Russian acarologist Dr. N. G. Makarova, an expert in the taxonomy of halacarid mites, contributed to clarifying the halacarid fauna on the coasts of the Russian Far East. The majority of halacarid specimens used for taxonomic studies by Dr. Makarova are preserved in Russia. This time, nine microscopic glass slides containing type specimens of halacarid mites prepared by Dr. Makarova were relocated to the arachnid collection of the National Museum of Nature and Science in Tsukuba Japan. The visual states of these microscopic glass slides and the condition of each specimen mounted on them are recorded with newly allotted register numbers to help locate the types and check their conditions for future taxonomic studies.

Five crab species of three genera in the family Pilumnidae, viz., Heteropilumnus planus Ng and Lin, 2023, Pilumnus caerulescens A. Milne-Edwards, 1873, an unidentified Pilumnus species (P. aff. purpureus A. Milne-Edwards, 1873), P. neglectus Balss, 1933, and Viaderiana sentus Ng, Dai and Yang, 1997, are recorded from subtidal waters of Luzon, the Philippines, with taxonomic notes and photographs of all the species. Pilumnus caerulescens is compared with its morphologically close species, P. hirsutissimus Takeda and Komatsu, 2020, from the Japanese mainland. Of the recorded five species, H. planus, P. aff. purpureus, and V. sentus are new to the Philippine carcinological fauna.