Cryptonemia J.Agardh, 1842

Lectotype species: Cryptonemia lactuca J.Agardh

Currently accepted name for the type species: Cryptonemia palmetta (S.G.Gmelin) Woelkering, G.Furnari, Cormaci & McNeill

Original publication: Agardh, J.G. (1842). Algae maris Mediterranei et Adriatici, observationes in diagnosin specierum et dispositionem generum. pp. [i]-x, 1-164. Parisiis [Paris]: Apud Fortin, Masson et Cie.

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Type designated in: Pfeiffer, L. (1874). Nomenclator botanicus. Nominum ad finem anni 1858 publici juris factorum, classes, ordines, tribus, familias, divisiones, genera, subgenera vel sectiones designantium enumeratio alphabetica. Adjectis auctoribus, temporibus, locis systematicis apud varios, notis literariis atque etymologicis et synonymis. Vol. 2 pp. [1]-760. Cassellis [Cassel]: Sumptibus Theodori Fischeri [Theodor Fischer].

Description: Foliose, linear-lanceolate to broad and lobed, entire, proliferous or dissected into numerous cuneate, lanceolate or obovate lobes, occasionally laciniate, usually with distinct stalk or stipe, continuing as a midrib in some species, branched or unbranched, and with small discoid holdfast. Stalk perennial, with growth rings, in at least one species. Medulla filamentous, some cells refractive. Inner cortical cells stellate or club-shaped; other cortical cells subspherical to elliptical, progressively smaller toward cuticle. Rhizoids and secondary pit connections present. Female reproductive structures in ampullae, with up to four orders of branches. Carpogonial branch 2-celled, borne on primary or secondary ampullar filament. Hypogynous cell can bear a sterile filament. Auxiliary cell a basal or suprabasal cell of second or third order filament in a separate ampulla. A single gonimoblast initial produces a compact cystocarp of many small carposporangia. Small auxiliary fusion cell formed. Pericarp of elongated ampullar cells. Carpostome present. Spermatangia not described. Tetrasporophyte isomorphic. Tetrasporangia small, cruciate, presumably attached subbasally, scattered in cortex or confined to subapical sori.

Information contributed by: S.C. Lindstrom & J.A. Lewis. The most recent alteration to this page was made on 2019-09-06 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Woelkerling, W.J., Furnari, G., Cormaci, M. & McNeill, J. (2019). Nomenclatural re-assessments of the typification of Cryptonemia (Halymeniaceae, Rhodophyta) and the correct name of its type species . Notulae Algarum 113: 1-8, no figs.

Comments: Usually subtidal. Widely distributed, primarily in warm temperate to tropical waters.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 September 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 27 February 2024

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