New record of three economic Hypnea species (Gigartinales) in Korea

Table 1 Comparison of morphological features found in the three Hypnea species

Characters	Species
Characters	H. yamadae	H. cenomyce	H. nidulans
Habitat	Epilithic in intertidal to subtidal	Epilithic in intertidal	Epilithic or occasionally epiphytic in intertidal
Thalli	Terete to compressed	Terete	Terete to subterete
Size (cm)	9–37	4–15	2–10
Branching type	Irregular, alternate or dichotomous	Alternate or irregular	Alternate to spiral, irregular
Branchlets	A few	Several (or abundant)	Numerous
Basal constriction of branchlets	Absent	Present	Present
Hooked branchlets	Absent or rarely present	Absent	Absent
Lenticular thickening	Absent	Often or occasionally present	Present
Size of tetrasporangia (μm)	–	50 × 25	12 × 58
References	Tanaka 1960; Yamagishi and Masuda 1997; the present study	Chiang 1997; the present study	Chiang 1997; Yamagishi and Masuda 1997; the present study

ISSN: 2234-1757