Desmarestia japonica subsp. angustifolia S.R. Lee

Lee, Sang-Rae & Lee, Eun-Young, 2018, Desmarestia japonica subsp. angustifolia (Desmarestiales, Phaeophyceae), a new subspecies from Korea, Phytotaxa 365 (1), pp. 89-95 : 94

Desmarestia japonica subsp. angustifolia S.R. Lee et E.-Y. Lee subsp. nov. ( Figs. 1 & 2 )

Differs from the typical D. japonica subspecies in that the maximum primary blade is more slender (width 0.6–2 mm, average 1.5 mm) and the maximum secondary blade is shorter (average 11 cm) and narrower (average width 0.7 cm); the stipe length averages 1 cm.

Holotype: NIBRAL 0000142337 , Gangwon-do , Gangneung-si, Gangmun-dong. Korea. 25 April 2013 by Hyung- Seop Kim in “Survey of indigenous biological resources of Korea ” project under MOE.

Molecular sequences of type material: cox 1 (GenBank accession MH 423500)

Phenology: Occurrence was recorded for subsp. angustifolia from April to May

Distribution and habitat ( Fig. 1 ): Korean D. japonica had a restricted distribution, mainly on the northeastern coast, mostly in subtidal habits ( Lee and Hwang 2010). Occurs sympatrically with D. japonica subsp. angustifolia and is restricted to Gangmun-dong, Gangneung-si, and Gangwon-do under seawater on a beach of the East Sea.

Etymology: The specific epithet refers to the slender blade morphology not to the ligulate blade.

Korean name: Jop-eun-git-san-mal (Jop-eun means narrow morphology)

Additional specimens examined (paratypes): NIBRAL 0000142338 , Gangwon-do , Gangneung-si, and Gangmun-dong. Korea 25 April 2013 ; NIBRAL 0000142339 , Gangwon-do , Gangneung-si, and Gangmun-dong. Korea 25 April 2013 ; NIBRAL 0000122789 , Gangwon-do , Gangdong-myen, Aninjin-ri, and Anin Beach. Korea 8 May 2009 .

Figures

FIGURE 1. Korean Desmarestia japonica collection sites: A, Goseong; B, Gangneung; C, Socheong Island.

FIGURE 2. Specimens of D. japonica from Korea. (A) Morphotype 1, D. japonica subsp. japonica (B) Morphotype 2, D. japonica subsp. angustifolia subsp. nov.