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Electronic Flora of South Australia Family Fact Sheet

TRIBE JANIEAE Johansen & Silva 1978: 414

Phylum Rhodophyta – Class Florideophyceae – Order Corallinales – Family Corallinaceae – Subfamily Corallinoideae

Thallus dichotomously, pinnately or irregularly branched, holdfast crustose, in some taxa with stolons. Intergenicula with 1–6 (–25) tiers of medullary cells each 80–170 µm long. Fusion cell thick and compact (40–130 µm broad), with carposporangial filaments only from the margins; male conceptacles with narrow chambers (90–250 µm), high ceilings and short canals (30–120 µm).

Reproduction: Tetrasporangia large, fewer than 15 per conceptacle, without paraphyses, often with branchlets on conceptacles.

References:

JOHANSEN, H.W. & SILVA, P.C. (1978). Janieae and Lithotricheae: two new tribes of articulated Corallinaceae (Rhodophyta). Phycologia 17, 413–417.

The Marine Benthic Flora of Southern Australia Part IIIB complete list of references.

Author: H.B.S. Womersley & H.W. Johansen

Publication: Womersley, H.B.S. (28 June, 1996)
The Marine Benthic Flora of Southern Australia
Rhodophyta. Part IIIB. Gracilarialse, Rhodymeniales, Corallinales and Bonnemaisoniales
Reproduced with permission from The Marine Benthic Flora of Southern Australia Part IIIB 1996, by H.B.S. Womersley. Australian Biological Resources Study, Canberra. Copyright Commonwealth of Australia.

KEY TO GENERA OF JANIEAE

1. Thallus dichotomous with terete or compressed intergenicula bearing axial conceptacles

JANIA

1. Thallus pinnate or dichotomous, with compressed intergenicula bearing conceptacles axially in lateral branchlets or in acute lobes

2

2. Thallus pinnate; axial intergenicula compressed and usually bearing two or more subterete branchlets, sometimes adventitiously, without lobes; conceptacles in branchlets, usually single with apical pores, with 1–3 branchlets arising from spore producing conceptacles

HALIPTILON

2. Thallus subdichotomous; most intergenicula compressed, unbranched and bilobed, lobes acute or rounded; conceptacles embedded within lobes with adaxial or apical pores

CHEILOSPORUM


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