Trilobite Eggs & Reproduction

Alberti, G. K. B. 1971. Sexual-Dimorphismus (?) bei Cheirurus (Crotalocephalus) cf. pauper Barrande, 1852 (Trilobita, Devon). Paläontologische Zeitschrift 45: 167-172.

Barrande, J. 1872. Systême silurien du centre de la Bohême, Ière Partie; Recherches paléontologiques, I. Supplément. 647.

Bernárdez, E., J. Esteve, L. Laibl, I. Rábano, and J. C. Gutiérrez Marco. 2019. Early post-embryonic trilobite stages and possible eggs from the ‘Tunel Ordovıcico del Fabar’ (Middle Ordovician, northwestern Spain). Fossils and Strata 64: 23-33.

Bicknell, R. D. C., J. R. Paterson, and M. J. Hopkins. 2019. A trilobite cluster from the Silurian Rochester Shale of New York: predation patterns and possible defensive behavior. American Museum Novitates 2019: 1-16.

Cederström, P., P. Ahlberg, C. H. Nilsson, J. Ahlgren, and M. E. Eriksson. 2011. Moulting, ontogeny and sexual dimorphism in the Cambrian ptychopariid trilobite Strenuaeva inflata from the northern Swedish Caledonides. Palaeontology 54: 685-703.

Chatterton, B. D. E., and R. A. Fortey. 2008. Linear clusters of articulated trilobites from lower Ordovician (Arenig) strata at Bini Tinzoulin, North of Zagora, Southern Morocco. Cuadernos del Museo Geominero, n°9 Advances in Trilobite Research: 73-78.

Clarkson, E. N. K. 1969. Dimorphism of the eye in Weberides shunnerensis (King) [Trilobita]. In Sexual dimorphism in fossil Metazoa and taxonomic implications, G. E. G. Westermann, ed. E. Schweizerbart’sche Verlagsbuchhandlung (Nägele u. Obermiller), Stuttgart, p. 185-195.

Endo, R., and C. E. Resser. 1937. The Sinian and Cambrian formations and faunas of southern Manchoukuo. Manchurian Science Museum Bulletin 1: 1-474.

Fortey, R. A., and N. C. Hughes. 1998. Brood pouches in trilobites. Journal of Paleontology 72: 638-649.

Goo, C. 2021. Trilobites sexual dimorphism - The discover of the oldest known morphological difference between male and female dating back to Cambrian. Smashwords Edition,

Gozalo, R., E. Liñan, and M. E. Dies. 2003. Intraspecific dimorphism in an evolutionary series of paradoxidids from the Middle Cambrian of Murero, Spain. Special Papers in Palaeontology 70: 141-156.

Gutiérrez Marco, J. C., A. A. Sá, D. García-Bellido, I. Rábano, and M. Valério. 2009. Giant trilobites and trilobite clusters from the Ordovician of Portugal. Geology 37: 443-446.

Hegna, T. A., M. J. Martin, and S. A. F. Darroch. 2017. Pyritized trilobite eggs from the Ordovician of New York (Lorraine Group): Implications for trilobite reproductive biology. Geology 45: 199-202.

Hu, C.-H. 1963. The dimorphism and ontogeny of Norwoodella halli Resser. Transactions and Proceedings of the Palaeontological Society of Japan, N. S. 52: 129-132.

Hu, C.-H. 1964. Ontogeny and dimorphism of the trilobite Peltura scarabaeoides (Wahlenberg) from the Upper Cambrian of Norway. Journal of the Palaeontological Society of India 5-9: 39-44.

Hu, C.-H. 1964. The ontogeny and dimorphism of Welleraspis lata Howell (Trilobita). Journal of Paleontology 38: 95-97.

Hu, C.-H. 1968. Notes on the ontogeny and sexual dimorphism of Upper Cambrian trilobites of the Welleraspis faunule from Pennsylvania. Journal of Nanyang University 2: 321-357.

Hu, C.-H. 1968. Ontogeny and sexual dimorphism of lower Paleozoic Trilobita. Ph.D: 404.

Hu, C.-H. 1969. Ontogeny and sexual dimorphism of three Upper Cambrian trilobites. Journal of Nanyang University 3: 438-462.

Hu, C.-H. 1970. Ontogenies and sexual dimorphisms of two upper Cambrian trilobites. Proceedings of the Geological Society of China 13: 143-155.

Hu, C.-H. 1971. Ontogeny and sexual dimorphism of lower Paleozoic Trilobita. Palaeontographica Americana 7: 31-155.

Hughes, N. C., and R. A. Fortey. 1995. Sexual dimorphism in trilobites, with an Ordovician case study. Field Trip Guidebook - Pacific Section, Society of Economic Paleontologists and Mineralogists 77: 419-421.

Karim, T., and S. R. Westrop. 2002. Taphonomy and paleoecology of Ordovician trilobite clusters, Bromide Formation, south-central Oklahoma. Palaios 17: 394-403.

Lemche, H. 1957. Supposed asexual reproduction in trilobites. Nature 180: 801-802.

Lin, J.-P., A. C. Scott, C.-W. Li, H.-J. Wu, W. I. Ausich, Y.-L. Zhao, and Y.-K. Hwu. 2006. Silicified egg clusters from a Middle Cambrian Burgess Shale-type deposit, Guizhou, south China. Geology 34: 1037-1040.

Losso, S. R., and J. Ortega-Hernández. 2022. Claspers in the mid-Cambrian Olenoides serratus indicate horseshoe crab–like mating in trilobites. Geology 50: 897-901.

Paterson, J. R., J. B. Jago, G. A. Brock, and J. G. Gehling. 2007. Taphonomy and palaeoecology of the emuellid trilobite Balcoracania dailyi (early Cambrian, South Australia). Palaeogeography Palaeoclimatology Palaeoecology 249: 302-321.

Paterson, J. R., N. C. Hughes, and B. D. E. Chatterton. 2008. Trilobite clusters: what do they tell us? A preliminary investigation. Cuadernos del Museo Geominero, n°9 Advances in Trilobite Research: 313-318.

Pillet, J. 1992. Variabilite intraspecifique et dimorphisme sexuel chez quelques Trilobites [Intraspecific variability and sexual dimorphism in some trilobites]. Bulletin de la Societe des Sciences Naturelles de l’Ouest de la France (l983) 14: 53-64.