Monographs Details: Mastigolejeunea auriculata (Wilson & Hook.) Schiffn.
Authority: Thiers, Barbara M. & Gradstein, S. Robbert. 1989. Lejeuneaceae (Hepaticae) of Australia. I. Subfamily Ptychanthoideae. Mem. New York Bot. Gard. 52: 79 p.
Discussion:Jungermannia auriculata Wils. in Drummond, Musci Amer. Exsic. no. 170. 1841. Lejeunea auriculata (Wils.) Sull. in Gray, Man. Bot. ed. 2, 699. 1856. Ptychocoleus auriculatus (Wils.) Trevis., Mem. Reale 1st. Lomb. Mat. Nat. III 4: 405. 1877. Type. U.S.A. Louisiana: New Orleans, Drummond s.n., Musci Amer. Exsic. no. 170 (holotype, BM; isotype, PC).
Phragmicoma humilis Gott. in Lindenb. et al., Syn. Hepat. 299. 1845. Ptychocoleus humilis (Gott.) Trevis., Mem. Reale 1st. Lomb. Mat. Nat. III 4: 405. 1877. Lejeunea humilis (Gott.) Spruce, Trans. & Proc. Bot. Soc. Edinburgh 15: 101. 1884. Mastigolejeunea humilis (Gott.) Schiffn. in Engler & Prantl, Nat. Pflanzenfam. 1(3): 129. 1895, syn. nov. Type. Java. Junghuhn s.n. & s.d. (holotype, STR? [not available on loan]; isotypes, W [#6012], G [“herb. Mus. Vin-dob. 6012”]).
Phragmicoma cuneistipula Mitt, in Seemann, Fl. Vit. 412. 1873. Type. [New Caledonia.] Isle of Pines, Strange s.n. (lectotype [designated here], NY). Isle of Pines, Milne s.n. (syntype, NY). The Strange collection is chosen as the lectotype from among the syntypes because it is more copious. A third syntype collection (Pacific Islands, Beechey s.n., NY) contains Mastigolejeunea virens and is excluded because its ovate-oblong leaves are at odds with the original description (“folia . . . orbiculato-ovata”).
Schuster (1980) and Mizutani (1986) provided complete descriptions and illustrations of this species [Mizutani’s is under M. humilis (Gott.) Schiffn.]. Mastigolejeunea auriculata is a very widespread and common pantropical species that carries many synonyms. It was originally described from tropical America. In Africa it was known as Mastigolejeunea carinata (Mitt.) Steph. (synonymized by Gradstein & Inoue, 1980), and in Southeast Asia it was known as M. humilis (Gott.) Schiffn., which is synonymized here. Verdoom (1934a) treated M. humilis in a broad sense and placed M. virens (Ångstr.) Steph. in its synonymy, but Mizutani (1986) showed that the two taxa are distinct by their very different lobule teeth. Mastigolejeunea auriculata is widespread in Indomalesia and may therefore be expected to occur in Australia as well.