Ulvophyceae

Tsuda, Roy T. & Giuseffi, Usa. Louise, 2015, Marine Benthic Algae from Seamounts along the Mariana Islands, Western Pacific, Micronesica 2015 (4), pp. 1-19 : 10-12

Class Ulvophyceae

ORDER BYOPSIDALES

FAMILY BRYOPSIDACEAE

Bryopsis hypnoides J. V. Lamouroux ; Abbott & Huisman 2004: 96, fig. 33A.

Specimens examined. PATHFINDER REEF: PAT-01-05 (BISH 743255).

FAMILY CAULERPACEAE

Caulerpa ambigua Okamura ; Eubank 1946: 410, pl. 22, figs. 2a and 2b; Draisma et al. 2014: 1031.

Specimens examined. STINGRAY SHOALS: STI-01-03 (BISH 720880 on Chondria sp. fragment), STI-02-03 (BISH 720888 on Chondria sp. fragment).

Caulerpa chemnitzia (Esper) J. V. Lamouroux ; Kraft 2007: 171, figs. 64A‒C as Caulerpa peltata .

[= Caulerpa peltata J.V. Lamouroux , see Belton et al. 2014]

Specimens examined. PATHFINDER REEF: PAT-01-03 (BISH 722358), PAT-01-05 (BISH 743253).

Caulerpa racemosa (Forsskål) J. Agardh ; Eubank 1946: 419.

Specimen is a peltate form of C. racemosa .

Specimens examined. PATHFINDER REEF: PAT-01-05 (BISH 743251).

Caulerpa webbiana Montagne ; Eubank 1946: 415, figs. 1a‒f, 2c.

Specimen consists of 4 mm high whorled uprights from a prostrate rhizome. Draisma et al. (2014) showed that Caulerpa elongata Weber-van Bosse and C. webbiana are clearly not conspecific.

Specimens examined. PATHFINDER REEF: PAT-01-05 (BISH 743252). ARAKANE REEF: ARA-01-05 (BISH 763261).

FAMILY DICHOTOMOSIPHONACEAE

Avrainvillea lacerata J. Agardh ; Olsen-Stojkovich 1985: 33, fig. 18, pl. 6b.

Specimens examined. ZEALANDIA BANK: ZEA-01-03 (BISH 722347).

FAMILY HALIMEDACEAE

Halimeda fragilis W. R. Taylor ; Taylor 1950: 88, pl. 48 (fig. 2).

Specimens appear chalky with nodal medullary filaments unfused.

Specimens examined. PATHFINDER REEF: PAT-02-05 (BISH 743267).

Halimeda gracilis Harvey ex J. Agardh ; Taylor 1950: 144, fig. 44.

Specimens examined. ARAKANE REEF: ARA-01-03 (BISH 722405), ARA-02-03 (BISH 722422).

Halimeda opuntia (Linnaeus) J. V. Lamouroux ; Hillis-Colinvaux 1980: 110, figs. 17, 20.

Specimens examined. ZEALANDIA BANK: ZEA-01-03 (BISH 722337), ZEA-02-03 (BISH 722348). ZEA-02-05 (BISH 743234, 743235). ARAKANE REEF. ARA-01-05 (BISH 763243, 763263), ARA-02-05 (BISH 763264).

Halimeda taenicola W. R. Taylor ; Taylor 1950: 86, pl. 46 (fig. 1).

Specimens examined. ZEALANDIA BANK: ZEA-01-03 (BISH 722336), ZEA-02-03 (BISH 722349). PATHFINDER REEF: PAT-01-03 (BISH 722355), PAT-02-03 (BISH 722374, 722388), PAT-01-05 (BISH 743239), PAT-02-05 (BISH 743258). ARAKANE REEF: ARA-01-03 (BISH 722404), ARA-02-03 (BISH 722420), ARA-02-05 (BISH 763282).

Halimeda cf. tuna (J. Ellis & Solander) J. V. Lamouroux ; Hillis-Colinvaux 1980: 122, figs. 17, 20, 34.

Although the distribution of Halimeda tuna seems to be restricted to the Mediterranean Sea and the Atlantic Ocean ( Verbruggen et al. 2005), this single specimen has been tentataively placed under H. tuna since morphological and anatomical characters are similar to characters noted by Taylor (1950) and Hillis-Colinvaux (1980). The morphology of BISH 763271 differs from H. cuneata Hering where Kojima et al. (2015) relegated previously identified specimens of H. tuna in Japanese waters. Molecular analysis of more Pacific “ H. tuna ” should be undertaken to resolve this situation; Pacific “ H. tuna ” may be a cryptic new species.

Specimens examined. ARAKANE REEF. ARA-02-05 (BISH 763271).

FAMILY RHIPILIACEAE

Rhipilia orientalis A. Gepp & E. Gepp ; Taylor 1950: 72, pl. 36 (fig. 1).

Specimens examined. ARAKANE REEF: ARA-02-03 (BISH 722419).

FAMILY UDOTEACEAE

Chlorodesmis caespitosa J. Agardh ; Ducker 1967: 157, pls. 3, 12, 13, 14 and 19.

Specimens examined. PATHFINDER REEF: PAT-01-03 (BISH 722362), PAT-02-03 (BISH 722378), PAT-02-05 (BISH 743248, 743269).

Rhipidosiphon javensis Montagne ; Abbott & Huisman 2004: 140, figs. 52C‒D.

Morphologically, the specimens resemble the flabellate form of Tydemania expeditionis Weber-van Bosse. The siphons which comprise the blades of R. javensis are, however, unequally constricted above each dichotomy.

Specimens examined. PATHFINDER REEF: PAT-01-05 (BISH 743247), PAT-02-05 (BISH 743259). ARAKANE REEF: ARA-02-05 (BISH 763284, 763287, 764138).

ORDER CLADOPHORALES

FAMILY ANADYOMENACEAE

Microdictyon okamurae Setchell ; N’Yeurt & Payri 2007: 11, figs. 10‒12.

Specimen consists of cells 460‒540 µm diam and 400‒1100 µm long with crenulate apical attachment sites. BISH 763242 was covered with Calothrix confervicola .

Specimens examined. ARAKANE REEF: ARA-01-03 (BISH 722400), ARA-02-03 (BISH 722413), ARA-01-05 (BISH 763242), ARA-02-05 (BISH 763281).

Microdictyon sp.

Stellate branching patterns are present in few areas. Cells are mostly oblong, 880 µm long and 320‒400 µm diam. Branch attachment is by annular wall thickening. The specimens may represent a new species of Microdictyon .

Specimens examined. ARAKANE REEF: ARA-01-05 (BISH 763248, 763259), ARA-02- 05 (BISH 763269, 763273).

FAMILY BOODLEACEAE

Boodlea composita (Harvey) F. Brand; N’Yeurt & Payri 2007: 23, figs. 31‒34.

Specimen is 3 mm long with main branch up to 200 µm diam and branches up to 96 µm diam.

Specimens examined. ARAKANE REEF: ARA-01-05 (BISH 763257).

Boodlea vanbosseae Reinbold ; Dawson 1956: 29, fig. 6.

BISH 720891 is a young filament which is 1 cm long and 96‒120 µm diam with conspicuous rhizoids, up to 240 µm long with fimbriate terminal apices.

Specimens examined. SUPPLY REEF: SUP-01-03 (BISH 720891 on Lobophora sp. ).

Phyllodictyon anastomosans (Harvey) Kraft & M. J. Wynne ; Abbott & Huisman 2004: 63, figs. 16A‒B.

Specimen is immature but possesses opposite branching pattern.

Specimens examined. ARAKANE REEF: ARA-02-05 (BISH 763291).

FAMILY CLADOPHORACEAE

Cladophora cf. flexuosa (O. F. Müller) Kützing ; Abbott & Huisman 2004: 72, fig. 20C.

Specimen is 2 mm long and resembles the basal filament of C. flexuosa .

Specimens examined. ARAKANE REEF: ARA-02-05 (BISH 763278).

Cladophora cf. vagabunda (Linnaeus) C. Hoek ; Abbott & Huisman 2004: 79, figs. 24A‒D.

Filaments are up to 10 mm tall and represent immature specimens.

Specimens examined. ARAKANE REEF: ARA-01-03 (BISH 722402), ARA-02-03 (BISH 722411).

FAMILY PITHOPHORACEAE

Dictyosphaeria cavernosa (Forsskål) Børgesen ; Egerod 1952: 350, figs. 1b‒f, 2f, 2g.

Specimens examined. SUPPLY REEF: SUP-01-03 (BISH 720892). PATHFINDER REEF: PAT-01-05 (BISH 743257). ARAKANE REEF: ARA-02-03 (BISH 722421), ARA-01-05 (BISH 763249), ARA-02-05 (BISH 763265, 764136).

Dictyosphaeria versluysii Weber-van Bosse; Egerod 1952, 351, figs. 1a, 2h‒k.

Specimens examined. ZEALANDIA BANK: ZEA-01-03 (BISH 722335), ZEA-02-03 (BISH 722351). PATHFINDER REEF: PAT-01-03 (BISH 722356).

FAMILY VALONIACEAE

Valonia ventricosa J. Agardh ; Kraft 2007: 121, figs. 51A‒D.

[= Ventricaria ventricosa (J. Agardh) Olsen & J. A. West]

Specimens examined. SUPPLY REEF: SUP-01-03 (BISH 720893). ZEALANDIA BANK: ZEA-01-03 (BISH 722334), ZEA-02-03 (BISH 722350). PATHFINDER REEF: PAT-01-03 (BISH 722357), PAT-02-03 (BISH 722389), PAT-02-05 (BISH 743270). ARAKANE REEF: ARA-02-03 (BISH 722416).