Myrmecium colombianum (Poinar, 2024) n. comb.—the second known fossilized castianeirine spider, illustration of a further specimen of Myrmecium in Colombian copal and notes on transformational ant mimicry and evolution of the genus

References

1. Antwiki (2024) Dominican Amber. Available from: https://www.antwiki.org/wiki/Dominican_Amber (accessed 7 April 2024)
2. Blaimer, B.B. (2012) Acrobat ants go global—origin, evolution and systematics of the genus Crematogaster (Hymenoptera: Formicidae). Molecular Phylogenetics and Evolution, 65, 421–436. https://doi.org/10.1088/1475-7516/2012/06/028
3. Candiani, D.F. & Bonaldo, A.B. (2017) The superficial ant: a revision of the Neotropical ant-mimicking spider genus Myrmecium Latreille, 1824 (Araneae, Corinnidae, Castianeirinae). Zootaxa, 4230 (1), 1–95. https://doi.org/10.11646/zootaxa.4230.1.1
4. Cushing, P.E. (1997) Myrmecomorphy and myrmecophily in spiders: a review. Florida Entomologist, 80, 165–193. https://doi.org/10.2307/3495552
5. Cushing, P.E. (2012) Spider-Ant Associations: An Updated Review of Myrmecomorphy, Myrmecophily, and Myrmecophagy in Spiders. Psyche: A Journal of Entomology, Article ID: 151989. [published online] https://doi.org/10.1155/2012/151989
6. Delclòs, X., Peñalver, E., Ranaivosoa, V. & Solórzano-Kraemer, M.M. (2020) Unravelling the mystery of the “Madagascar copal’: Age, origin and preservation of a recent resin. PLoS ONE, 15 (5), e0232623. https://doi.org/10.1371/journal.pone.0232623
7. DuBois, M.B. & LaPolla, J.S. (1999) A preliminary review of Colombian ants (Hymenoptera: Formicidae) preserved in copal. Entomological News, 110, 162–172.
8. Dunlop, J.A., Penney, D. & Jekel, D. (2020) A summary list of fossil spiders and their relatives. In: World Spider Catalog. Version 20.5. Natural History Museum Bern. Available from: http://wsc.nmbe.ch (accessed 8 April 2024)
9. Edmunds, M. (1978) On the association between Myrmarachne spp. (Salticidae) and ants. Bulletin of the British Archaeological Society, 4 (4), 149–160.
10. FossilEra (2024) 2.05" Polished Colombian Copal (5.5 g) with Ant-Mimic Spider! Available from: https://www.fossilera.com/fossils/2-05-polished-colombian-copal-5-5-g-with-ant-mimic-spider (accessed 8 April 2024)
11. Grimaldi, D.A. & Engel, M.S. (2005) Evolution of the Insects. Cambridge University Press, Cambridge, 755 pp.
12. Komárek, S. (1998) Mimicry, Aposematism and Related Phenomena in Animals and Plants: A Bibliography 1800–1990. Vesmir, Prague, 296 pp.
13. Luo, C., Beutel, R.G., Engel, M.S., Liang, K., Li, L., Li, J., Xu, C., Vršanský, P., Jarzembowski, E.A. & Wang, B. (2022) Life history and evolution of the enigmatic Cretaceous–Eocene Alienopteridae: A critical review. Earth-Science Reviews, 225, 103914. https://doi.org/10.1016/j.earscirev.2021.103914
14. Mathew, A.P. (1934) The life-history of the spider (Myrmarachne plataleoides) (Cambr). Journal of the Bombay Natural History Society, 37, 369–374.
15. Modi, A., Vergata, C., Zilli, C., Vischioni, C., Vai, S., Malagoli, G., Lari, M., Caramelli, D. & Taccioli, C. (2021) Successful extraction of insect DNA from recent copal inclusions: limits and perspectives. Scientific Reports, 11, 6851. https://doi.org/10.1038/s41598-021-86058-9
16. Oliveira, P.S. (1988) Ant-mimicry in some Brazilian salticid and clubionid spiders (Araneae: Salticidae, Clubionidae). Biological Journal of the Linnean Society, 33, 1–15. https://doi.org/10.1111/j.1095-8312.1988.tb00443.x
17. Pekár, S. (2014) Is inaccurate mimicry ancestral to accurate in myrmecomorphic spiders (Araneae)? Biological Journal of the Linnean Society, 113, 97–111. https://doi.org/10.1111/bij.12287
18. Pekár, S. (2022) New drivers of the evolution of mimetic accuracy in Batesian ant-mimics: size, habitat and latitude. Journal of Biogeography, 49 (1), 14–21. https://doi.org/10.1111/jbi.14283
19. Penney, D., Wadsworth, C., Fox, G., Kennedy, S.L., Preziosi, R.F. & Brown, T.A. (2013) Absence of Ancient DNA in Sub-Fossil insect inclusions preserved in ‘Anthropocene’ Colombian Copal. PLoS ONE, 8 (9), e73150. https://doi.org/10.1371/journal.pone.0073150
20. Perger, R. & Rubio, G.D. (2020a) Contributions to the knowledge of Neotropical ant-like spiders: Myrmecotypus tahyinandu sp. n. from Bolivian Chiquitano forest, a new country record for M. niger, and indirect evidence for species-specific mimicry (Araneae: Corinnidae: Castianeirinae). Zootaxa, 4790 (1), 151–164. https://doi.org/10.11646/zootaxa.4790.1.9
21. Perger, R. & Rubio, G.D. (2020b) Sympolymnia, a new genus of Neotropical ant-like spider, with description of two new species and indirect evidence for transformational mimicry (Araneae, Salticidae, Simonellini). Zoosystematics and Evolution, 96 (2), 781–795. https://doi.org/10.3897/zse.96.55210
22. Perger, R. & Rubio, G.D. (2021) A new species of Myrmecotypus Pickard-Cambridge spider (Araneae: Corinnidae: Castianeirinae) from the Bolivian orocline, imitating one of the world’s most aggressive ants. Insecta Mundi, 0860, 1–8.
23. Perger, R., Rubio, G.D. & Baigorria, J.E. (2024) And the Oscar goes to… – species-specific ant behavior related to predator defense in ant-mimicking spiders. Austral Ecology. [in press]
24. Perger, R., Rubio, G.D. & Haddad, C.R. (2021) On ant-like Synemosyna Hentz, 1846 spiders from Bolivia, with indirect evidence for polymorphic mimicry complexes (Araneae: Salticidae: Simonellini). European Journal of Taxonomy, 748, 67–88. https://doi.org/10.5852/ejt.2021.748.1343
25. Poinar, G.O. & Poinar, R. (1999) The Amber Forest: A Reconstruction of a Vanished World. Princeton University Press, New Jersey, Princeton, 239 pp.
26. Poinar G.O. (2024) Myrmarachne colombiana sp. n. (Araneae: Salticidae), a new species of ant-mimic spider in copal from Colombia, South America. Historical Biology. [in press] https://doi.org/10.1080/08912963.2024.2320190
27. Prószyński, J. (2016) Delimitation and description of 19 new genera, a subgenus and a species of Salticidae (Araneae) of the world. Ecologica Montenegrina, 7, 4–32. https://doi.org/10.37828/em.2016.7.1
28. Ramírez, M. (2014) The morphology and phylogeny of Dionychan spiders (Araneae: Araneomorphae). Bulletin of the American Museum of Natural History, 390, 1–374. https://doi.org/10.1206/821.1
29. Reiskind, J. (1969) The spider subfamily Castianeirinae of North and Central America (Araneae, Clubionidae). Bulletin of the Museum of Comparative Zoology, 138 (5), 163–325.
30. Richman, D.B., Edwards, G.B. & Cutler, B. (2005) Salticidae. In: Ubick, D., Paquin, P., Cushing, P.E. & Roth, V. (Eds.), Spiders of North America: An identification manual. American Arachnological Society, Stockton, California, pp. 205–216.
31. Ruxton, G.D., Sherratt, T.N. & Speed, M.P. (2004) Avoiding Attack: the Evolutionary Ecology of Crypsis, Warning Signals, and Mimicry. Oxford University Press, Oxford, 240 pp. https://doi.org/10.1093/acprof:oso/9780198528609.001.0001
32. Seyfullah, L.J., Beimforde, C., Dal Corso, J., Perrichot, V., Rikkinen, J., Schmidt, A.R. (2018) Production and preservation of resins—past and present. Biological Reviews, 93, 1684–1714. https://doi.org/10.1111/brv.12414
33. Sherry, T.W., Kent, C.M., Saìnchez, N.V. & Şekercioğlu, Ç.H. (2020) Insectivorous Birds in the Neotropics: ecological radiations, specialization, and coexistence in species rich communities. Auk: Ornithological Advances, 137, 1–27. https://doi.org/10.1093/auk/ukaa049
34. Solórzano Kraemer, M.M., Kraemer, A.S., Stebner, F., Bickel, D.J. & Rust, J. (2015) Entrapment bias of arthropods in Miocene amber revealed by trapping experiments in a tropical forest in Chiapas, Mexico. PLoS One, 10 (3), e0118820. https://doi.org/10.1371/journal.pone.0118820
35. Wanless, F.R. (1978) A revision of the spider genera Belippo and Myrmarachne (Araneae: Salticidae) in the Ethiopian region. Bulletin of the British Museum of Natural History, Zoology, 33 (1), 1–139. https://doi.org/10.5962/p.28732
36. World Spider Catalog (2024) World Spider Catalog. Version 25.0 Natural History Museum Bern, Bern. Available from: http://wsc.nmbe.ch (accessed 5 April 2024)
37. Wunderlich, J. (1988) The fossil Spiders in Dominican amber. Die fossilen Spinnen im Dominikanischen Bernstein. Beiträge zur Araneologie, 2, 1–378.
38. Wunderlich, J. (2004) Family Corinnidae (Corinnids). In: Wunderlich, J. (Ed.), Fossil Spiders in Amber and Copal. Beiträge zur Araneologie, 3, pp. 476–484.
39. Veselý, P., Dobrovodský, J. & Fuchs, R. (2021) Predation by avian predators may have Initiated the evolution of myrmecomorph spiders. Scientific Reports, 11 (1), 17266. https://doi.org/10.1038/s41598-021-96737-2