Liagora mucosa M.Howe

• Region

  West Indies

• Country

  Bahamas

• Locality

  at West end of Little Inagua, on rocks at low-water mark

• Coordinates

  21.4956, -72.9992

• Coordinate Uncertainty (m)

  9721.57

• Georeferencing Method

  Georeferencing Quick Reference Guide, Version 2012. Located coordinates of geogr. center of Little Inagua Island. Measured from coord. to farthest extent of the island to find linear ext. (9710 m). Used MaNIS Georef. Calculator to find uncertainty (Bounded Area).

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

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6. Liagora mucosa M. A. Howe, sp. now

Thallus very soft and mucous, lightly and irregularly calcified, 5-20 cm.
long or high, irregularly monopodia!-, the main divisions paniculate or pyramido-
paniculate, the calcification beginning near the central axis and often extending
into the extra-peripheral mucus as mostly isolated flocculent granules, the sur-
face in dry state pulverulent, farinaceous, or sometimes minutely alveolate;
brandies for the most part progressively shorter, varying from rather sparse to
moderately crowded, tapering slightly to obtuse or subaeute apex, 0.32-0.6 mm.
broad towards apex (not including hairs) ; central axis in basal parts 0.7—1.25
mm. in diameter, lightly calcified, often denudate, in ultimate branches mostly
45—125 p, in diameter, readily visible, commonly reduced to three or four rather
easily separable filaments towards apex, the cells subcylindric 01* fusiform,
mostly 52—300/it X 11—75 u, descending rhizoids 3-8 /i in diameter few ii*
younger parts; fascicles of assimilatory lifarnents mostly 150-300 n long, 3 or
4 times diehotomous, intermingled in older parts with simple or subsimple fila-
ments 8—15 cells long, all beautifully moniliate or submoniliate in distal parts
at least, the distal or subdistal cells subglobose or bitruncate-subglobose to
ellipsoid or obovoid, 13-24 (j. long, 13-19 fx broad; apical hairs very numerous,
becoming 300-800 \x long, eylindrie-capitate, gelatinizing and leaving in con»
spicuous vestigia; dioicous; antheridia forming rather compact subglobose or
subhemispheric tufts 25—50 ix. broad, crowning ultimate and penultimate seg-
ments; carpogonial branch slightly curved, 15-28 ^ broad, of four cells (often
with conspicuous intercellular spaces), situated latero-terminally 011 the second
or third (rarely first or fourth) segment of the fascicle; cystocarp compact,
subhemispheric or subglobose, 100-200 /x broad, with a few rather inconspicuous
ascending involucral filaments; carpospores obovoid to pyriform-clavate, 25-
32 a* X 14-18 tx.

()<n more or less exposed rocks. at or near the low-water mark (also found
washed ashore), Little Inagua (lloirc .>7/7—type), Bose Island, Whale Cay, Ureat
Stirrup Cay, (ireat Bahama:—Florida (Key West. Mrs. O. .1. Hall. Mrs. F. A. Cur-
tins) : Barbados (Vickers, Aig. Barb. Mi—a coarse form). Liauora mucosa resembles
L. pedicel!ata so much in general habit that a microscopic examination is commonly
necessary for their distinction, yet it differs constantly in being dioicous, in the larger
tufts of antheridia. in the less distal and more lateral insertion of tlie more curved
carpogonial branch, and in the presence of a proper, even though rather inconspicu-
ous. ascending involucre for the cystocarp. It differs less constantly in the shorter,
more moniliform assimilatory filaments and in the more axial, less extra-peripheral
calcification.

From LUiyora pinnata llarv.. the species differs in being dioicous, in being less
calcified, in its greater mucosit.v, in its shorter, more moniliform assimilative fila-
ments. etc.	.

From Lhtyoru meyaiynn Borg., recently described from St. Croix, L. tinicosa dif-
fers in being much more flaccid and mucous, in being less calcified, in the long and
numerous apical hairs, in the fascicles of the more moniliate assimilatory filaments
being about one half as long, in the absence of rh|zoidal trichomes on the assimilatory
tilameiits (except for the decurrent rhizoid springing from the basal segment), in the
more curved, usually less stout, and more proximally situated carpogonial branches, etc.

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