Batrachospermum longiarticulatum Necchi

Ganesan, E. K., West, John A. & Jr, Orlando Necchi, 2018, A catalogue and bibliography of non-marine (freshwater and estuarine) Rhodophyta (red algae) of India, Phytotaxa 364 (1), pp. 1-48 : 16

Batrachospermum longiarticulatum Necchi

Rath & Adikary 2009, p. 62, figs 1 A–L; Suseela & Toppo 2015, p. 138, Pl.2, figs 4–6.

Distribution in India: Assam (Silchar); Odisha (Gajapati district, Badadeoparbat in a swiftly flowing stream, between Chelligargh, but given more precisely in an India map as Chelligada) and Ramagiri Udayagiri, Oct., Jan); Sikkim (Gangtok, Mar. Dec.).

Notes: Identification of this species to B. longiarticulatum in India needs critical study, since the photomicrographs of the primary fascicles shown for the Indian specimens are much shorter than shown in the original description from Brazil. In addition, the Indian record constitutes a disjunct range extension from northern Brazil.A re-investigation with genetic data would clarify (i) whether the plants from India and Brazil are the same species and (ii) the phylogenetic and phylogeographic affinities between B. longiarticulatum and similar species.

Batrachospermum nodosum J. N. Misra & A. K. Dey [non Batrachospermum nodosum (Skuja) Necchi & Entwisle ; = Nothocladus nodosus Skuja ]

Misra & Dey 1959, p. 128. Figs 12–15; Balakrishnan & Chaugule 1980c, p. 239; Desikachary et al. 1990, Part II A, p. 93.

Distribution in India: Uttarakhand (on small stones in Khansro River, Dehra Dun).

Notes: Misra & Dey (1959) described it as a new species, but like B. bhardwajii , this species is also an invalid name with no Latin diagnosis (Silva 2017; Guiry & Guiry 2017). Balakrishnan & Chaugule (1980c) and Desikachary et al. (1990) pointed out that in some vegetative features, the Indian B. nodosum resembles, B. pyramidale (synonym B. gelatinosum ), but critical details (nature of carpogonial branches, gonimoblast development and mature cystocarps) are needed to confirm the validity of this species. A holotype specimen was not designated by the authors.