Gracilaria subgen. Gracilaria

Gurgel, Carlos Frederico D., Norris, James N., Schmidt, William E., Le, Hau Nhu & Fredericq, Suzanne, 2018, Systematics of the Gracilariales (Rhodophyta) including new subfamilies, tribes, subgenera, and two new genera, Agarophyton gen. nov. and Crassa gen. nov., Phytotaxa 374 (1), pp. 1-23 : 7

Gracilaria subgen. Gracilaria

DIAGNOSTIC FEATURES: Shallow cup-shaped cortical spermatangial conceptacles (i.e., textorii - type only, sensu Yamamoto 1975, 1978, 1984) and a cystocarp placenta composed of either disorganized clusters of gonimoblast cells of different cell sizes or gonimoblasts forming organized parallel cellular columns flabellate in shape in cross section. The latter character considered an autapomorphy in this subgenus (i.e., observed in Gracilaria flabelliformis ( Gurgel et al. 2004b) and Gracilaria cf. vieillardii ( Withell et al. 1994) . Post-fertilization fusion cell persistent and often conspicuous (e.g., in G. tikvahiae ).

PERTINENT SPECIES IN GRACILARIA SUBGEN. GRACILARIA : Gracilaria apiculata P. Crouan et H. Crouan ; G. apiculata subsp. candelabriformis Gurgel, Fredericq et J.N. Norris ; G. beckeri (J. Agardh) Papenfuss ; G. bursa-pastoris (S.G.Gmelin) P.C.Silva ; G. brasiliensis Gurgel et Yoneshigue-Valentin ; G. capensis F.Schmitz ex Mazza ; G. cervicornis (Turner) J.Agardh ; G. coronopifolia J.Agardh , G. cuneata Areschoug , G. curtissiae J.Agardh ; G. flabelliformis (P.Crouan et H.Crouan) Fredericq et Gurgel ; G. flabelliformis subsp. aionae Gurgel, Fredericq et J.N.Norris ; G. flabelliformis subsp. simplex Gurgel, Fredericq et J.N.Norris ; G. galetensis Gurgel, Fredericq et J.N.Norris ; G. hayi Gurgel, Fredericq et J.N.Norris ; G. intermedia J. Agardh ; G. intermedia subsp. ganesana Gurgel, Fredericq et J.N.Norris ; G. gurgelii Freshwater (in Hardesty & Freshwater 2018) (referred to as G. mammillaris (Montagne) Howe in Gurgel & Fredericq 2004); G. multipartita (Clement) Harvey ; G. occidentalis (Børgesen) M.Bodard , G. oliveirarum Gurgel, Fredericq et J.N.Norris ; G. ornata Areschoug ; G. cearensis (A.B.Joly et Pinheiro) A.B.Joly et Pinheiro ; G. spinulosa (Okamura) C.F.Chang et B.-M.Xia; G. stipitata Withell, A.Millar et Kraft ; G. tikvahiae J.McLachlan ; G. textorii (Suringar) De Toni ; G. venezuelensis W.R.Taylor ; G. vieillardii P.C.Silva. ; and G. yoneshigueana Gurgel, Fredericq et J.N.Norris.

Based on other published studies: G. hummii Hommersand et Freshwater (2009) , G. stipitata Withell, Millar et Kraft (1994) , G. brasiliensis Gurgel et Yoneshigue-Valentin in Gurgel et al. (2008), G. domingensis (Kützing) Sonder ex Dickie ( Lyra et al. 2015) ; G. baiana Lyra, Gurgel, M.C.Oliveira et Nunes in Lyra et al. (2015); G. suzannae Soares, Gurgel et Fujii (2018) ; G. abbottiana (Gurgel, unpubl. data); G. coppejansii Muangmai, Lewmanomont, Prathep, Terada et Zuccarello (2017) ; G. lantaensis Muangmai, Zuccarello, Noiraksa et Lewmanomont (2014) ; G. denticulata Schmitz ex Mazza ( Iyer et al. 2005) ; G. taiwanensis Lin, Liu et Payri (2012) ; G. huangii S.M. Lin , et De Clerck (2006); G. cuneifolia (Okamura) I.K.Lee et Kurogi ( Ardito et al. 2017) ; G. parvispora Abbott ( Ardito et al. 2017) ; G. falconii Ardito, Núñez-Resendiz, Dreckmann et Sentíes (2017) ; G. silviae Lyra, Gurgel, M.C.Oliveira et J.M.C. Nunes in Lyra et al. (2015).