Calypogeia arguta Nees et Mont., Naturgesch. Eur. Leberm. 3: 24. 1838.

Bakalin, Vadim A., Klimova, Ksenia G. & Nguyen, Van Sinh, 2020, A review of Calypogeia (Marchantiophyta) in the eastern Sino-Himalaya and Meta-Himalaya based mostly on types, PhytoKeys 153, pp. 111-154 : 111

Calypogeia arguta Nees et Mont., Naturgesch. Eur. Leberm. 3: 24. 1838. Figures 2F , 3J

= Calypogeia pusilla Steph. Species Hepaticarum 6: 450. 1924. Type: India. India Orientalis: Madura A. Vella 1910 (Lectotype (designated here): G [G00067728/10974!].

Type.

Montagne (holotype: STR [(n. 163)!]).

Remarks.

The species is described in “südlichen Frankreich, auf der Erde" ( Nees 1838: 24), has generally suboceanic-Mediterranean ( Damsholt 2002: 460) distribution, is widely distributed in Mediterranean areas in southern Europe (hardly spreading northward to Nordic countries) and North Africa, widely penetrates Asia along areas of the former Tethys Ocean surroundings and extends eastward to New Guinea; within North America, it is substituted by Calypogeia sullivantii Austin, a morphologically very similar taxon. In the genetic sense, this polymorphous taxon probably includes several cryptic or semicryptic species. Calypogeia pusilla , described from Indian Madura, represents in morphological respects the only depauperate form of typical C. arguta .

Within East Asia, Calypogeia arguta is recorded from Assam, Sikkim, ( Robinson 1964; Bapna and Kachroo 2000), eastern Nepal ( Noguchi et al. 1966), several localities in China, namely, Guangxi ( Zhu and So 2003), Hong Kong ( Zhang and Lin 1997), Jiangxi ( Fang et al. 1998), Jiangsu, Guangdong, Hainan, Taiwan ( Piippo 1990), Liaoning, Shaanxi, Shandong, Hubei, Yunnan, Henan, Anhui, Zhejiang, Hunan, Fujian, Guangxi, Macau (http://www.catalogueoflife.org/annual-checklist/2019/), and Guizhou Provinces ( Bakalin et al. 2015). At the northern edge of East Asia the species is recorded from Kuril Islands ( Bakalin et al. 2009), Japan and Korean Peninsula (http://www.catalogueoflife.org/annual-checklist/2019/). In Southeast Asia it is known from Vietnam ( Shu et al. 2017), Thailand, Andaman Islands, Nicobar Is, Malaya, Borneo, Sulawesi, Java (http://www.catalogueoflife.org/annual-checklist/2019/).

Figures

Figure 2. Calypogeia aeruginosa Mitt.: A plant habit, fragment, ventral view Calypogeia angusta Steph.: B leaf C underleaf Calypogeia apiculata (Steph.) Steph.: D plant habit, fragment, ventral view E leaf apex Calypogeia arguta Nees et Mont.: F plant habit, fragment, ventral view Calypogeia cordistipula (Steph.) Steph.: G underleaf H plant habit, fragment, ventral view I leaf J leaf margin cells K leaf middle cells. Scale bars: 1 mm (A, F); 500 µm (B, D, G); 200 µm (C, G); 50 µm (E, J, K); 2 (N); 2 mm (H). A from Isotype G 00064244 / 5286; B, C from Lectotype G 00067716; D, E Holotype G 00061103; F Holotype STR (n. 163); G-K from Lectotype G 00061105 / 10811.

Figure 3. Calypogeia angusta Steph.: A plant habit, fragment, ventral view B, C, D underleaves E, F, G leaves Calypogeia apiculata (Steph.) Steph.: H plant habit, fragment, ventral view I plant habit, fragment, ventral view Calypogeia arguta Nees et Mont.: J plant habit, fragment, ventral view Calypogeia cordistipula (Steph.) Steph.: K plant habit, fragment, dorsal view L plant habit, fragment, ventral view M, N leaves O, P underleaves. A-G from Lectotype G 00067716; H, I lectotype G 00061103; J holotype STR (n. 163); K-P from Lectotype G 00061105 / 10811.