Seaweed systematics

Updated checklist of the benthic marine macroalgae of the Philippines

This work highlights (1) the rich seaweed biodiversity of the Philippines; (2) the need for re-evaluation of several previously reported seaweed taxa within the country; and, (3) the importance of natural history collections (i.e., herbaria) in safeguarding biodiversity information.

Notes on the taxonomy of the Philippine endemic Porphyra marcosii Cordero (Bangiaceae, Rhodophyta)

Proposal to relegate *Porphyra marcosii* as a later heterotypic synonym of *Phycocalidia vietnamensis* based on morphology, growth and development in culture, and ecology.

Status, morphology, and phylogenetic relationships of Iyengaria (Scytosiphonaceae, Phaeophyceae), a brown algal genus with a disjunct distribution in the Indian Ocean

A closer look into the taxonomy, distribution, and life history in culture of the poorly-known genus *Iyengaria*, with special reference to the generitype species *I. stellata*.

Proposal of Phycocalidia Santiañez & M.J.Wynne nom. nov. to replace Calidia L.-E.Yang & J.Brodie nom. illeg. (Bangiales, Rhodophyta)

*Calidia*, a newly proposed genus segregated from *Pyropia*, is renamed to *Phycocalidia*.

Establishment of Mimica gen. nov. to accommodate the anaxiferous species of the economically important red seaweed Eucheuma (Solieriaceae, Rhodophyta)

Transfer of *iota*-carrageenan-producing seaweeds from *Eucheuma* to *Mimica* gen. nov. The name alludes to the tendency of the type species *Mimica arnoldii* (=*Eucheuma arnoldii*) to imitate corals such as *Acropora*.

New records of Rosenvingea (Scytosiphonaceae, Phaeophyceae) from the Philippines

Two species of *Rosenvingea* (*R. nhatrangensis* and *R. australis*) are added to the seaweed flora of the Philippines.

Evidence for the treatment of Talarodictyon tilesii as an older taxonomic synonym of Hydroclathrus stephanosorus (Scytosiphonaceae, Phaeophyceae)

*Hydroclathrus stephanosorus* is synonymized to *Talarodictyon tilesii* and a new combined name *Hydroclathrus tilesii* is proposed.

Proposals to recognize Petalonia tenella comb. nov. and to resurrect Hapterophycus canaliculatus (Scytosiphonaceae, Phaeophyceae)

The taxonomy and classification of two new species of *Scytosiphon* (*S. canaliculatus* and *S. tenellus*) was revised based on life history …

Untangling nets: elucidating the diversity and phylogeny of the clathrate brown algal genus Hydroclathrus, with the description of a new genus Tronoella (Scytosiphonaceae, Phaeophyceae)

*Tronoella ryukyuana* gen. et. sp. nov. and *Hydroclathrus minutus* sp. nov. are described based on samples from southern Japan.

Taxonomic reassessment of the Indo-Pacific Scytosiphonaceae (Phaeophyceae): Hydroclathrus rapanuii sp. nov. and Chnoospora minima from Easter Island, with proposal of Dactylosiphon gen. nov. and Pseudochnoospora gen. nov.

*Hydroclathrus rapanuii* sp. nov. is newly described from Easter Island and the morpho-anatomy of *Chnoospora minima* is also redefined. Based on integrative approaches, new scytosiphonacean genera (i.e., *Dactylosiphon* gen. nov. and *Pseudochnoospora* gen. nov.) were also newly established.