2009
Agnarsson I, Kuntner M, Coddington J, Blackledge TA. 2009. Shifting spiders, not behaviors: independent colonization of Madagascar by solitary and subsocial Anelosimus lineages. Zoologica Scripta (in press)
Agnarsson I, Blackledge T. 2009. Can a spider web be too sticky? Tensile mechanics constrains the evolution of capture spiral stickiness in orb weaving spiders. Journal of Zoology 277: 134-140) Download article (pdf).
Agnarsson I, Boutry C, Wong S-C, Baji A, Dhinojwala A, Sensenig AT, Blackledge TA. 2009. Rate dependent supercontraction of spider dragline silk. Zoology 112: 325-331 Download article (pdf).
Agnarsson I, Dhinojwala A, Sahni V, Blackledge TA. 2009. Spider silk as a novel high performance biomimetic muscle driven by humidity. Journal of Experimental Biology 212: 1990-1994 Download article (pdf).
Blackledge TA, Boutry C, Wong S-C, Baji A, Dhinojwala A, Sahni V, Agnarsson I. 2009. How super is supercontraction? Permanent versus cyclic responses to humidity in spider dragline silk. Journal of Experimental Biology 212: 1981-1989 Download article (pdf).
Blackledge T, Coddington JA, Agnarsson I. 2009. Fecundity increase supports adaptive radiation hypothesis in spider web evolution. Communicative & Integrative Biology 2: 1-5 Download article (pdf).
Blackledge TA, Coddington J, Scharff N, Szuts T, Wenzel J, Hayashi C, Agnarsson I. 2009. Reconstructing web evolution and spider diversification in the molecular era. Proceedings of the National Academy of Sciences 106: 5229-5234. Download article (pdf).
Coddington JA, Agnarsson I, Miller J, Kuntner M, Hormiga G. 2009. Undersampling bias: the null hypothesis for singleton species in tropical arthropod biodiversity surveys. Journal of Animal Ecology 78: 573-584.Download article (pdf).
Kuntner M, Agnarsson I. 2009. Phylogeny accurately predicts behavior in Indian Ocean Clitaetra spiders (Araneae: Nephilidae) Invertebrate Systematics 23: 193-204. Download article (pdf).
Kuntner M, Gregorič M, Agnarsson I. 2009. Spider eunuch phenomenon induced by aggressiveness from rival male or mated female. Journal of Arachnology 37: xxx-xxx (in press)
2008
Agnarsson I, Boutry C, Blackledge T. 2008. Spider silk aging: initial improvement in a high performance material followed by slow degradation.
Journal of Experimental Zoology Part A: Ecological Genetics and Physiology 309A: 494-504. Download article (pdf).
Agnarsson I, Coddington JA. 2008. Quantitative tests of primary homology. Cladistics 24: 51-61. Download article (pdf).
Agnarsson I, May-Collado L. 2008. The phylogeny of Cetartiodactyla: the importance of dense taxon sampling, missing data,
and the remarkable promise of Cytochrome b to provide reliablespecies-level phylogenies. Molecular Phylogenetics and
Agnarsson I, Miller J. 2008. Is ACCTRAN better than DELTRAN? Cladistics 24: 1032-1038. Download article (pdf).
Eberhard WG, Agnarsson I, Levi HW. 2008. Web forms and phylogeny of theridiid spider (Araneae: Theridiidae): chaos
2007
Agnarsson I, Coddington JA, Knoflach B. 2007. Morphology and evolution of cobweb spider male genitalia (Araneae: Theridiidae). Journal of Arachnology 35: 334-395 Download article (pdf).
Agnarsson I, Coddington JA, May-Collado LJ. 2007. Elongated pedicillate setae – a putative sensory system and synapomorphy of spiders. Journal of Arachnology 35: 411-426. Download article (pdf).
Agnarsson I, Kuntner M. 2007. Taxonomy in a changing world: seeking solutions for a science in crisis. Systematic Biology 56: 531-539. Download article (pdf).
Agnarsson I, Maddison WP, Avilés L. 2007. The phylogeny of the social Anelosimus spiders (Araneae: Theridiidae) inferred from six molecular loci and morphology. Molecular Phylogenetics and Evolution 43: 833-851. Request a reprint.
Arnedo MA, Agnarsson I, Gillespie RG. 2007. Molecular insights into the phylogenetic structure of the spider genus Theridion (Araneae, Theridiidae) and the origin of the Hawaiian Theridion-like fauna. Zoologica Scripta 36: 337-352. Download article (pdf).
Avilés L, Agnarsson I, Salazar P, Purcell J, Iturralde G, Yip E, Powers KS, Bukowski T. 2007. Altitudinal pattern of sociality in the spider genus Anelosimus and the biology of a new mid-elevation social species in Ecuador. American Naturalist 170: 783-792. Download article (pdf).
May-Collado LJ, Agnarsson I, Wartzok D. 2007b. A phylogenetic review of tonal sound production in whales. BMC Evolutionary Biology 7: 136. Download article (pdf).
May-Collado LJ, Agnarsson I, Wartzok D. 2007. Reexamining the relationship between body size and tonal signal frequency in whales: a comparative approach using a novel phylogeny. Marine Mammal Science 121: 1203-1212. Download article (pdf.)
2006
Agnarsson I. 2006a. Asymmetric female genitalia and other remarkable morphology in a new genus of cobweb spiders (Theridiidae, Araneae) from Madagascar. Biological Journal of the Linnean Society 87: 211-232. Download article (pdf).
Agnarsson I. 2006b. A revision of the New World eximius group of Anelosimus (Araneae, Theridiidae) and a phylogenetic analysis using worldwide exemplars. Zoological Journal of the Linnean Society 146: 453-593. Download article (pdf).
Agnarsson I. 2006c. Phylogenetic placement of Echinotheridion (Araneae: Theridiidae) - do male sexual organ removal, emasculation, and sexual cannibalism in Echinotheridion and Tidarren represent evolutionary replicas? Invertebrate Systematics 20: 415-429. Download article (pdf).
Agnarsson I, Avilés L, Coddington JA, Maddison WP. 2006. Social theridiid spiders – repeated origins of an evolutionary dead-end. Evolution 60: 2342-2351. pdf.
Agnarsson I, Barrantes G, May-Collado L. 2006. Notes on the biology of Anelosimus pacificus Levi, 1963 (Theridiidae, Araneae) - evidence for an evolutionary reversal to a less social state. Journal of Natural History 40: 2681-2687. pdf.
Agnarsson I, Coddington JA. 2006. Notes on web and web plasticity and description of the male of Achaearanea heiroglyphica (Mello-Leitão) (Theridiidae, Araneae). Journal of Arachnology 34: 638-641. pdf.
Agnarsson I, Zhang JX. 2006. New species of Anelosimus (Theridiidae, Araneae) from Southeast Asia and Africa, with notes on sociality and color polymorphism. Zootaxa 1147: 1-34. Request reprint.
Avilés L, Maddison WP, Agnarsson I. 2006. Theridion nigroannulatum - an independently-derived highly social spider with explosive colony proliferation and a female size dimorphism. Biotropica 38: 743-753. Download article (pdf).
Coddington JA, Agnarsson I. 2006. Subsociality in Helvibis thorelli (Theridiinae, Theridiidae, Araneae) from French Guiana. Journal of Arachnology 34: 642-645. pdf.
Kuntner M, Agnarsson I. 2006. Are the Linnean and Phylogenetic Nomenclatural Systems Combinable? Recommendations for Biological Nomenclature. Systematic Biology 55: 774-784. Download article (pdf).
May-Collado L, Agnarsson I, 2006. Cytochrome b and Bayesian inference of whale phylogeny. Molecular Phylogenetics and Evolution 38: 344-354. Download article (pdf).
2005
Agnarsson I. 2005. A revision and phylogenetic analysis of the American ethicus and rupununi groups of Anelosimus (Araneae, Theridiidae). Zoologica Scripta 34: 389–413.Download article (pdf).
Agnarsson I, Kuntner M. 2005. Madagascar: an Unexpected Hotspot of Social Anelosimus Spider Diversity (Araneae: Theridiidae). Systematic Entomology 30: 575-592. Download article (pdf).
Miller JA, Agnarsson I. 2005. A redescription of Chrysso nigriceps (Araneae, Theridiidae) with evidence for maternal care. Journal of Arachnology 33: 711-717. Download article (pdf).
2004
Agnarsson I. 2004. Morphological phylogeny of cobweb spiders and their relatives (Araneae, Araneoidea, Theridiidae). Zoological Journal of the Linnean Society 141: 447-626. Download article (pdf). Alternative download in parts: part 1; part 2; part 3.
Arnedo MA, Coddington J, Agnarsson I, Gillespie RG. 2004. From a comb to a tree: Phylogenetic relationships of the comb-footed spiders (Araneae, Theridiidae) inferred from nuclear and mitochondrial genes. Molecular Phylogenetics and Evolution 31: 225-245. Download article (pdf).
2003
Agnarsson I. 2003b. Spider webs as habitat patches - The distribution of kleptoparasites (Argyrodes, Theridiidae) among host webs (Nephila, Tetragnathidae). Journal of Arachnology 31: 344-349. Download article (pdf).
Agnarsson I. 2003c. The phylogenetic placement and circumscription of the genus Synotaxus (Araneae: Synotaxidae) with a description of a new species from Guyana, and notes on theridioid phylogeny. Invertebrate Systematics 17: 719-734 Download article (pdf).
Ingólfsson A, Agnarsson I. 2003. Amphipods and isopods in the rocky intertidal: Dispersal and movements during high tide. Marine Biology 143: 859-866. Download article (pdf).
2002
Agnarsson I. 2002. Sharing a web - on the relation of sociality and kleptoparasitism in theridiid spiders (Theridiidae, Araneae). Journal of Arachnology 30: 181-188. Download article (pdf).
Whitehouse M, Agnarsson I, Miyashita T, Smith D, Cangialosi K, Masumoto T, Li D, Henaut Y. 2002. Argyrodes: Phylogeny, sociality and interspecific interactions - a report on the Argyrodes symposium, Badplaas 2001. Journal of Arachnology 30: 238-245. Download article (pdf).
Judson MLI, Agnarsson I. 2002. Arachnological dragons. Bulletin de la Societe Europeenne d'Arachnologie 14: 15-17.
1996-2000
Agnarsson I. 2000. Adansonia is a Baobab tree not a theridiid spider. Journal of Arachnology 28: 351-352. Download article (pdf).
Ingolfsson A, Agnarsson I. 1999. Anonyx sarsi: a major unrecognized scavenger and predator in the intertidal zone. Journal of the Marine Biological Association of the United Kingdom 79: 1127-1128. Download article (pdf).
Agnarsson I. 1998. Icelandic harvestmen and pseudoscorpions. Fjölrit Náttúrufræðistofnunar 35: 36 pages, 19 figures. (Contact author for reprints)
Agnarsson I. 1996. Icelandic spiders. Fjölrit Náttúrufræðistofnunar 31: 175 pages, 169 figures.(Contact author for reprints)
Work in progress
Agnarsson I, Avilés L, Maddison WP. Submitted to Molecular Ecology. Complete separation along matrilines in a social spider metapopulation inferred from hypervariable mitochondrial DNA region
Sobrero R, May-Collado LJ, Agnarsson I, Hernández CE. In revision for Biology Letters. Expensive
brains: ‘brainy’ rodents have higher metabolic rate
Interactive Key
Agnarsson I. 2003a. Interactive Key to the World Genera of Cobweb Spiders (Theridiidae), version 1.0 beta. George Washington University, online at http://www.gwu.edu/~spiders/keys.htm
Abstracts
Huber BA, Agnarsson I. 2004. Handedness in spiders: genital asymmetry in Pholcidae (Metagonia mariguitarensis) and in Theridiidae (gen. nov.) [poster]. Presented at the XVI International Congress of Arachnology, Ghent, Belgium. View abstract.
Agnarsson I. 2003. Social theridiids: phylogenetic patterns, processes, and predictions. Presented at the 2003 Annual Meeting of The American Arachnological Society
Agnarsson I. 2003. A Phylogenetic view of sociality in cobweb spiders (Theridiidae). Newsletter of the American Arachnological Society 66: 2. Presented at the 2002 Annual Meeting of The American Arachnological Society and at PEET IV Conference View abstract.
Ingólfsson A, Agnarsson I. 2002. Mobile animals in the intertidal zone: Dispersal and movements during high tide. Presented at the 37th European Marine Biology Symposium, Iceland.
Agnarsson I, Arnedo MA, Gillespie R, Coddington JA, Hormiga G. 2001. Sharing a web: a phylogenetic view of sociality and kleptoparasitism in cobweb spiders (Araneae, Theridiidae). Presented at the XV International Congress of Arachnology, Baadplas, S. Africa. View abstract.
Arnedo MA, Agnarsson I, Coddington JA, Hormiga G, Gillespie R. 2001. From a comb to a tree: phylogenetic analysis of the comb-footed spiders (Araneae, Theridiidae) based on multiple data sets. Presented at the XV International Congress of Arachnology, Baadplas, S. Africa. View abstract.
Coddington JA, Hormiga G, Agnarsson I, Kuntner M, Miller J. 2001. Spiders in Guyana: Extraordinary diversity in a one hectare plot (Poster). The Biodiversity of Guyana - A Global Perspective for the Future. Georgetown, Guyana.
Agnarsson I. 2000. Towards a Phylogeny of Cobweb Spiders and the Relimitation of the Genus Anelosimus (Araneae, Theridiidae). Presented at the Evolution 2000 meetings in Bloominton and the 2000 Annual Meeting of The American Arachnological Society. View abstract.
Agnarsson I. 2000. Anelosimus and Theridiid systematics: preliminary morphological phylogenetic analyses. Presented at the PEET III Conference. View abstract.
Agnarsson I, Arnedo MA, Gillespie R, Coddington JA. 1999. Theridiid systematics, a preliminary molecular and morphological phylogenetic analysis. (Abstract). Proceedings of 23rd Annual Meeting of the American Arachnological Society, Trinidad & Tobago. View abstract.
Publications
