Australian Biological Resources Study

Australian Faunal Directory

<em>Mictyris longicarpus</em> [from McNeill 1926: pl. 9 fig. 1]

Mictyris longicarpus [from McNeill 1926: pl. 9 fig. 1]


Regional Maps

Family MICTYRIDAE Dana, 1851

Compiler and date details

May 2012 - Peter Davie, Queensland Museum, Brisbane



The brightly coloured mictyrids are perhaps the best known of Australian intertidal crabs because of their remarkable habit of forming huge armies that swarm over intertidal muddy-sand flats. This behaviour has led to their popular name of 'Soldier Crabs'. The family comprises a single genus Mictyris, confined to the central Indo-west Pacific region, with five described species from Australia (see McNeill 1926; Takeda 1978). Two species from the Northern Territory and Western Australia, first identified as new by Davie (1982, 1985), were described recently.



Carapace deep, globular, longer than wide; dorsal surface with cervical and cardiobranchial grooves well defined; eyes exposed, orbits obsolescent, small post-ocular spine. Interantennular septum very narrow; antennular flagellum rudimentary, folding almost vertically. Antennae small. Buccal cavern large, oval; completely closed by convex, expanded, foliaceous third maxillipeds. Third maxilliped with palp articulating at antero-external angle of merus; exopod slender, concealed, without flagellum. Chelipeds elongate, slender, subequal; similar in males and females. Walking legs slender. Tympana not present on meri of walking legs or on sternum. Male abdomen with all segments distinct, broad, similar to female; base entirely covering sternum. Male and female genital openings sternal.


History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
04-Jun-2012 04-Jun-2012 MOVED
10-May-2012 10-May-2012 MODIFIED
12-Feb-2010 (import)