David L. Hawksworth

David Leslie Hawksworth (born 1946 in Sheffield, UK) is a British mycologist and lichenologist currently with a professorship in the Universidad Complutense de Madrid in Madrid, Spain and also a Scientific Associate of The Natural History Museum in London. Hawksworth has had a prolific career, authoring nearly 600 scientific works (including almost 60 books), describing approximately 250 new taxa, and proposing around 500 new combinations or new names in fungal nomenclature. In 1996, he was honoured as Commander of the British Empire (CBE). In 2002, he received the Acharius Medal from the International Association for Lichenology. Five genera and many species have been named in his honour.

Hawksworth's research has focused on broad nomenclatural issues, fostering the integration of fungal nomenclature, and global assessment of fungal diversity. He has conducted systematic revisions of neglected groups, including lichenicolous taxa and fungi at the borderline of lichenisation, with a particular interest in the family Parmeliaceae. From 1983 to 1997, Hawksworth served as director of the International Mycological Institute (IMI), overseeing its name change to Commonwealth Mycological Institute in 1986 and its move from Kew to Egham in 1993.

He married Patricia Wiltshire, a leading forensic ecologist and palynologist in 2009. , he is the Editor-in-Chief of the journals ''IMA Fungus'' and ''Biodiversity and Conservation''.

Education

Born in Sheffield in 1946, David Hawksworth studied at the University of Leicester. From this institution, he earned a BSc in 1967, a PhD in 1970, and a DSc in 1980.

Career reflections

In a 2020 article reflecting on his 50-year career in mycology, Hawksworth shared ten key lessons he had learnt as a fungal systematist. Among these, he emphasised the importance of thorough research before describing new taxa, stressing that it is far easier to introduce a new name than to determine if a fungus has already been described. Hawksworth advocated for examining as many specimens as possible to understand species variation and utilising a wide range of techniques to study fungal characteristics.

Hawksworth highlighted the significance of careful microscopic examination and measurement of fungal structures, noting the potential impact of different mounting media on spore sizes. He encouraged mycologists to challenge existing ideas and present new hypotheses, citing his own work in integrating lichen-forming fungi into a single classification system with other fungi. Another key lesson stressed the importance of preserving type specimens and vouchers for unusual records to ensure the validity of taxonomic work.

Throughout his career, Hawksworth has been at the forefront of adopting new technologies in mycological research. He was among the first in the UK to use chromatography, scanning electron microscopy, and numerical taxonomy in the systematics of lichen-forming fungi. Hawksworth has also been a proponent of molecular methods in fungal taxonomy, collaborating with other researchers to address key questions in the field. He emphasised the value of teamwork in modern mycology, noting that multi-authored papers have become the norm in addressing complex research questions.

Recognition

In 1978, Hawksworth received the Bicentenary Medal of the Linnean Society. He was awarded an honorary doctorate from the Umeå University in 1996. In 2014, Hawksworth was awarded the Ainsworth Medal from the International Mycological Association, given to "an individual for recognition of extraordinary service to world mycology".

Eponymy

Five genera and many species have been named to honour Hawksworth. These include:
'' Davidhawksworthia'' ; '' Dlhawksworthia'' ; '' Hawksworthia'' ; '' Hawksworthiana'' ; '' Hawksworthiomyces'' ; '' Arthonia hawksworthii'' ; '' Ascotrichella hawksworthii'' ; ''Cylindrocladium hawksworthii'' ; ''Daldinia hawksworthii'' ; '' Epaphroconidia hawksworthii'' ; '' Laburnicola hawksworthii'' ; '' Lichenoconium hawksworthii'' ; ''Lichenodiplis hawksworthii'' ; '' Melanelixia hawksworthii'' ; '' Murispora hawksworthii'' ; ''Polycoccum hawksworthianum'' ; ''Rhopalostroma hawksworthii'' ; ''Sclerococcum hawksworthii'' ; '' Skyttea hawksworthii'' ; '' Taeniolella hawksworthiana'' ; and ''Uromyces hawksworthii'' .

In 2020, on the occasion of David Hawksworth's 70th birthday, Robert Lücking and colleagues described 70 new species of lichenised basidiomycete fungi in the genus ''Cora'', many of which were named in his honour. This represented the largest number of new species ever described in a single publication for lichens. The authors devised creative variations on Hawksworth's name for the species epithets, including:

*Direct references like '' C. hawksworthiana'' and '' C. davidia''
*Anagrams such as '' C. dalehana'' and '' C. viliewoa''
*References to the meaning or origin of his name, like '' C. accipiter'' ("hawk")
*Plays on his initials DLH, as in '' C. hochesuordensis''
*Allusions to places associated with the Hawksworth name, e.g. '' C. hafecesweorthensis''

The paper and mass-naming event highlighted Hawksworth's significant contributions to mycology and lichenology over his career. It also demonstrated the previously unrecognised biodiversity in the genus ''Cora'', which Hawksworth had earlier worked on nomenclaturally.

Selected publications

Articles

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Books and monographs

* with Francis Rose:
* with David J. Hill:

as editor

* with B. W. Ferry and M. S. Baddeley:
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* with Alan T. Bull:
* with Alan T. Bull:
* with Alan T. Bull:
* with Alan T. Bull:
* with Alan T. Bull:

See also

* :Taxa named by David Leslie Hawksworth

References

Further reading

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{{DEFAULTSORT:Hawksworth, David Leslie
1946 births
Living people
Alumni of the University of Leicester
British mycologists
British lichenologists
Complutense University of Madrid alumni
Acharius Medal recipients
Commanders of the Order of the British Empire
Independent councillors in the United Kingdom
People educated at the Herbert Strutt School
Presidents of the International Mycological Association
Scientists from Sheffield