UC specimens and range limits for Haplogloia andersonii

• Blue markers: specimen records
• Yellow marker: type locality, if present
• Red markers: endpoints of range from literature

View map from the Consortium of Pacific Northwest Herbaria

Notes: From the Gulf of Alaska through Pacific Mexico.

Status: Tan & Druehl (1993) obtained a partial 18S RNA sequence but their conclusions were provisional. This species needs re-evaluation.

Habitat: Low intertidal pools to subtidal

Life History: Alternation of heteromorphic phases, with macroscopic sporophytes and microscopic discoid gametophytes that initially may be filamentous; isogametes produced from surface cells, unfused gametes recycling the gametophytic phase (Wynne 1969).

Search Sequences in GenBank

Illustration from DeCew's Guide to the Seaweeds of British Columbia, Washington, Oregon, and Northern California

Haplogloia Levring 1939

Thalli of sporangial plants irregularly branched; branches cylindrical, soft and gelatinous, with single axial filament surrounded by compact medullary layer of elongate, colorless cells forming longitudinal filaments. Cortex of unbranched, pigmented, anticlinal filaments and numerous, much longer, unbranched, evanescent colored hairs; true endogenous hairs absent. Chloroplasts band-shaped, 1 to many per cell, disappearing with age. Unangia ovoid, at base of cortical filaments; plurangia lacking. Gametangial plants compact microscopic disks.

Haplogloia andersonii ( Farl.) Levr.

Mesogloia andersonii Farlow 1889: 9. Haplogloia andersonii (Farl.) Levring 1939: 50; Smith 1944: 117; Wynne 1969a: 13. Myriogloia andersonii Setchell & Gardner 1925: 556.

Thalli of sporangial plants to 25-40 cm tall, mostly light tan, frequently with several erect, irregularly branched axes from a common base; branches, including deciduous hairs, mostly 2-3 mm diam.; older axes commonly hollow; cortical filaments of 5-9 cells, outwardly larger and frequently curved at apex; unangia 24-28 µm long, 10-16 µm diam.

Spring annual on rocks, lower intertidal in tidepools to upper subtidal, Sitka, Alaska, to Baja Calif. and Gulf of Calif.; occasional to locally abundant in Calif. (Humboldt Co. to San Diego). Type locality: Santa Cruz, Calif.

Excerpt from Abbott, I. A., & Hollenberg, G. J. (1976). Marine algae of California. Stanford University Press, Stanford, California. xii [xiii] + 827 pp., 701 figs.