Riccardia angusticosta (Steph.) Grolle

Reeb, Catherine & Gradstein, Robbert, 2020, A taxonomic revision of Aneuraceae (Marchantiophyta) from eastern Africa with an interactive identification key, Cryptogamie, Bryologie 20 (2), pp. 11-34 : 16

Riccardia angusticosta (Steph.) Grolle

( Fig. 2 A-E)

Aneura angusticosta Steph., Denkschriften der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Classe 88: 724 (1913). — Type: Tanzania, Usambara, 1909, Brunnthaler s.n. (G[G0067547]!).

Aneura congoana Steph. , Species Hepaticarum 6: 23 (1917). — Type: Zaire ( Reeb & Bardat 2014).

Aneura stephanii Besch. ex Steph., Revue Bryologique 20: 60 (1893). ( Riccardia stephanii [Besch. ex Steph.] E.W.Jones nom. illeg.). — Type: Congo ( Jones 1956 as R. stephanii ).

Aneura travisiana Pearson, Memoirs and Proceedings of the Manchester Literary and Philosophical Society 65: 1 (1921). — Type: Cameroon ( Jones 1956 as R. stephanii ).

Riccardia amazonica auct., (e.g. Meenks & Pócs 1985; Wigginton 2004; Reeb & Bardat 2014), non typus.

Riccardia capensis S.W.Arnell , see Index Hepaticarum — Type: South Africa ( Reeb & Bardat 2014).

FURTHER SPECIMENS EXAMINED. — Gabon. Ougoué-Invido, réserve intégrale d’Ipassa, 00°30’N, 12°48’E, 510 m, 18.IV.2006, Vanderpoorten GAB1695* (LG).

Ghana. West Region, Aiyinasi, 13.II.1971, Jones 1364 C ( E 00018737), 1361 C ( G 00264220).

Madagascar. Alaotra-Mangoro, Vohibola reserve, 18°34’53.4”S, 49°14’32.2”E, 5 m, 18.IV.2010, Reeb, Andriamanantena & Bidault CRAE 176 ( PC 0764349 A); Sava, Makirovana, 14°10’29.3”S, 49°57’07.7”E, 695 m, 06. V.2010, Reeb CR 275 ( PC 0763840 A),

Figures

FIG. 2. — Riccardia angusticosta (Steph.) Grolle: A, thalli; B, main axis in cross section; C, ultimate branch in cross section; D, calyptra; E, upper portion of calyptra, showing umbo. From Thollon s.n. (Aneura stephanii TYPE), Pócs 9883/H, Brenan140. Riccardia chamedryfolia (With.) Grolle: F, thalli; G, portion of thallus showing male and female branches;H, main axis in cross section;C, ultimate branch in cross section.From Reeb CR11156 (PC0763897), CR11418 (PC0763898), Hylander KH5497 (PC0763862). Riccardia corbieri (Steph.) Reeb & Gradst. comb. nov.: J, thalli; K, main axis in cross section; L, ultimate branch in cross section; M, portion of thallus with female branch;N, ultimate branches and calyptra.From Beaver B304 (PC0763848), Reeb CR297 (PC0763838A),CR295 (PC0763837A). Riccardia fastigiata (Lehm.) Trevis.: O, thalli; P, main axis in cross section; Q, ultimate branches in cross section; R, portion of thallus with femalre branches and calyptra. From Vojko 9422/AP, Pócs 6929/T, Orban 9615/CB (PC0146833). Scale bars: A, D-F, J, M-O, R, 1 mm; B, C, G-I, K, 500 µm; L, P, Q, 200 µm.