Hemithecium is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed by Vittore Benedetto Antonio Trevisan de Saint-Léon in 1853.
Fissurina is a genus of lichenized fungi in the family Graphidaceae. It has about 160 species, most of which are found in tropical regions.
Diorygma is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed by Franz Gerhard Eschweiler in 1824. Species of the genus are widely distributed in tropical and subtropical regions of the world.
Acanthothecis is a genus of lichen-forming fungi in the family Graphidaceae. The genus was circumscribed by Frederick Edward Clements in 1909.
Leptogium verrucosum is a rare species of foliose lichen in the family Collemataceae. Found in India, it was formally described as a new species in 2010 by Archana Dube and Urmila Vasudev Makhija. The type specimen was collected from the walls of the Purandar fort (Maharashtra) at an elevation of 1,350 m (4,430 ft). It has also been recorded growing on bark in moist shady locations. Characteristics of Leptogium patwardhanii include the numerous pycnidia that give the thallus a warty appearance, and the wrinkled upper and lower surfaces. Its ascospores are muriform, have acute ends, and measure 15–32 by 6–12 μm.
Fissurina duplomarginata is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in Singapore, it was formally described as a new species in 2015 by Gothamie Weerakoon and Robert Lücking. The type specimen was collected by the first author from a low-elevation primary forest in the Bukit Timah Nature Reserve. It is only known to occur at the type locality. The greenish-grey thallus of the lichen is 25–75 μm thick, and covers an area of up to 5 cm (2 in) in diameter. It lacks a prothallus, soredia, and isidia. The photobiont partner is a member of the green algal genus Trentepohlia with yellowish-green cells measuring 8–14 by 6–9 μm; they occur in the lichen as a layer that is 20–60 μm thick. The species epithet refers to the double margin of the lirellae.
Pseudochapsa lueckingii is a species of corticolous (bark-dwelling), crustose lichen in the family Graphidaceae. It is known only from a single collection in São Paulo, Brazil.
Anisomeridium lateriticum is a species of saxicolous (rock-dwelling) lichen in the family Monoblastiaceae. Found in Brazil, it was formally described as a new species in 2013 by lichenologists André Aptroot and Marcela Cáceres. The type specimen was collected by the authors in Fazenda São Francisco north of Porto Velho (Rondônia), where it was found growing on lateritic rock in a primary rainforest.
Ocellularia subudupiensis is a rare species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in Singapore, it was formally described as a new species in 2015 by Gothamie Weerakoon and Robert Lücking. The type specimen was collected by the first author from a low-elevation primary forest in the Bukit Timah Nature Reserve. It is only known to occur at the type locality. The species epithet refers to its similarity with Ocellularia udupiensis. It differs from this lichen in its relatively rough thallus surface in addition to its secondary chemistry, as it contains three unidentified lichen products that are detectable using thin-layer chromatography.
Graphis flavovirens is a species of script lichen in the family Graphidaceae. Found in the Andaman Islands, it was formally described as a new species in 2005 by Urmila Makhija and Bharati Adawadkar. The type specimen was collected from Parlobjig. The species epithet "flavovirens", which combines the Latin words for yellow and green, refers to the colour of the thallus. Its ascomata are in the form of conspicuous lirellae: they are long and black, with a branching pattern ranging from simple to radiately and profusely branched; this particular branching pattern is known as the centrifuga-morph. G. flavovirens produces ellipsoidal ascospores that have from 3 to 9 transverse septa and measure 16–42 by 4–8 μm. G. flavovirens contains two lichen products: stictic acid and constictic acid.
Graphis distincta is a species of script lichen in the family Graphidaceae. Found on the Andaman Islands, it was formally described as a new species in 2005 by Urmila Makhija and Bharati Adawadkar. The type specimen was collected from Port Mount. The species epithet distincta, derived from the Latin distinctus ("distinct"), refers to "the distinct species".
Fissurina andamanensis is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in the Andaman Islands, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from the Betapur Range. The lichen has a yellowish-brown thallus that is glossy, cracked, and slightly verrucose. It has lirellate ascomata that are 1–6 mm long, simple to irregularly branched, and the same colour as the thallus, with a structure of the dumastii-type. The ascospores have 3 transverse septa, are hyaline, and measure 20–27 by 7–10 μm, with a thin halo. It contains salazinic acid, which is an uncommon lichen product in the genus Fissurina.
Fissurina disposita is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from a subtropical forest near Cherrapunji (Meghalaya); it has also been recorded in the shola forest of Karnataka. The lichen has a brown, verrucose, cracked, and flaking thallus. It has lirellate ascomata that are 0.2–0.5 mm long, crowded, terminally acute, and have a structure of the comparilis-type. The ascospores are hyaline, somewhat muriform, and measure 10–12 by 5–6 μm, with 3–4 transverse and 1–2 longitudinal septa.
Fissurina immersa is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from Mudigere (Karnataka). The lichen has a brown, uneven, finely cracked, and glossy thallus that is delimited by a black hypothalloidal region at the periphery. The lirelline ascomata are the same colour as the thallus and are 0.2–1.5 mm long, straight to curved, terminally acute, and have a dumastii-type structure. The ascospores are hyaline, somewhat muriform, and measure 12–13 by 3–5 μm, with 3–4 transverse and 1 vertical septa. It contains norstictic acid in its thallus.
Fissurina indica is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from Wynad forest (Kerala). The thallus of this lichen is greenish and glossy, with a cracked and verrucose texture, and is delimited by a black hypothalloidal region at its periphery. The small ascomata are present all over the thallus and have acute ends, a dumastii-type structure, and are the same colour as the thallus. The ascospores are hyaline, muriform, multilocular, and measure 32–42 by 12–20 μm with an indistinct halo. No lichen products were detected in collected specimens.
Fissurina microcarpa is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from Upper Kodayar. The lichen thallus that is brownish, cracked, warty, and glossy. Its lirelline ascomata are all over the thallus, short, and the same colour as the thallus, with a structure of dumastii-type. The lichen's ascospores are hyaline, muriform, and multilocular; they measure 87–125 by 25–37 μm and have a 5–8 μm thick halo.
Fissurina nicobarensis is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in the Nicobar Islands, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from a tropical rainforest on Great Nicobar Island; the species epithet refers to the type locality. The lichen has a yellowish-brown thallus, which is warty and glossy and is delimited by a black hypothalloidal region. The lirelline ascomata are branched, 1–10 mm long, semi-emergent, and have a creamish-coloured disc. The ascospores are hyaline, somewhat muriform, and ellipsoid with a thin halo; they have dimensions of 10–15 by 6–7 μm.
Fissurina simplex is a species of corticolous (bark-dwelling), crustose lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from an evergreen forest in Silent Valley National Park (Kerala); it has also been recorded from a humid deciduous forest in Karnataka. The lichen has a brown, glossy, and cracked thallus that is delimited by a black hypothalloidal region at its periphery. The ascomata are lirellate, 0.5–1.5 mm long, simple, straight, and the same colour as the thallus. They are immersed to slightly raised, arising as a swelling that then cracks and gapes, and have a terminally acute structure of subcontexta-type. The ascospores are hyaline, muriform, and measure 70–78 by 20–25 μm with a thin halo. Fissurina simplex contains two lichen products: stictic acid and hypostictic acid.
Fissurina submonospora is a species of corticolous (bark-dwelling), crustose lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2012 by Bharati Sharma, Pradnya Khadilkar, and Urmila Makhija. The type specimen was collected from Upper Kodayar, where it was found growing in a humid evergreen forest. This lichen has a brownish grey to dark brown, cracked and uneven thallus, delimited by a black hypothalloid region at its periphery. Its ascomata are short, simple to branched, and immersed, with a structure of dumastii-type, while the disc is slit-like. The ascospores are hyaline, muriform, with 10–15 transverse and 4–5 longitudinal septa, and typically measure 70–100 by 20–50 μm, with a 2.5–10 μm-thick halo.
Platythecium commiscens is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae. Found in India, it was formally described as a new species in 2005 by Bharati Adawadkar and Urmila Vasudev Makhija. The type specimen was collected from Kollaimalai. The lichen has a whitish-green to greenish coloured thallus that is encircled by a thin black prothallus. The ascomata are in the form of short, highly branched lirellae that are immersed in the thallus; the lirellae are intermingled and crowded together. The species epithet, derived from the Latin commiscens ("intermingling"), refers to this characteristic feature.
