Details about the record of ajuvenile mermithid roundworm parasitizing the bark spiderCaerostris sumatrana Strand,1915 from Thailand are presented.The morphology and ecology of both organisms is discussed. Morphological features suggest this juvenile nematode belongs to the genus cf.- Aranimermis. Due to the sub adult stage of parasite, identification to species-level was not possible. This first report of a nematode infection in C. sumatrana with several recent findings from other studies significantly adds to the current inventory of mermithids parasitizng spiders. Moreover, our finding is among the first record of this host-parasite interaction from Southeast Asia.

Department of Botany and Zoology Faculty of Science Masaryk University Kotlářská 2 Brno 61137 Czech Republic

Department of Forest Protection and Wildlife Management Faculty of Forestry and Wood Technology Mendel University in Brno Zemědělská 3 Brno 61300 Czech Republic

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Ahtiainen J.J., Alatalo R.V., Kortet R., Rantala M.J.. Sexual advertisement and immunen function in arachnid species (Lycosidae) Behav. Ecol. 2004;15:602–606. doi: 10.1093/beheco/arh062. doi: 10.1636/0161-8202(2003)031. Allard, C., Robertson, M.W. (2003): Nematode and dipteran endoparasites of the wolf spider Pardosa milvina (Araneae, Lycosidae). J. Arachnol. 31: 139𠌓141. DOI

Finch O.D.. The parasitoid complex and parasitoid-induced mortality of spiders (Araneae) in a Central European woodland. J. Natur. Hist. 2005;39:2339–2354. doi: 10.1080/00222930502005720Holm. Å. (1941): Über Gynandromorphismus und Intersexualität bei den Spinnen [Notes on gynandromorphism and intersexuality in spiders]. Zool. Bidr. Uppsala 20: 397–414. DOI

Iida H., Hasegawa H.. First record of a mermithid nematode emerging from the wolf spider Pardosa pseudoannulata (Araneae: Lycosidae) Acta Arachnol. 2003;52:77–78. doi: 10.2476/asjaa.52.77. doi: 10.2476/asjaa.58.27. Jäger, P., Praxaysombath, B. (2009): Spiders of Laos: New species and new records (Arachnida: Araneae). Acta Arachnol. 58: 27–51. DOI

Jäger P., Praxaysombath B.. Spiders from Laos with forty-three new records and first results from the province Bolikhamsay and Champasak (Arachnidae: Araneae) Acta Arachnol. 2011;60:9–31. 10.2476asjaa.60.9.

Jitklang S., Ahantarig A., Kuvangkadilok C., Baimai V., Adler P.H.. Parasites of larval black flies (Diptera: Simuliidae) in Thailand. Songklanakarin J. Sci. Technol. 2012;2:153–212. doi: 10.2307/3227000. 34: 6. Leech, R.E. (1966): The spiders (Araneida) of Hazen Camp. Quaest. Entomol. DOI

Matsuda M.. Two intersexual spiders of the family Lycosidae from Japan. Bull. Higashi Taisetsu Mus. Natur. Hist. 1999;21:5–54. In Japanese.

Marc P., Canard A., Ysnel F.. Spiders (Araneae) useful for pest limitation and bioindication. Agric. Ecosyst. Environ. 1999;74:229–273. doi: 10.1016/S0167-8809(99)00038-9. DOI

Meyer M.. New record of a parasitoid worm (Mermithidae, Nematoda) in a spider of the genus Trochosa (Lycosidae) Arachnol. Mitt. 2014;48:13–15. doi: 10.5431/aramit4803. DOI

Michalko R., Pekár S.. The biocontrol potential of Philodromus (Araneae, Philodromidae) spiders for the suppression of pome fruit orchard pests. Biol. Control. 2015;82:13–20. doi: 10.1016/j.biocontrol2014.12.001. DOI

Michalko R., Pekár S., Entling M.H.. An updated perspective on spiders as generalist predators in biological control. Oecologia. 2019;189:21–36. doi: 10.1007/s00442-018-4313-1. PubMed DOI

Murphy P.G., Lugo A.E.. Ecology of tropical dry forest. Annu. Rev. Entomol. 1986;17:67–88. doi: 10.1146/annurev.es.17.110186.000435. DOI

Murphy F., Murphy J. An introduction to the spiders of South East Asia. Malaysia: Malaysian Nature Society; 2000. p. 624.

Nickle W.R.. A Contribution to our Knowledge of the Mermithidae (Nematoda) J. Nematol. 1972;4:113–146. PubMed PMC

Nikdel M., Kaiser H., Niknam G.. First record Of Hexamermis cf. albicans (Siebold, 1848) (Nematoda: Mermithidae) infecting Lepidopteran larvae from Iran. Nematol. Mediterr. 2011;39:81–83. Okochi, T. (1969) Reports on parasites of spiders. Kishidaia 9: 2–5 In Japanese.

Penney D., Bennett S.P.. First Unequivocal Mermithid – Linyphiid (Araneae) Parasite – Host Association. J. Arachnol. 2006;34:273–278. doi: 10.1636/S04-92.1. DOI

Pizzi R.. Parasites of tarantulas (Theraphosidae) J. Exot. Pet Med. 2009;18:283–288. doi: 10.1053/j.jepm.2009.09.006. DOI

Poinar G.O., Welch H.E. Slusarski W. Review of Advances in Parasitology. Warsaw: Polish Scientific Publications; 1981. Parasites of invertebrates in the terrestrial environment; pp. 947–954. Poinar, G.O. (1983): The natural history of Nematodes Englewood Cliffs: Prentice Hall.

Poinar G.O.. Mermithid (Nematoda) parasites of spiders and harvestmen. J. Arachnol. 1985;13:121–128.

Poinar G.O., Chang P.M.. Hexamermis cathetospiculae n.sp. (Mermithidae, Nematoda), a parasite of the rice stemborer, Tryporyza incertulas (Wlk.) (Pyralidae; Lepidoptera) in Malaysia. J. Nematol. 1985;17:360–363. PubMed PMC

Poinar G.O., Benton C.L.B.. Aranimermis aptispicula n.g., n.sp. (Mermithidae: Nematoda), a parasite of spiders. Syst. Parasitol. 1986;8:33–38. doi: 10.1007/BF00010307. DOI

Poinar G.O. Nematode Parasites of Spiders. Ecophysiology of Spiders. 1987. pp. 299–308. In. pp.

Poinar G.O., Early J.W.. Aranimermis giganteus n. sp. (Mermithidae: Nematoda), a parasite of New Zealand mygalomorph spiders (Araneae: Arachnida). Rev. Nematol. 1990;13:403–410.

Poinar G.O.. Heydenius araneus n.sp (Nematoda: Mermithidae), a parasite of a fossil spider, with an examination of helminths from extant spiders (Arachnida: Araneae) Invertebr. Biol. 2000;119:388–393. doi: 10.1111/j.1744-7410.2000.tb00108.x. doi: 10.1163/156854111X612199. Poinar, G.O. (2012): New fossil nematodes in Dominican and Baltic amber. Nematology 14, 483–488. DOI

Ranade S., Prakash V.. Parasitization of a huntsman spider (Arachnida: Araneae: Sparassidae: Heteropoda venatoria by a mermithid nematode (Nematoda: Mermithidae) J. Threat. Taxa. 2016;8:9595–9596. doi: 10.11609/jott.3105.8.13.9595-9596. DOI

Rodrigues T., Álvares É.S.S., Machado É.O., Maria M.. New records of the family Mermithidae (Nematoda) as parasitoids of spiders (Arachnida: Araneae) in Brazil and Peru. Rev. Iber. Aracnol. 2005;12:119–120.

Schmidt M.H., Clough Y., Schulz W., Westphalen W., Tscharntke T.. Capture efficiency and preservation attributes of different fluids in pitfall traps. J. Arachnol. 2006;34:159–169. doi: 10.1636/T04-95.1. DOI

Takasuka K., Korenko S., Kysilková K., Štefánik M., Černecká L., Mihál I., Dolejš P., Holý K.. Host utilization of koinobiont spider-ectoparasitoids (Ichneumonidae, Ephialtini, Polysphincta genus-group) associated with Cyclosa spp. (Araneae, Araneidae) across the Palaearctic. Zool. Anz. 2017;267:8–14. doi: 10.1016/j.jcz.2017.01.001. DOI

Vythilingam I., Sidavong B., Chan S.T., Phonemixay T., Phompida S., Krishnasamy M.. First report of mermithid parasitism (Nematoda: Mermithidae) in mosquitoes (Diptera: Culicidae) from Lao PDR. Trop. Biomed. 2005;22:77–79. doi: 10.1186/1756-3305-5-131. PubMed DOI

Wongprom P., Košulič O.. First data on spiders (Arachnida: Araneae) from dry dipterocarp forests of Thailand. Check List. 2016;12:1–13. doi: 10.1007/s10841-007-9116-3. DOI

Zamani A.. First report of a mermithid nematode (Enoplea: Mermithida) parasitizing the crab spider Heriaeus spinipalpus (Araneae: Thomisidae) Acta Arachnol. 2014;63:63–64. doi: 10.2476/asjaa.63.63. DOI