cardiocondyla” in the title, abstract or main text, starting with August Forel’s description of the wingless males and intranidal mating in 1892, or as he termed it ‘reproduction consanguine perpétuée’

141. Süß LM, Oettler J & Jaimes-Niño L (2025) Fertility correlates with queen size and sperm quality in an ant. PLoS One. https://doi.org/10.1371/journal.pone.0336378

140. Cunningham P, Martín-Durán JM, Oettler J, Schultner E, Halitschke R, Engl T, Kaltenpoth M & Henry L (preprint) Metabolic plasticity supports a flexible nutritional symbiosis in Cardiocondyla ants. bioRxiv. https://doi.org/10.1101/2025.10.17.683034

139. Neupert J, Drechsel L, Heinze J, Schultner E (2025) Canalized weapon development but high levels of overall phenotypic variation in an evolutionarily novel ant male morph. Journal of Evolutionary Biology. https://doi.org/10.1093/jeb/voaf105

138. Nyckees D, Gonzalez de Vega R, Sittinger R, Clases D, Freitak D (preprint) Fitness related effects of titanium dioxide nanoparticles and glyphosate exposure on Cardiocondyla obscurior. Research Square. https://doi.org/10.21203/rs.3.rs-6860217/v1

137. Jaimes-Niño LM, Oettler J (2025) The pace and shape of ant ageing. Biological Reviews. https://doi.org/10.1111/brv.70035

136. Jaimes-Niño LM, Oettler J (2025) Correlation between mother and daughter life-history traits in Cardiocondyla obscurior. Insectes Sociaux. https://doi.org/10.1007/s00040-025-01032-2

135. Rissanen J, Freitak D (2025) Chronic exposure to nicotine in diet enhances the lethal effect of an entomopathogenic fungus in the ant Cardiocondyla obscurior. Biology Open. https://doi.org/10.1242/bio.061928

134. Seifert B (2024) A taxonomic revision of the ants of the Cardiocondyla wroughtonii group (Hymenoptera: Formicidae) with a checklist of the Cardiocondyla species of the world. Soil Organisms 96(2):113-144. https://doi.org/10.25674/415

133. van den Bos E, Gadau J, Schrader L (2024) Molecular identification of polymorphic transposable elements in populations of the invasive ant Cardiocondyla obscurior. Biology Methods and Protocols 9(1):bpae050. https://doi.org/10.1093/biomethods/bpae050

132. Errbii M, Gadau J, Becker K, Schrader L, Oettler J (2024) Causes and consequences of a complex recombinational landscape in the ant Cardiocondyla obscurior. Genome Research 34(6):863-876. https://doi.org/10.1101/gr.278392.123

131. Brülhart J, Süß A, Oettler J, Heinze J, Schultner E (2024). Sex- and caste-specific developmental responses to juvenile hormone in an ant with maternal caste determination. Journal of Experimental Biology 227(12):jeb247396. https://doi.org/10.1242/jeb.247396

130. Oettler J, Wallner T, Dofka B, Heinze J, Eichner N, Meister G, Errbii M, Rehli M, Gebhard C, Schultner E (preprint 2023) Darwin’s “neuters” and the evolution of the sex continuum in a superorganism. bioRxiv. https://doi.org/10.1101/2023.11.13.566820

129. Seifert B (2023) The Ant Genus Cardiocondyla (Hymenoptera: Formicidae): The Species Groups with Oriental and Australasian Origin. Diversity 15(1):25. https://doi.org/10.3390/d15010025

128. Seifert B (2023) A revision of the Palaearctic species of the ant genus Cardiocondyla Emery 1869 (Hymenoptera: Formicidae). Zootaxa 5274(1):1-64. https://doi.org/10.11646/ZOOTAXA.5274.1.1

127. Schultner E, Wallner T, Dofka B, Brülhart J, Heinze J, Freitak D, Pokorny T, Oettler J (2023) Queens control caste allocation in the ant Cardiocondyla obscurior. Proceedings of the Royal Society B: Biological Sciences 290:20221784. https://doi.org/10.1098/rspb.2022.1784

126. Jaimes-Niño LM, Süß A, Heinze J, Schultner E, Oettler J (preprint 2022) The indispensable soma of Cardiocondyla obscurior ants. bioRxiv. https://doi.org/10.1101/2022.10.02.510526

125. Vidal M, Heinze J (2022) Assisted dispersal and reproductive success in an ant species with matchmaking. Ecology and Evolution 12(8):e9236. https://doi.org/10.1002/ece3.9236

124. Jaimes-Niño LM, Heinze J, Oettler J (2022) Late-life fitness gains and reproductive death in Cardiocondyla obscurior ants. eLife 11:e74695. https://doi.org/10.7554/eLife.74695

123. Jackson R, Monnin D, Patapiou PA, Golding G, Helanterä H, Oettler J, Heinze J, Wurm Y, Economou CK, Chapuisat M, Henry LM (2022) Convergent evolution of a labile nutritional symbiosis in ants. The ISME Journal 16:2114-2122. https://doi.org/10.1038/s41396-022-01256-1

122. Leponiemi M, Schultner E, Dickel F, Freitak D (2022) Chronic sublethal pesticide exposure affects brood production, morphology, and endosymbionts, but not immunity in the ant, Cardiocondyla obscurior. Ecological Entomology 47(3):273-283. https://doi.org/10.1111/een.13111

121. Ün Ç, Hacker J, Heinze J, Oettler J, Schultner E (2022) Endosymbionts mediate the effects of antibiotic exposure in the tramp ant Cardiocondyla obscurior. Ecological Entomology 47(2):170-180. https://doi.org/10.1111/een.13099

120. Majeed W, Koch EBA, Rana N, Naseem R (2021) First Record of Cardiocondyla obscurior Wheeler, 1929 (Hymenoptera: Formicidae: Myrmicinae) for Pakistan. Sociobiology 68(3):e5907. https://doi.org/10.13102/sociobiology.v68i3.5907

119. Errbii M, Keilwagen J, Hoff KJ, Steffen R, Altmüller J, Oettler J, Schrader L (2021) Transposable elements and introgression introduce genetic variation in the invasive ant Cardiocondyla obscurior. Molecular Ecology 30(23):6211-6228. https://doi.org/10.1111/mec.16099

118. Heinze J, Marschall J, Lautenschläger B, Seifert B, Gratiashvili N, Strohm E (2021) Courtship with two spoons-Anatomy and presumed function of the bizarre antennae of Cardiocondyla zoserka ant males. Ecology and Evolution 11(12):7827–7833. https://doi.org/10.1002/ece3.7615

117. Harrison MC, Niño LMJ, Rodrigues MA, Ryll J, Flatt T, Oettler J, Bornberg-Bauer E (2021) Gene coexpression network reveals highly conserved, well-regulated anti-ageing mechanisms in old ant queens. Genome Biology and Evolution 13(6):evab093. https://doi.org/10.1093/gbe/evab093

116. Ün Ç, Schultner E, Manzano-Marín A, Flórez LV, Seifert B, Heinze J, Oettler J (2021) Cytoplasmic incompatibility between Old and New World populations of a tramp ant. Evolution 75:1775–1791. https://doi.org/10.1111/evo.14261

115. Vidal M, Königseder F, Giehr J, Schrempf A, Lucas C, Heinze J (2021) Worker ants promote outbreeding by transporting young queens to alien nests. Communications Biology 4(1):515. https://doi.org/10.1038/s42003-021-02016-1

114. Heinze J, Giehr J (2021) The plasticity of lifespan in social insects. Philosophical Transactions of the Royal Society B: Biological Sciences 376(1823):20190734. https://doi.org/10.1098/rstb.2019.0734

113. Schrader L, Winter M, Errbii M, Delabie J, Oettler J, Gadau J (2021) Inhibition of HSP90 causes morphological variation in the invasive ant Cardiocondyla obscurior. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 336:333–340. https://doi.org/10.1002/jez.b.23035

112. Oettler J (2021) Cardiocondyla: Heart Node Ants. In: Starr CK, editor. Encyclopedia of Social Insects. Springer, Cham. https://doi.org/10.1007/978-3-030-28102-1_19

111. Heinze J, Trindl A, Seifert B, Ma MK, Maung W (2020) First records of Cardiocondyla ants from Myanmar. Asian Myrmecology 12:1–8. https://doi.org/10.20362/am.012005

110. Heinze J (2019) Emeryia, Xenometra, zoserka: it’s a boy, again! The misleading morphology of Cardiocondyla male ants. Insectes Sociaux 67(1):139–146. https://doi.org/10.1007/s00040-019-00737-5

109. Jacobs S, Heinze J (2019) Population and colony structure of an ant with territorial males, Cardiocondyla venustula. BMC Evolutionary Biology 19(1):115–119. https://doi.org/10.1186/s12862-019-1448-6

108. Liu L, Wu Y, Chen F, Wang Q-X, Zhang X-Y, Tang Y, Li F, Qian Z-Q (2019) Characterization of the complete mitochondrial genome of the invasive tramp ant Cardiocondyla obscurior (Hymenoptera: Formicidae: Myrmicinae). Mitochondrial DNA Part B 4(1):1496–1498. https://doi.org/10.1080/23802359.2019.1601522

107. Heinze J, Frohschammer S, Bernadou A (2019) When invasive ants meet: effects of outbreeding on queen performance in the tramp ant Cardiocondyla itsukii. Insect Science 26(2):333–340. https://doi.org/10.1111/1744-7917.12530

106. Oettler J, Platschek T, Schmidt C, Rajakumar R, Favé M-J, Khila A, Abouheif E (2019) Interruption points in the wing gene regulatory network underlying wing polyphenism evolved independently in male and female morphs in Cardiocondyla ants. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 332(1-2):7–16. https://doi.org/10.1002/jez.b.22834

105. Heinze J, Hanoeffner M, Delabie JHC, Schrempf A (2018) Methuselah’s daughters: Paternal age has little effect on offspring number and quality in Cardiocondyla ants. Ecology and Evolution 8(23):12066–12072.  https://doi.org/10.1002/ece3.4666

104. Schmidt CV, Jürgen H (2018) Mandible morphology reflects the type of male antagonism in the ant genus Cardiocondyla (Hymenoptera: Formicidae). European Journal of Entomology 115:455–466. https://doi.org/10.14411/eje.2018.047

103. Fuessl M, Santos CG, Hartfelder K, Schrempf A, Heinze J (2018) Accessory gland proteins of males in the male-diphenic ant Cardiocondyla obscurior. Physiological Entomology 43(4):276–284. https://doi.org/10.1111/phen.12257

102. Metzler S, Schrempf A, Heinze J (2018) Individual- and ejaculate-specific sperm traits in ant males. Journal of Insect Physiology 107:284–290. https://doi.org/10.1016/j.jinsphys.2017.12.003

101. Giehr J, Heinze J, Schrempf A (2017) Group demography affects ant colony performance and individual speed of queen and worker aging. BMC Evolutionary Biology 17(1):173. https://doi.org/10.1186/s12862-017-1026-8

100. Seifert B, Okita I, Heinze J (2017) A taxonomic revision of the Cardiocondyla nuda group (Hymenoptera: Formicidae). Zootaxa 4290(2):324–356. https://doi.org/10.11646/zootaxa.4290.2.4

99. Giehr J, Grasse AV, Cremer S, Heinze J, Schrempf A (2017) Ant queens increase their reproductive efforts after pathogen infection. Royal Society Open Science 4(7):170547. https://doi.org/10.1098/rsos.170547

98. Schmidt CV, Heinze J (2017) Genital morphology of winged and wingless males in the ant genus Cardiocondyla (Formicidae, Myrmicinae). Insect Systematics & Evolution 49(1):59–80. https://doi.org/10.1163/1876312X-48022163

97. Heinze J (2017) Life-history evolution in ants: the case of Cardiocondyla. Proceedings of the Royal Society B: Biological Sciences 284:20161406. https://doi.org/10.1098/rspb.2016.1406

96. Schrader L, Helanterä H, Oettler J (2017) Accelerated evolution of developmentally biased genes in the tetraphenic ant Cardiocondyla obscurior. Molecular Biology and Evolution 34(3):535–544. https://doi.org/10.1093/molbev/msw240

95. Schmidt CV, Heimbucher A, Bernadou A, Heinze J (2017) First come, first served: the first-emerging queen monopolizes reproduction in the ant Cardiocondyla “argyrotricha.” Journal of Ethology 35(1):21–27.

94. Schrempf A, Giehr J, Röhrl R, Steigleder S, Heinze J (2017) Royal darwinian demons: Enforced changes in reproductive efforts do not affect the life expectancy of ant queens. The American Naturalist 189:436–442. https://doi.org/10.1086/691000

93. Seifert B, Okita I, Heinze J (2017) A taxonomic revision of the Cardiocondyla nuda group (Hymenoptera: Formicidae). Zootaxa 4290:324–356. https://doi.org/10.11646/zootaxa.4290.2.4

92. Metzler S, Heinze J, Schrempf A (2016) Mating and longevity in ant males. Ecology and Evolution 6(24):8903–8906. https://doi.org/10.1002/ece3.2474

91. Schrempf A, Moser A, Delabie J, Heinze J (2016) Sperm traits differ between winged and wingless males of the ant Cardiocondyla obscurior. Integrative Zoology 11(6):427–432. https://doi.org/10.1111/1749-4877.12191

90. Oettler J, Schrempf A (2016) Fitness and aging in Cardiocondyla obscurior ant queens. Current Opinion in Insect Science 16:58–63. https://doi.org/10.1016/j.cois.2016.05.010

89. Heinze J, Seifert B, Zieschank V (2016) Massacre of the innocents in Cardiocondyla thoracica: Manipulation by adult ant males incites workers to kill their immature rivals. Entomological Science 19(3):239–244. https://doi.org/10.1111/ens.12194

88. Heinze J (2016) The male has done his work–the male may go. Current Opinion in Insect Science 16:22–26. https://doi.org/10.1016/j.cois.2016.05.005

87. Jacobs S, Heinze J (2017) Between fighting and tolerance: reproductive biology of wingless males in the ant Cardiocondyla venustula. Insect Science 24(5):818-828. https://doi.org/10.1111/1744-7917.12359

86. Wyschetzki von K, Lowack H, Heinze J (2016) Transcriptomic response to injury sheds light on the physiological costs of reproduction in ant queens. Molecular Ecology 25(9):1972–1985.

85. Okita I, Tsuchida K (2016) Clonal reproduction with androgenesis and somatic recombination: the case of the ant Cardiocondyla kagutsuchi. Naturwissenschaften 103(3-4):22.

84. Klein A, Schultner E, Lowak H, Schrader L, Heinze J, Holman L, Oettler J (2016) Evolution of social insect polyphenism facilitated by the sex differentiation cascade. PLoS Genetics 12(3):e1005952. https://doi.org/10.1371/journal.pgen.1005952

83. Schmidt CV, Schrempf A, Trindl A, Heinze J (2016) Microsatellite markers for the tramp ant, Cardiocondyla obscurior (Formicidae: Myrmicinae). Journal of Genetics 95(1):e1–4.

82. von Wyschetzki K, Rueppell O, Oettler J, Heinze J (2015) Transcriptomic signatures mirror the lack of the fecundity/longevity trade-off in ant queens. Molecular Biology and Evolution 32(12):3173–3185. https://doi.org/10.1093/molbev/msv186

81. Rueppell O, Königseder F, Heinze J, Schrempf A (2015) Intrinsic survival advantage of social insect queens depends on reproductive activation. Journal of Evolutionary Biology 28(12):2349–2354.

80. Okita I, Terayama M, Tsuchida K (2015) Cryptic Lineages in the Cardiocondyla sl. kagutsuchi Terayama (Hymenoptera: Formicidae) discovered by phylogenetic and morphological approaches. Sociobiology 62(3):401.

79. Schrempf A, von Wyschetzki K, Klein A, Schrader L, Oettler J, Heinze J (2015) Mating with an allopatric male triggers immune response and decreases longevity of ant queens. Molecular Ecology 24(14):3618–3627. https://doi.org/10.1111/mec.13267

78. Schrader L, Simola DF, Heinze J, Oettler J (2015) Sphingolipids, transcription factors, and conserved toolkit genes: Developmental plasticity in the ant Cardiocondyla obscurior. Molecular Biology and Evolution 32(6):1474–1486. https://doi.org/10.1093/molbev/msv039

77. Klein A, Schrader L, Gil R, Manzano-Marín A, Flórez L, Wheeler D, Werren JH, Latorre A, Heinze J, Kaltenpoth M, Moya A, Oettler J (2015) A novel intracellular mutualistic bacterium in the invasive ant Cardiocondyla obscurior. The ISME Journal 10(2):376–388. https://doi.org/10.1038/ismej.2015.119

76. Oettler J, Nachtigal A-L, Schrader L (2015) Expression of the foraging gene is associated with age polyethism, not task preference, in the ant Cardiocondyla obscurior. PLoS ONE 10(12):e0144699. https://doi.org/10.1371/journal.pone.0144699

75. Kramer BH, Schrempf A, Scheuerlein A, Heinze J (2015) Ant Colonies Do Not Trade-Off Reproduction against Maintenance. PLoS ONE. 10(9):e0137969.

74. Fuessl M, Schrempf A, Heinze J (2015) Queen and male longevity in the Southeast Asian ant Cardiocondyla tjibodana Karavaiev, 1935. Asian Myrmecology 7:137–141.

73. Sánchez-García D, Espadaler X (2015) Cardiocondyla obscurior Wheeler, 1929 (Hymenoptera, Formicidae) in Spain. Iberomyrmex 7:7-9.

72. Fuessl M, Reinders J, Oefner PJ, Heinze J, Schrempf A (2014) Selenophosphate synthetase in the male accessory glands of an insect without selenoproteins. Journal of Insect Physiology 71:46–51.

71. Heinze J, Schrempf A, Wanke T, Rakotondrazafy H, Rakotondrazafy T, Fisher BL (2014) Polygyny, Inbreeding and Wingless Males in the Malagasy Ant Cardiocondyla shuckardi Forel (Hymenoptera, Formicidae). Sociobiology 6:300–306.

70. Schrempf A (2014) Inbreeding, multiple mating and foreign sexuals in the ant Cardiocondyla nigra (Hymenoptera: Formicidae). Myrmecological News 20:1–5.

69. Schrader L, Kim JW, Ence D, Zimin A, Klein A, Wyschetzki K, Weichselgartner T, Kemene C, Stöckl J, Schultner E, Wurm Y, Smith CD, Yandell M, Heinze J, Gadau J, Oettler J (2014) Transposable element islands facilitate adaptation to novel environments in an invasive species. Nature Communications 5:5495. https://doi.org/10.1038/ncomms6495

68. Bressan JMA, Benz M, Oettler J, Heinze J, Hartenstein V, Sprecher SG (2014) A map of brain neuropils and fiber systems in the ant Cardiocondyla obscurior. Frontiers in Neuroanatomy 8:166. https://doi.org/10.3389/fnana.2014.00166

67. Schmidt CV, Frohschammer S, Schrempf A, Heinze J (2013) Virgin ant queens mate with their own sons to avoid failure at colony foundation. Naturwissenschaften 101(1):69–72.

66. Heinze J, Frohschammer S, Bernadou A (2013) Queen life-span and total reproductive success are positively associated in the ant Cardiocondyla cf. kagutsuchi. Behavioral Ecology and Sociobiology 67(10):1555–1562.

65. Seifert B, Frohschammer S (2013) Cardiocondyla pirata sp. n. – a new Philippine ant with enigmatic pigmentation pattern (Hymenoptera, Formicidae). Zookeys 301:13–24.

64. Okita I, Terayama M (2013) The spatial distribution of mtDNA and phylogeographic analysis of the ant Cardiocondyla kagutsuchi (Formicidae) in Japan. Sociobiology 60:129–134.

63. Will S, Delabie JHC, Heinze J, Ruther J, Oettler J (2012) Cuticular lipid profiles of fertile and non-fertile Cardiocondyla ant queens. Journal of Insect Physiology 58(9):1245–1249. https://doi.org/10.1016/j.jinsphys.2012.06.009

62. Wetterer JK (2012) Worldwide spread of Emery’s sneaking ant, Cardiocondyla emeryi (Hymenoptera: Formicidae). Myrmecological News 17:13-20.

61. Heinze J, Aumeier V, Bodenstein B, Crewe RM, Schrempf A (2012) Wingless and intermorphic males in the ant Cardiocondyla venustula. Insectes Sociaux 60(1):43–48.

60. Wetterer JK (2012) Worldwide spread of the moorish sneaking ant, Cardiocondyla mauritanica (Hymenoptera: Formicidae). Sociobiology 59(3):985–997.

59. Heinze J, Schrempf A (2012) Terminal investment: individual reproduction of ant queens increases with age. PLoS ONE 7(4):e35201.

58. Cremer S, Suefuji M, Schrempf A, Heinze J (2011) The dynamics of male-male competition in Cardiocondyla obscurior ants. BMC Ecology 12:7–7.

57. Yoshizawa J, Yamauchi K, Tsuchida K (2011) Decision-making conditions for intra- or inter-nest mating of winged males in the male-dimorphic ant Cardiocondyla minutior. Insectes Sociaux 58(4):531–538.

56. Schrempf A, Cremer S, Heinze J (2011) Social influence on age and reproduction: reduced lifespan and fecundity in multi-queen ant colonies. Journal of Evolutionary Biology 24(7):1455–1461.

55. Cremer S, Schrempf A, Heinze J (2011) Competition and opportunity shape the reproductive tactics of males in the ant Cardiocondyla obscurior. PLoS ONE 6(3):e17323.

54. Heinze J, Weber M (2011) Lethal sibling rivalry for nest inheritance among virgin ant queens. Journal of Ethology 29:197–201.

53. Oettler J, Suefuji M, Heinze J (2010) The evolution of alternative reproductive tactics in male Cardiocondyla ants. Evolution 64(11):3310–3317. https://doi.org/10.1111/j.1558-5646.2010.01090.x

52. Ugelvig LV, Kronauer DJC, Schrempf A, Heinze J, Cremer S (2010) Rapid anti-pathogen response in ant societies relies on high genetic diversity. Proceedings of the Royal Society B: Biological Sciences 277(1695):2821–2828.

51. Heinze J, Schmidt CV, Nugroho H, Seifert B (2010) Wingless fighter males in the Wallacean ant Cardiocondyla nigrocerea (Insecta: Formicidae). The Raffles Bulletin of Zoology 58:1–6.

50. Frohschammer S, Heinze J (2009) A heritable component in sex ratio and caste determination in a Cardiocondyla ant. Frontiers in Zoology 6:27.

49. Suefuji M, Cremer S, Oettler J, Heinze J (2008) Queen number influences the timing of the sexual production in colonies of Cardiocondyla ants. Biology Letters 4(6):670–673. https://doi.org/10.1098/rsbl.2008.0355

48. Frohschammer S, Heinze J (2008) Male fighting and “territoriality” within colonies of the ant Cardiocondyla venustula. Naturwissenschaften 96(1):159–163.

47. Yoshizawa J, Mimori K, Yamauchi K, Tsuchida K (2008) Sex mosaics in a male dimorphic ant Cardiocondyla kagutsuchi. Naturwissenschaften 96(1):49–55.

46. Cremer S, D’Ettorre P, Drijfhout FP, Sledge MF, Turillazzi S, Heinze J (2008) Imperfect chemical female mimicry in males of the ant Cardiocondyla obscurior. Naturwissenschaften 95(11):1101–1105.

45. Schrempf A, Heinze J (2008) Mating with stressed males increases the fitness of ant queens. PLoS ONE 3(7):e2592.

44. Seifert B (2008) Cardiocondyla atalanta Forel, 1915, a cryptic sister species of Cardiocondyla nuda (Mayr, 1866) (Hymenoptera: Formicidae). Myrmecological News 11:43–48.

43. Mercier JL, Lenoir JC, Eberhardt A, Frohschammer S, Williams C, Heinze J (2007) Hammering, mauling, and kissing: stereotyped courtship behavior in Cardiocondyla ants. Insectes Sociaux 54(4):403–411.

42. Yamauchi K, Ishida Y, Hashim R, Heinze J (2007) Queen-queen competition and reproductive skew in a Cardiocondyla ant. Insectes Sociaux 54(3):268–274.

41. Schrempf A, Heinze J (2007) Back to one: consequences of derived monogyny in an ant with polygynous ancestors. Journal of Evolutionary Biology 20(2):792–799.

40. Schrempf A, Darrouzet E, Heinze J (2007) Mating success and potential male-worker conflict in a male-dimorphic ant. BMC Evolutionary Biology 7(1):114.

39. Du Y, Schrempf A, Heinze J (2007) Environmental determination of the male morph in the ant Cardiocondyla obscurior (Hymenoptera : Formicidae). European Journal of Entomology 104(2):243–246.

38. Yamauchi K, Ishida Y, Hashim R, Heinze J (2006) Queen-queen competition by precocious male production in multiqueen ant colonies. Current Biology 16(24):2424–2427.

37. Lenoir JC, Schrempf A, Lenoir A, Heinze J, Mercier JL (2006) Genetic structure and reproductive strategy of the ant Cardiocondyla elegans: strictly monogynous nests invaded by unrelated sexuals. Molecular Ecology 16(2):345–354.

36. Schrempf A, Aron S, Heinze J (2006) Sex determination and inbreeding depression in an ant with regular sib-mating. Heredity 97(1):75–80.

35. Schrempf A, Heinze J (2006) Proximate mechanisms of male morph determination in the ant Cardiocondyla obscurior. Evolution and Development 8(3):266–272.

34. Heinze J, Cremer S, Eckl N, Schrempf A (2006) Stealthy invaders: the biology of Cardiocondyla tramp ants. Insectes Sociaux 53:1–7.

33. Heinze J, Delabie J (2005) Population structure of the male-polymorphic ant Cardiocondyla obscurior. Studies on Neotropical Fauna and Environment 40(3):187–190.

32. Heinze J, Trindl A, Seifert B, Yamauchi K (2005) Evolution of male morphology in the ant genus Cardiocondyla. Molecular Phylogenetics and Evolution 37(1):278–288.

31. Yamauchi K, Asano Y, Lautenschläger B, Trindl A, Heinze J (2005) A new type of male dimorphism with ergatoid and short-winged males in Cardiocondyla cf. kagutsuchi. Insectes Sociaux 52(3):274–281.

30. Schrempf A, Heinze J, Cremer S (2005) Sexual cooperation: mating increases longevity in ant queens. Current Biology 15(3):267–270.

29. de Menten L, Cremer S, Heinze J, Aron S (2005) Primary sex ratio adjustment by ant queens in response to local mate competition. Animal Behaviour 69:1031–1035.

28. Schrempf A, Reber C, Tinaut A, Heinze J (2004) Inbreeding and local mate competition in the ant Cardiocondyla batesii. Behavioral Ecology and Sociobiology 57(5):502–510.

27. Heinze J, Böttcher A, Cremer S (2004) Production of winged and wingless males in the ant, Cardiocondyla minutior. Insectes Sociaux 51(3)275-278.

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