taxonID	type	description	language	source
03C5854FFF92722DBDD8F944FDB1CB3E.taxon	description	(Figure 2 A – O). Description Thalli tightly adherent to and following the contours of dead-coral substrata (Figure 2 A, B), fronds ovoid to irregularly lobed in surface outline (Figure 2 C – E), to 3 – 4 mm in diameter, green khaki-gray (Figure 2 A, B, D) or reddishbrown (Figure 2 C) in color, consisting of multiple layers of imbricated, marginally meristematic encrusting blades (Figure 2 F, G) cemented to the substratum and to each other (Figure 2 C) across the whole of the undersurfaces and without anchoring rhizoids; stack of blades to 1 mm thick. Blades extend peripherally from a continuous marginal meristem (Figure 3 E, H – J), 45.7 ± 5.1 µm thick, bilayered, cells of the epidermal and hypodermal layers 11.3 ± 2.4 µm and 34.3 ± 3.9 µm thick respectively. Epidermal cells rectilinear in surface (Figure 2 H – K), cross-sectional (Figure 2 N). Hypodermal cells cuboidal in cross-section (Figure 2 N), rectilinear or in long section (Figure 2 O), 32.3 ± 3.2 µm in width by 59.7 ± 3.9 µm in length. Juvenile hairs (Figure 2 L, M) clustered. Oogonia, antheridia and sporangia unknown. Differing from N. imbricata by (1) the distinctive radial development of surface blades from points of origin and (2) the 4 % difference in rbc L nucleotide sequences [PC 0063019 (IRD 11128) and IRD 11129]. Ethymology The epithet “ yhaga ” comes from the word “ Yhag ”, which is the general name for brown algae in Bel language that is spoken by the villages surrounding Madang Lagoon and in other areas in Madang province.	en	Vieira, Christophe, De Clerck, Olivier, Payri, Claude E. (2016): First report of the Hawaiian genus Newhousia (Dictyotales, Phaeophyceae) from Madang, Papua New Guinea and description of the new species N. yhaga sp. nov. Botanica Marina (Warsaw, Poland) 59 (1): 31-37, DOI: 10.1515/bot-2015-0095, URL: http://dx.doi.org/10.1515/bot-2015-0095
03C5854FFF92722DBDD8F944FDB1CB3E.taxon	materials_examined	Holotype PC 0063019 (IRD 11128), leg. C. Payri (13. xi. 2012). Figure 2 A, B. Type locality Paeowa Island, Madang Lagoon, Papua New Guinea (05.1745 ° S; 145.833 ° E), thalli on dead coral at - 10 m.	en	Vieira, Christophe, De Clerck, Olivier, Payri, Claude E. (2016): First report of the Hawaiian genus Newhousia (Dictyotales, Phaeophyceae) from Madang, Papua New Guinea and description of the new species N. yhaga sp. nov. Botanica Marina (Warsaw, Poland) 59 (1): 31-37, DOI: 10.1515/bot-2015-0095, URL: http://dx.doi.org/10.1515/bot-2015-0095
03C5854FFF92722DBDD8F944FDB1CB3E.taxon	distribution	Distribution Endemic so far to the northeastern shore of Papua New Guinea (Figure 1). Habitat Thalli consisting of multiple layers of tightly adhering crusts several cm 2 in surface area and cemented to hard substrata, intermixed with encrusting coralline algae (Figure 2 B, D) at upper levels of inner and outer reef slopes from low intertidal to depths of 10 m in areas of strong to moderate water movement. Specimens examined 1) Paeowa Island (PCT 29; 5.1745 ° S; 145.833 ° E), (C. Payri, 13. xi. 2012; IRD 11128). Malamal Anchorage, Madang, Papua New Guinea (PCT 12; - 5.11995 ° S; 145.823 ° E), Madang, Papua New Guinea, 18 November 2012, leg. C. Payri (C. Payri, 18. xi. 2012; IRD 11129).	en	Vieira, Christophe, De Clerck, Olivier, Payri, Claude E. (2016): First report of the Hawaiian genus Newhousia (Dictyotales, Phaeophyceae) from Madang, Papua New Guinea and description of the new species N. yhaga sp. nov. Botanica Marina (Warsaw, Poland) 59 (1): 31-37, DOI: 10.1515/bot-2015-0095, URL: http://dx.doi.org/10.1515/bot-2015-0095
