David John Galloway

Pseudocyphellaria haywardiorum is a species of corticolous (bark-dwelling), foliose lichen in the family Peltigeraceae. It is found in New Zealand, where it is considered "at risk" under the New Zealand Threat Classification System. Pseudocyphellaria haywardiorum has a more or less circular thallus measuring 30–80 mm in diameter, loosely attached from its edges to its centre, featuring rising wavy margins with rounded lobes that overlap in a complex pattern. The upper surface varies in colour from dark grey-blue to brown-black, becoming darker at the lobe tips when moist, and displays a

Menegazzia testacea is a species of lichen found in New Zealand and Australia.

Menegazzia eperforata is a species of foliose lichen found in New Zealand and Australia.

Menegazzia castanea is a species of foliose lichen from New Zealand and Australia.

Fuscoderma is a genus of lichenized fungi in the family Pannariaceae. It was originally circumscribed as a subgenus of the genus Leioderma by David Galloway and Per Magnus Jørgensen in 1987. The same authors promoted it to generic status a couple of years later in 1989. The New Guinean species F. papuanum was added to the genus in 2002.

Degelia is a genus of lichen-forming fungi in the family Pannariaceae. The genus is named after Swedish lichenologist Gunnar Degelius. The genus was circumscribed by Lars Arvidsson and David John Galloway in 1981.

Yarrumia colensoi is a species of lichen. It occurs in New Zealand, but is not endemic.

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Pseudocyphellaria brattii is a species of foliose lichen in the family Peltigeraceae. It was described as new to science in 1997 by lichenologists David John Galloway and Gintaras Kantvilas. The type specimen was collected along Mt. Dundas Track (Tasmania), where it was found growing on dead wood in a rainforest at an altitude of 700 m (2,300 ft). The specific epithet honours Tasmanian lichenologist Geoffrey Charles Bratt, who, according to the authors, "helped to keep Australian lichenology alive during the 'lean years'". The lichen is endemic to Tasmania, where it is uncommon. It typically

Placopsis fusciduloides is a species of lichen in the family Trapeliaceae. It was described by David J. Galloway from New Zealand, after he recognised that some specimens filed under other names (especially P. gelida) represented an undescribed taxon; additional material was later matched to the same species from British Columbia (Canada) and Bolivia. It was subsequently documented from Chile and Argentina in southern South America.

Pannaria durietzii is a species of corticolous (bark-dwelling), foliose lichen in the family Pannariaceae. Primarily found in New Zealand, it has also been reported in southeastern Australia and Tasmania, and southern Chile, indicating a broader southern hemisphere distribution.

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Menegazzia ultralucens is a species of lichen found in New Zealand and Australia.

Menegazzia subpertusa is a species of foliose lichen found in New Zealand, Australia, and South America.

Menegazzia nothofagi is a species of lichen from New Zealand and Australia. It was originally named as a species of Parmelia by Austrian botanist Alexander Zahlbruckner in 1940.

Menegazzia caliginosa is a species of foliose lichen from New Zealand, Australia and South America.

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Caloplaca papanui is a species of saxicolous (rock-dwelling) crustose lichen in the family Teloschistaceae. The species was described in 2004 from specimens collected at Papanui Inlet on the Otago Peninsula. It is characterised by its cream-white thallus forming small rosettes and minute golden-yellow apothecia (fruiting bodies) with narrowly ellipsoid ascospores. C. papanui grows on hard coastal rocks in the upper intertidal zone, distributed along the south-eastern coasts of New Zealand's main islands from Wellington to Otago.

Caloplaca murrayi is a species of crustose lichen in the family Teloschistaceae. It is endemic to Aotearoa New Zealand. Its ochre-to-rusty thalli and crowded, rust-brown fruiting bodies make it conspicuous on sun-washed greywacke, schist and other hard rocks from Wellington southwards.

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Umbilicaria murihikuana is a rare species of saxicolous (rock-dwelling) lichen in the family Umbilicariaceae. It is endemic to New Zealand, where it occurs in mountainous, high-rainfall areas of Otago and Southland. It grows on exposed rocks and boulders at altitudes between 1,000 and 1,500 m (3,300 and 4,900 ft), in subalpine to alpine habitats.

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Punctelia subalbicans is a species of foliose lichen in the family Parmeliaceae. It is found in Australia and New Zealand, where it grows on the bark of various tree species.

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