# Polyblastidium

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***Polyblastidium*** is a [genus](/source/Genus) of [foliose lichens](/source/Foliose_lichen) in the family [Physciaceae](/source/Physciaceae). It has 18 species.[1] The genus was [circumscribed](/source/Circumscription_(taxonomy)) by German lichenologist [Klaus Kalb](/source/Klaus_Kalb) in 2015, with *[Polyblastidium japonicum](/source/Polyblastidium_japonicum)* assigned as the [type species](/source/Type_species). *Polyblastidium* is similar in [morphology](/source/Morphology_(biology)) to *[Heterodermia](/source/Heterodermia)*, but its lower surface is cobweb-like in structure (*arachnoid*), and its [ascospores](/source/Ascospore) are mostly 1-[septate](/source/Septum) with 1 to 3 sporoblastidia (small subsidiary cavities). It is this latter feature that is referenced in the genus name *Polyblastidium* (*poly* = "many" + sporoblastidia). The genus contains several species that were formerly classified in the genus *[Anaptychia](/source/Anaptychia)* ([section](/source/Section_(botany)) *Polyblastidium* [series](/source/Series_(biology)) *Polyblastidium*).[2]

## Species

- *[Polyblastidium appendiculatum](/source/Polyblastidium_appendiculatum)* (Kurok.) Kalb (2015)
- *[Polyblastidium casarettianum](/source/Polyblastidium_casarettianum)* (A.Massal.) Kalb (2015)
- *[Polyblastidium chilense](/source/Polyblastidium_chilense)* (Kurok.) Kalb (2015)
- *[Polyblastidium corallophorum](/source/Polyblastidium_corallophorum)* (Taylor) Kalb (2015)
- *[Polyblastidium dendriticum](/source/Polyblastidium_dendriticum)* (Pers.) Kalb (2015)
- *[Polyblastidium fragilissimum](/source/Polyblastidium_fragilissimum)* (Kurok.) Kalb (2015)
- *[Polyblastidium hypocaesium](/source/Polyblastidium_hypocaesium)* (Yasuda ex Räsänen) (Kalb 2015)
- *[Polyblastidium hypoleucum](/source/Polyblastidium_hypoleucum)* (Ach.) Kalb (2015)
- *[Polyblastidium japonicum](/source/Polyblastidium_japonicum)* (M.Satô) Kalb (2015)
- *[Polyblastidium magellanicum](/source/Polyblastidium_magellanicum)* (Zahlbr.) Kalb (2015)
- *[Polyblastidium microphyllum](/source/Polyblastidium_microphyllum)* (Kurok.) Kalb (2015)
- *[Polyblastidium neglectum](/source/Polyblastidium_neglectum)* (Lendemer, R.C.Harris & E.A.Tripp) Kalb (2015)
- *[Polyblastidium propaguliferum](/source/Polyblastidium_propaguliferum)* (Vain.) Kalb (2015)
- *[Polyblastidium queenslandicum](/source/Polyblastidium_queenslandicum)* (Elix) Kalb (2015)
- *[Polyblastidium squamulosum](/source/Polyblastidium_squamulosum)* (Degel.) Kalb (2015)
- *[Polyblastidium subneglectum](/source/Polyblastidium_subneglectum)* (Elix) Kalb (2015)
- *[Polyblastidium togashii](/source/Polyblastidium_togashii)* (Kurok.) Kalb (2015)
- *[Polyblastidium violostriatum](/source/Polyblastidium_violostriatum)* (Elix) Kalb (2015)

## References

1. Wijayawardene, Nalin; Hyde, Kevin; Al-Ani, Laith Khalil Tawfeeq; Somayeh, Dolatabadi; Stadler, Marc; Haelewaters, Danny et al. (2020). "Outline of Fungi and fungus-like taxa". *Mycosphere*. **11**: 1060–1456. [doi:10.5943/mycosphere/11/1/8](https://doi.org/10.5943/mycosphere/11/1/8). [hdl:10481/61998](https://hdl.handle.net/10481/61998)

1. Mongkolsuk, Pachara; Meesim, Sanya; Poengsungnoen, Vasun; Buaruang, Kawinnat; Schumm, Felix; Kalb, Klaus (2015). "The lichen family Physciaceae in Thailand—II. Contributions to the genus *Heterodermia* sensu lato". *Phytotaxa*. **235** (1): 1–66. [doi:10.11646/phytotaxa.235.1.1](https://doi.org/10.11646/phytotaxa.235.1.1)

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