Enchylium conglomeratum

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Enchylium conglomeratum

Secure  (NatureServe)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Peltigerales
Family: Collemataceae
Genus: Enchylium
Species:
E. conglomeratum
Binomial name
Enchylium conglomeratum
(Hoffm.) Otálora,
P.M. Jørg.
& Wedin (2013)
Synonyms[2][3]

Enchylium conglomeratum, commonly known as dotted jelly lichen, is a

Holarctic region, occurring in both North America and Europe
.

Enchylium conglomeratum thrives in relatively

calcareous rocks. Its thallus structure is characterized by diminutive, cushion-like formations with flattened lobes, lacking a proper cortex
.

Reproductively, Enchylium conglomeratum exhibits

Extinct (Ex) by the British Lichen Society to Regionally Extinct (RE) in Switzerland
.

Taxonomically, Enchylium conglomeratum underwent a

revision in 2013, leading to its transfer from the genus Collema to Enchylium
. Synonyms include Collema pycnocarpum and Synechoblastus conglomeratus.

Taxonomy

Enchylium conglomeratum was originally described as Collema conglomeratum by Hoffm. in 1795 and was subsequently published in the 1796 publication "Deutschl. Fl., Zweiter Theil," with the typification based on specimens collected anonymously and illustrated by Dillenius.[4]

C. conglomeratum underwent taxonomic revision becoming Enchylium conglomeratum, as it was formally transferred to the genus Enchylium by Otálora, P.M. Jørg. & Wedin in 2013.[note 2] Belonging to the family Collemataceae within the phylum Ascomycota, this species is classified under the class Lecanoromycetes and the order Peltigerales.[6][7]

Synonymy

Enchylium conglomeratum, formerly identified under various synonyms, has undergone taxonomic revisions over time, resulting in a list of historical names used in scientific literature. These synonyms include Biatora vernalis f. conglomerata, Collema aggregatum var. conglomeratum, Collema fasciculare var. conglomeratum, among others.[3]

Description

Thallus

The

pruina and varying from smooth to rarely warty, without isidia present. The lower side is generally paler in hue and bears scattered white rhizines. Neither an upper nor lower cortex is typically developed.[8][6]

Examination of the lichen's thallus structure under a light microscope reveals, unlike the thallus of the closely related species Leptogium digitatum, the thallus of E. conglomeratum lacks a proper cortex.[2]

Additionally, the thallus of E. conglomeratum is noted to not be paraplectenchymatous (a cell arrangement where the hyphae are oriented in all directions) throughout, in contrast to the fully paraplectenchymatous thallus structure seen in the micrograph of a related jelly lichen Blennothallia crispa.[2]

Apothecia

The

apothecia of Enchylium conglomeratum are common and lecanorine in structure, frequently clustered along the lobe margins or at lobe tips, often obscuring the underlying thallus. The apothecia are sessile and constricted at their base, ranging in size from 0.5 to 1.5 (-2) millimeters across. They possess a disc that varies from flat to convex in shape, exhibiting a dark reddish-brown coloration. Surrounding the disc is a rather thick, unbroken thalline margin with a smooth, even surface.[8][6]

The thalline excipular layer of E. conglomeratum lacks a cortex, while the proper exciple exhibits a euthyplectenchymatous (elongated) construction, reaching up to 20 micrometers in lateral thickness. The epithecium

ascospores are 1(-3)-septate,[11] hyaline, narrowly fusiform with acute apices, measuring (10-)15-24(-26) x 3–4.5(-5.5) micrometers.[8][6][12]

Pycnidia

photobiont is a cyanobacterium, likely Nostoc with cells arranged in elongated chains.[8][6]

Chemistry

All spot tests performed on samples of Enchylium conglomeratum yielded negative results, indicating the lichen did not exhibit any characteristic color changes when exposed to standard chemical reagents used in lichen identification. Furthermore, no lichen substances or specialized compounds were detected through chemical analysis.[8][6]

Collema conglomeratum var. conglomeratum Hoffm. sample collected in 2010 by ASU Lichen Herbarium

E. conglomeratum can grow on substrates with a

solar irradiation, the lichen is adapted to habitats with moderate to high light levels, with a tolerance range of 3–5 on the provided scale,[6] avoiding extreme direct solar exposure.[14]

Additionally, E. conglomeratum demonstrates a moderate level of tolerance to aridity, with a rating of 3 on the 5-point scale,[6] suggesting it is a mesophytic species that can occur in areas with average moisture levels.[15] Regarding eutrophication, the species can tolerate low to moderate levels of nutrient enrichment,[16] with a tolerance range of 1–3.[6]

E. conglomeratum also exhibits a poleotolerance rating of 1–2,

Carpinus forests), suggesting it can thrive in both lowland and mid-elevation environments.[18]

Distribution and ecology

Historical observations

Known as "conglomerate jelly lichen",

Pinus), and juniper (Juniperus) species. The habitat comprised rhyolite ledges and talus, with elevations ranging from 245 to 335 meters (804 to 1099 feet) above sea level.[22] C. conglomeratum is the first lichen species recorded from Iowa. The species was collected by Bruce Fink in 1880.[23]

In the 20th century, C. conglomeratum was predominantly discovered in Central America, notably situated within the Neotropics. Specimens were observed at altitudes varying between 650 and 850 meters above sea level.[24] Specimens collected from other parts of the United States were found growing on Quercus species, including evergreen oak (Q. hypoleucoides, Q. emoryi) and deciduous oak (Q. arizonica), as well as pine (P. latifolia) forest.[25] C. conglomeratum was identified in other regions, such as Pakistan, where it was observed growing on the bark of Morus serrata.[26]

Enchylium conglomeratum

Enchylium conglomeratum is known to inhabit the bark of trees, making it a

calcareous rocks.[28]

The overall distribution of E. conglomeratum is characterized as fragmented across the

Holarctic region, spanning both North America and Europe.[6][8]

Within the Sonoran biogeographic province of North America, E. conglomeratum has been documented in central and southern Arizona, as well as the Mexican states of

Newfoundland, Ontario, and Quebec.[1]

Across the

Holarctic distribution.[6]

Despite its broad but disjunct range, E. conglomeratum is considered a rare lichen in many parts of its distribution. The specific threats to this species and its overall conservation status remain largely unknown. Historically, the lichen appears to have been more widespread, but it is now frequently restricted to the vicinity of small mountain valley settlements, where local populations can be relatively abundant.[6]

Commoners-rarity

In the

Dry mediterranean belt.[6]

Conservation status

Global status

According to NatureServe, the global conservation status of Enchylium conglomeratum is ranked as G5?, indicating the species is secure globally, but with some uncertainty. When rounded, the global status becomes G5. The global status was last reviewed by NatureServe on December 8, 2000.[1]

National and subnational statuses

In Canada, Enchylium conglomeratum is ranked as N2N3, indicating it is considered vulnerable to imperiled nationally.[31] At the provincial level, it is ranked as SU (unranked) in Newfoundland, S1 (critically imperiled) in New Brunswick, S2S3 (imperiled to vulnerable) in Ontario, and SNR (unranked) in Quebec.[1]

Within the United States, the overall national ranking of E. conglomeratum by NatureServe is NNR,[1] meaning the status is unranked nationally.[31] At the state level, the species is also ranked as SNR (unranked) in Colorado, Georgia, Indiana, Minnesota, North Carolina, Pennsylvania, and Wyoming.[1] In Iowa, it is ranked as SH,[1] indicating it is possibly extirpated from the state.[31] Kentucky is the only state with a more certain ranking of S3, considered vulnerable.[1]

E. conglomeratum is marked as an "endangered" species in the state of Ohio by the Ohio Department of Natural Resources.[32]

United Kingdom

British Lichen Society, using the

Extinct (Ex) in their most recent assessment as of March 2024.[33]

Switzerland

The conservation status of Enchylium conglomeratum in Switzerland is Regionally Extinct (RE) according to the 2002 Red List of Switzerland.[34] However, despite its apparent disappearance from Switzerland, E. conglomeratum is still recognized as a high priority species for conservation efforts at the national level. The 2019 list of National Priority Species in Switzerland has assigned the lichen a priority ranking of 2 (high priority).[35]

The 2019 national priority assessment also categorizes E. conglomeratum as having a clear need for specific conservation actions, with a Measure-B ranking of 2.[34]

Despite this high conservation priority, Switzerland's level of responsibility for the overall protection of E. conglomeratum is relatively low, ranked as a 1 on the national responsibility scale.[34]

Notes and references

Note

  1. ^ Basionym: Collema conglomeratum Hoffm. - Deutschl. Fl., Zweiter Theil (Erlangen): 102 (1796) ['1795'].
  2. ^ The taxonomic revision took place in 2013 and was subsequently published in Fungal Diversity 64(1): 286 in 2014.[5]
  3. squamulose
    .
  4. ^ The outer layer of the fruiting body in fungi and lichens, equivalent to the hymenium in fungi and forming a film over the hymenium in lichens.[9]
  5. ^ The dense hyphal tissue beneath the hymenium.[10]

References

  1. ^ a b c d e f g h i "Enchylium conglomeratum Dotted Jelly Lichen". NatureServe. Retrieved 2024-03-17.
  2. ^
    doi:10.1007/s13225-013-0266-1
    .
  3. ^ a b "Species Fungorum - Species synonymy". www.speciesfungorum.org. Retrieved 2024-03-23.
  4. ^ a b "Record Details: Collema conglomeratum Hoffm". www.indexfungorum.org. Retrieved 2024-03-23.
  5. ^ "Enchylium conglomeratum". Global Biodiversity Information Facility.
  6. ^ a b c d e f g h i j k l m n o p q Nimis, P.L. (2016). "Enchylium conglomeratum (Hoffm.) Otálora, P.M. Jørg. & Wedin". ITALIC - The Information System on Italian Lichens. Version 7.0. University of Trieste, Dept. of Biology. Retrieved 2024-03-17.
  7. ^ National Atlas of Epiphytic Lichens in Forested Habitats of the United States (usda.gov)
  8. ^ a b c d e f g Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2. | Online excerpt
  9. ^ "epithecium defination". Merriam-Webster.
  10. ^ "hypothecium defination". Merriam-Webster.
  11. doi:10.34885/174
    .
  12. ISBN 978-0-300-19573-6
    .
  13. ^ "pH of the substratum (5 states)". Italic 7.0, a publication of University of Trieste. Retrieved 2024-03-17.
  14. ^ "Solar irradiation (5 states)". Italic 7.0, a publication of University of Trieste. Retrieved 2024-03-17.
  15. ^ "Aridity (5 states)". Italic 7.0, a publication of University of Trieste. Retrieved 2024-03-17.
  16. ^ "Eutrophication (including deposition of dust and nitrogen compounds, 5 states)". Italic 7.0, a publication of University of Trieste. Retrieved 2024-03-17.
  17. ^ "Poleotolerance". Italic 7.0, a publication of University of Trieste. Retrieved 2024-03-17.
  18. ^ "Altitudinal distribution (6 states)". Italic 7.0, a publication of University of Trieste. Retrieved 2024-03-17.
  19. ^ "Classification for Kingdom Fungi Down to Species Collema conglomeratum Hoffm". United States Department of Agriculture. Retrieved 2024-03-23.
  20. ^ "MyCoPortal Detailed Collection Record Information". www.mycoportal.org. Retrieved 2024-03-23.
  21. ^ "MyCoPortal Detailed Collection Record Information". www.mycoportal.org. Retrieved 2024-03-23.
  22. ^ "MyCoPortal Detailed Collection Record Information". www.mycoportal.org. Retrieved 2024-03-23.
  23. ^ Colbert, James (2011). "Current Status of Lichen Diversity in Iowa". Journal of the Iowa Academy of Science. 118 (1–4): 16–23.
  24. ^ "Record Collema conglomeratum Hoffm. | Collections Search Center, Smithsonian Institution". collections.si.edu. Archived from the original on 2024-03-23. Retrieved 2024-03-23.
  25. ^ "Meise Botanic Garden Herbarium (BR)". www.mycoportal.org. Retrieved 2024-03-23.
  26. ^ "MyCoPortal Detailed Collection Record Information". www.mycoportal.org. Retrieved 2024-03-23.
  27. ^ Brinker, Samuel (2020). "Contributions to the Ontario flora of lichens and allied fungi, with emphasis on the Great Lakes Basin". Opuscula Philolichenum. 19: 58–157.
  28. ^ a b c d "Herbarium samples". Italic 7.0, a publication of University of Trieste.
  29. PMC 5914158
    .
  30. ^ "Enchylium conglomeratum". georgiabiodiversity.org. Retrieved 2024-03-17.
  31. ^ a b c "Definitions of NatureServe Conservation Status Ranks". NatureServe. Retrieved 2024-03-18.
  32. ^ Dotted Jelly Lichen | Ohio Department of Natural Resources (ohiodnr.gov)
  33. ^ "Enchylium conglomeratum | The British Lichen Society". British Lichen Society. Retrieved 2024-03-17.
  34. ^ a b c "Distribution Map Threat - Protection - Indigenate". Swiss Federal Institute for Forest, Snow and Landscape Research. Retrieved 2024-03-18.
  35. ^ "Liste der National Prioritären Arten und Lebensräume". Federal Office for the Environment (in German). Retrieved 2024-03-18.

External links

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