Trimmatothelopsis californica, Jason Dart 577, Holotype A areolate thallus with apothecia B thallus areoles with pycnidia C vertical section of apothecium D apothecial crown E hemiamyloid reaction of hymenium and amyloid reaction of subhymenium and bleeding into hypothecium turning it a lighter blue F young ascus G young ascus in IKI H paraphyses in IKI I cortex above interrupted algal layer J mostly biguttulate ascospores K vertical section of the thallus with pycnidia L hyphal tissue below pycnidium M long ampulliform conidiogenous cells producing conidia N mass of conidia in pycnidial gel. Scale bars: 500 µm (A, B); 100 µm (C); 50 µm (D, E, K); 20 µm (F–I, L); 10 µm (M); 5 µm (J, N).