Verrucariaceae Bagliettoa calciseda (Verrucaria calciseda) Growth type crustose Chemical results negative Frequent but probably under-recorded on calcareous rocks BLS conservation evaluation: LC NS Immersed white or pale-grey thallus. Perithecia immersed in pits, sometimes with tiny radiating cracks. Spores 23-27(-29) x 10-13(-15) µm, contents sometimes dull grey-brown. Perispore absent. Micro photo below. Similar: Bagliettoa baldensis (Verrucaria baldensis)

Microscope photograph

Bagliettoa calciseda
Dancing Ledge and Portland, Dorset. February 2013 and March 2016