Figure 12. Guard papillae of Vignadula (A–D) and Xenostrobus (E–G) species on the posterior region of the inner mantle margin attached to LV. All animals shown preserved in ethanol. A, Vignadula atrata, SL = 11.4 mm, Toishi-ko, Nagasaki, Japan. B, Vignadula mangle comb. nov., SL = 13.5 mm, Kampong Bako, Kuching, Sarawak. C, Vignadula kuraburiensis sp. nov., SL = 13.2 mm, Kuraburi, Phangnga, Thailand. D, V. kuraburiensis sp. nov., SL = 8.8 mm, Ban Baen, Ranong, Thailand. E, Xenostrobus inconstans, SL = 22.7 mm, Dunnalley Bay, Tasmania, Australia (TMAG E21829). F, Xenostrobus securis, SL = 24.8 mm, Swan River, Perth, WA, Australia. G, Xenostrobus pulex, SL = 13.1 mm, Cottesloe, Perth, WA, Australia. Scale bars: 1 mm in A–C, E–G; 500 µm in D.

Published as part of Tan, Koh Siang, Tan, Samuel Hui Ming, Sanpanich, Kitithorn, Duangdee, Teerapong & Ambarwati, Reni, 2022, Xenostrobus or Vignadula (Bivalvia: Mytilidae)? A taxonomic re-evaluation of small black mussels inhabiting the upper intertidal zone of the estuaries of Southeast Asia, pp. 316-345 in Zoological Journal of the Linnean Society 196 on page 336, DOI: 10.1093/zoolinnean/zlac031, http://zenodo.org/record/7035193