Coleosoma floridanum Banks, 1900
Description
Male
Dark yellowish brown. Opisthosoma with darker mottlings and scattered white spots dorsally, anterior end surrounded by a hard sclerite narrow dorsally but extending more than halfway along the ventral surface.
Prosoma length: 0.7 mm, prosoma width: 0.5 mm.
Body length male: 1.8-2.2 mmFemale
Prosoma, sternum and legs yellowish brown, prosoma and sternum with narrow dark borders. Opisthosoma oval with spinnerets almost posterior, pale, dorsally with 3 pairs of irregular white patches followed by a median band of white patches.
Prosoma length: 0.8 mm, prosoma width: 0.6 mm.
Body length female: 1.7-2.1 mmAdditional information
In the wild, but also in buildings.
This species of American origin is not native to Europe (alien species). It had been introduced to Europe at least once and did establish.
Distribution
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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Figures
Pedipalp, ventral view
(Saaristo 1978)
Pedipalp, ventral view
(Saaristo 1978)
Pedipalp, ventral view
(Saaristo 1978)
Pedipalp, retrolateral view
(Baert et al. 2023)
Pedicel, ventral view
(Baert et al. 2023)
Pedipalp, ventral view
(Emerit & Ledoux 2008)
Epigyne, ventral view
(Saaristo 1978)
Epigyne, ventral view
(Emerit & Ledoux 2008)
Epigyne/vulva
(Pfliegler 2014)
Epigyne
(Baert et al. 2023)
Vulva, dorsal view
(Saaristo 1978)
Sternum
(Saaristo 1978)
Habitus, lateral view
(Saaristo 1978)
Distribution List
"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.
References
Baert L, Maelfait J-P, Desender K, Hendrickx F, Dekoninck W, Berthet M, Bouckaert K, Caudron J, Leclercq M (2023) Updated checklist, origin, distribution, literature and genital drawings of the spiders of the Galápagos Islands Belgian Journal of Entomology 142: 1-188 
Blick T, Finch O-D, Harms K H, Kiechle J, Kielhorn K-H , Kreuels M, Malten A, Martin D, Muster C, Nährig D, Platen R, Rödel I, Scheidler M, Staudt A, Stumpf H, Tolke D (2016) Rote Liste und Gesamtartenliste der Spinnen (Arachnida: Araneae) Deutschlands. 3. Fassung, Stand April 2008, einzelne Änderungen und Nachträge bis August 2015. Naturschutz und Biologische Vielfalt 70/4: 383-510
Bosmans R, Van Keer K (2017) Een herziene soortenlijst van de Belgische spinnen (Araneae). Nieuwsbrief van de Belgische Arachnologische Vereniging 32: 39-69
Emerit M, Ledoux J-C (2008) Arrivée en France de Coleosoma floridanum Banks. Revue Arachnologique 17: 53-55
Gubin A I (2025) Coleosoma floridanum Banks, 1900 (Araneae: Theridiidae) – a new alien spider for the south of the European part of Russia. Industrial Botany 25: 56-62
Hänggi A (2003) Nachträge zum "Katalog der schweizerischen Spinnen" - 3. Neunachweise von 1999 bis 2002 und Nachweise synanthroper Spinnen Arachnologische Mitteilungen 26: 36-54
Helsdingen P J van (2025a) Catalogus van de Nederlandse spinnen. Versie 2025.1. 249 pp.
Koponen S, Fritzén N R, Pajunen T (2016) Checklist of spiders in Finland (Araneae). 6th version, December 2016, online at http://biolcoll.utu.fi/arach/checklist_of_spiders_in_Finland.htm
Lavery A (2019) A revised checklist of the spiders of Great Britain and Ireland. Arachnology 18: 196-212
Le Peru B (2007) Catalogue et répartition des araignées de France. Revue Arachnologique 16: 1-468
Lissner J, Scharff N (2019) Danish Spiders. Formerly online at http://www.danmarks-edderkopper.dk
Pfliegler W P (2014) Records of some rare and interesting spider (Araneae) species from anthropogenic habitats in Debrecen, Hungary. e-Acta Naturalia Pannonica 7: 143-156
Plakkhina E V, Esyunin S L (2022) New data on introduced spider species (Arachnida: Aranei) from the Urals. Arthropoda Selecta 31: 363-371
Řezáč M, Růžička V, Hula V, Dolanský J, Machač O, Roušar A (2021) Spiders newly observed in Czechia in recent years – overlooked or invasive species? BioInvasions Records 10: 555-566
Růžička V, Řezáč M (2022a) Seznam pavouků České republiky. List of spiders of the Czech Republic. Online at https://www.arachnology.cz/seznam-pavouku-cr-26.html and https://www.arachnology.cz/en/seznam-pavouku-cr-26.html
Saaristo M I (1978) Spiders (Arachnida, Araneae) from the Seychelles Islands, with notes on taxonomy. Annales Zoologici Fennici 15: 99-126
Sestáková A, Christophoryova J, Korenko S (2013) A tropical invader, Coleosoma floridanum, spotted for the first time in Slovakia and the Czech Republic (Araneae, Theridiidae). Arachnologische Mitteilungen 45: 40-44
Szymkowiak P, Konecka E, Rutkowski T, Pecyna A, Szwajkowski P (2025) Alien spiders in a palm house with the first report of parthenogenetic Triaeris stenaspis (Araneae: Oonopidae) infected by Wolbachia from new supergroup X. Scientific Reports 15(9512): 1-13
Thaler K (2000) Fragmenta faunistica Tirolensia - XIII (Arachnida: Araneae; Myriapoda: Diplopoda; Insecta, Diptera: Mycetophiloidea, Psychodidae, Trichoceridae). Berichte des Naturwissenschaftlich-Medizinischen Vereins in Innsbruck 87: 243-256
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2
Zamani A, Koponen S (2025) First Nordic record of Pandava laminata (Araneae: Titanoecidae), with a synopsis of anthropochorous species of spiders in Finland. Arachnologische Mitteilungen 69: 5-9
Updates
| 02-10-2025 | Distribution insert | Detail |
| 30-05-2025 | Distribution update | Detail |
| 29-03-2025 | Distribution update | Detail |
| 22-03-2025 | Distribution insert | Detail |
| 24-01-2025 | Image insert | |
| 01-03-2023 | Distribution insert | Detail |
| 28-09-2022 | Distribution insert | Detail |
| 07-03-2022 | Distribution update | Detail |
| 05-08-2021 | Distribution update | Detail |
| 19-01-2021 | Distribution update | Detail |
| 01-05-2020 | Datasheet update | Detail |
| 24-01-2017 | Distribution update | Detail |
| 12-08-2014 | Image insert | |
| 29-07-2014 | Distribution update | Detail |
| 10-06-2014 | Image insert |