Fissidens celticus
Scientific classification Edit this classification
Kingdom: Plantae
Division: Bryophyta
Class: Bryopsida
Subclass: Dicranidae
Order: Dicranales
Family: Fissidentaceae
Genus: Fissidens
Species:
F. celticus
Binomial name
Fissidens celticus
Paton, 1965

Fissidens celticus, also known by its common name Welsh pocket-moss, is a species of moss in the family Fissidentaceae. It was discovered in 1958 in Pembrokeshire by A.H. Norkett and was first described as a new species by Jean Paton in 1965.[3]

Description

Fissidens celticus has shoots up to 4.5 millimetres (0.18 in) tall and 1–1.5 millimetres (0.039–0.059 in) wide.[4] Each shoot has many leaves, often 10 pairs or more, of equal size.[4] The nerve in each leaf runs all the way to the leaf tip and has a distinct bend about halfway along the leaf.[4] Male plants and capsules are not known,[5] and it is uncertain how the species disperses.[6]

Fissidens celticus can be distinguished from F. exilis by its longer shoots, its greater number of leaves and its lack of capsules.[4]

Habitat

Fissidens celticus grows on shaded soil banks near woodland streams, especially on bare, compact patches eroded by floodwater.[4] It has an altitude range of between 5 and 300 metres (16.4 and 984 feet).[3]

Distribution

Fissidens celticus is generally believed to be widespread and common within suitable localities. It is apparently endemic to western Europe and there is no evidence of population decline.[1]

Within the United Kingdom

The species holotype was from Hustyn Wood, St Breock, Cornwall,[6] and it is common throughout the western parts of the United Kingdom.[3] In the United Kingdom, F. celticus often associates with Calypogeia arguta,[3] Diplophyllum albicans,[3] Dicranella heteromalla,[6] Dicranella rufescens,[3][7] Epipterygium tozeri,[3] F. bryoides,[3] Pellia epiphylla,[3] Pohlia lutescens,[3] and Pseudotaxiphyllum elegans.[3]

England

Fissidens celticus is most commonly found in South West England, but is also present in the south east and north west.[3]

There are records of F. celticus from Cornwall,[6] Devon,[8] Gloucestershire,[9] Kent,[10] and Sussex.[11] On the Isle of Wight, it is present in Parkhurst Forest,[12] and at Briddlesford Nature Reserve.[13] As of 2001, the only known record in Lancashire was on the River Lune Biological Heritage Site.[14]

Wales

The species can be found all across western Wales,[3][15] including on Anglesey.[16]

Scotland

Fissidens celticus is present in much of western Scotland.[3] The Tayvallich Juniper and Fen SSSI (near Tayvallich, Argyll and Bute) is noted for its oceanic bryophytes, including F. celticus.[17]

Northern Ireland

In Northern Ireland, the only known location for F. celticus is in Ness Wood ASSI in County Londonderry.[18]

Elsewhere

Fissidens celticus has been recorded in many other countries in Europe:

In 2019, it was first reported in Turkey (and therefore in Asia).[22] It was found in Bozyazı, Mersin Province, associating with Bartramia stricta, Bryum dichotomum, Didymodon tophaceus, Targionia hypophylla and Timmiella barbuloides.[22]

References

  1. 1 2 N. Hodgetts (2019). "Fissidens celticus, Welsh Pocket-moss". IUCN Red List. Retrieved 20 November 2022.
  2. ↑ Des A. Callaghan (2023). "A new IUCN Red List of the bryophytes of Britain, 2023". Journal of Bryology. 44 (4): 271–389. doi:10.1080/03736687.2023.2185393.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 "Fissidens celticus" (PDF). British Bryological Society. Retrieved 21 November 2022.
  4. 1 2 3 4 5 "Fissidens celticus – Welsh Pocket-moss" (PDF). British Bryological Society. Retrieved 20 November 2022.
  5. 1 2 H. Köckinger; I. Berney; N. Schnyder (2020). "Fissidens celticus Paton" (PDF). University of Zurich (in German). doi:10.5167/uzh-189586. Retrieved 20 November 2022.
  6. 1 2 3 4 David T. Holyoak. "Fissidens celticus Paton 12". THE BRYOPHYTES OF CORNWALL AND THE ISLES OF SCILLY. Retrieved 21 November 2022.
  7. ↑ "Dicranella rufescens" (PDF). British Bryological Society. Retrieved 21 November 2022.
  8. ↑ Mark Pool. "BBS Spring meeting 2019: North Devon, 11–16 April" (PDF). British Bryological Society. Retrieved 21 November 2022.
  9. ↑ "Vice-county 34 (West Gloucestershire)". British Bryological Society. Retrieved 21 November 2022.
  10. ↑ Kent Biodiversity Action Plan Steering Group (1997). "Kent Biodiversity Action Plan" (PDF). Medway Council. Retrieved 21 November 2022.
  11. ↑ Sussex Biodiversity Record Centre (13 February 2014). "Desktop Biodiversity Report Land at Balcombe Parish ESD/14/747" (PDF). Balcombe Parish Council. Retrieved 21 November 2022.
  12. ↑ "Isle of Wight (VC10)". Hampshire and Isle of Wight Bryophytes. Retrieved 21 November 2022.
  13. ↑ "Flora News" (PDF). Hampshire and Isle of Wight Wildlife Trust. Spring 2004. Retrieved 21 November 2022.
  14. ↑ "Appendix 3 – Biological Heritage Sites" (PDF). Lancaster City Council. Retrieved 21 November 2022.
  15. ↑ "Distribution Map – Fissidens celticus (Welsh Pocket-moss)". LERC Wales. Retrieved 21 November 2022.
  16. ↑ "Anglesey: Cadnant Dingle". Countryside Council for Wales. Retrieved 21 November 2022.
  17. ↑ "TAYVALLICH JUNIPER AND FEN SITE OF SPECIAL SCIENTIFIC INTEREST". NatureScot. Retrieved 21 November 2022.
  18. ↑ "Ness Wood ASSI". Department of Agriculture, Environment and Rural Affairs. 9 June 2015. Retrieved 21 November 2022.
  19. ↑ Peter Tautz; Klaus Weddeling (2003). "Nachweis von Fissidens celticus J. Paton im Waldgebiet Leuscheid östlich Eitorf (NRW, Süderbergland)" (PDF). Decheniana. 156: 257–259. Retrieved 21 November 2022.
  20. ↑ E.R.B. Little (January 1967). "Fissidens celticus Paton, New to Ireland". Irish Naturalists' Journal. 15 (9): 271. Retrieved 20 November 2022.
  21. ↑ Juan Guerra; Patxi Heras; Marta Infante (2012). "Fissidens bryoides var. gymnandrus and F. celticus (Bryophyta, Fissidentaceae) in the Iberian Peninsula". Cryptogamie, Bryologie. 33 (2): 149–154. doi:10.7872/cryb.v33.iss2.2012.149.
  22. 1 2 L. T. Ellis; O. M. Afonina; I. V. Czernyadjeva; L. A. Konoreva; A. D. Potemkin; V. M. Kotkova; M. Alataş; H. H. Blom; M. Boiko; R. A. Cabral; S. Jimenez; D. Dagnino; C. Turcato; L. Minuto; P. Erzberger; T. Ezer; O. V. Galanina; N. Hodgetts; M. S. Ignatov; E. A. Ignatova; S. G. Kazanovsky; T. Kiebacher; H. Köckinger; E. O. Korolkova; J. Larraín; A. I. Maksimov; D. Maity; A. Martins; M. Sim-Sim; F. Monteiro; L. Catarino; R. Medina; M. Nobis; A. Nowak; R. Ochyra; I. Parnikoza; V. Ivanets; V. Plášek; M. Philippe; P. Saha; Md. N. Aziz; A. V. Shkurko; S. Ştefănuţ; G. M. Suárez; A. Uygur; K. Erkul; M. Wierzgoń; A. Graulich (2020). "New national and regional bryophyte records, 63". Journal of Bryology. 42 (3): 281–296. doi:10.1080/03736687.2020.1750930. hdl:10451/45225.
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