A revision of "blanket-hermit crabs" of the genus Henderson, 1888, with the description of a new genus and five new species (Crustacea, Anomura, Diogenidae).

For 130 years the diogenid genus Henderson, 1888 was considered monotypic for an unusual species, Henderson, 1888, described from the Philippines and seldom reported since. Although scantly studied, this species is known to live in striking symbiosis with a colonial sea anemone that the hermit can stretch back and forth like a blanket over its cephalic shield and part of cephalothoracic appendages, and thus the common name "blanket-crab". During a study of paguroid collections obtained during recent French-sponsored biodiversity campaigns in the Indo-West Pacific, numerous specimens assignable to were encountered.

Additions to the Indonesian crab fauna of the genus Mariaplax Rahayu Ng, 2014, and notes on Hexapus timika Rahayu Ng, 2014 (Crustacea, Decapoda, Brachyura, Hexapodidae).

Hexapus timika Rahayu Ng, 2014 is redescribed based on newly collected male and female specimens from Papua, Indonesia. Three new species from Jakarta Bay and Sunda Strait, Indonesia, are added to the genus Mariaplax, the richest genus in the family Hexapodidae, hitherto having 14 species. Mariaplax pitrai n.

Notes on Hexapodidae (Crustacea, Brachyura) from Indonesia and Malaysia, with description of a new species of Mariaplax Rahayu & Ng, 2014, from Lombok, Indonesia.

The male of Hexapinus latipes (De Haan, 1835), so far known only from female specimens, is described based on the material reported by De Man (1888) as "Hexapus sexpes". Material referred to "Hexapus sexpes" by Tesch (1918) is shown instead to belong to Hexapinus simplex Rahayu & Ng, 2014, and Hexapinus latus Rahayu & Ng, 2014, while his "Hexaplax megalops Doflein, 1904" belongs to Hexaplax aurantium Rahayu & Ng, 2014. A new species, Mariaplax aspera n.

Pagurus Asper H. Milne Edwards, 1848, a subjective synonym of Clibanarius longitarsus (De Haan, 1849) and reversal of precedence (Crustacea: Decapoda: Anomura: Diogenidae).

The species-group name Pagurus longitarsus was proposed by De Haan (1849: 211, pl. 50, fig. 3) for a species of hermit crab collected from Japan (see Yamaguchi & Baba 1993: 272, 273).

Revision of the family Acidopsidae Števčić, 2005, and the systematic position of Typhlocarcinodes Alcock, 1900, Caecopilumnus Borradaile, 1902, and Raoulia Ng, 1987, with descriptions of two new genera and five new species (Crustacea: Brachyura: Goneplacoidea).

The family Acidopsidae Števčić, 2005, is revised; and two subfamilies are recognised. The Acidopsinae Števčić, 2005, is characterised by the coxal male opening, a quadrate basal antennal article and vulvae arranged near the median longitudinal thoracic sternal groove. Three genera are included in the Acidopsinae: Acidops Stimpson, 1871 (with two species), Parapilumnus Kossmann, 1877 (with two species) and Crinitocinus gen.