Subfamily Chasmocarcininae Serène, 1964

Chasmocarcininae Serène, 1964a: 196; 1964b: 185.— Števčić 2005: 108; 2013: 186.—Ng et al. 2008: 27, 76 [in list].— Guinot et al. 2013: 111, 112, 113, 116, 118, 265.— Davie et al. 2015b: 946; 2015c: 1082.

Diagnosis. Antennular peduncle rounded to quadrate, distinctly swollen, completely filling fossa; normal aesthetascs. G1 typically longer than G2 (shorter in Hephthopelta s. str. and Tenagopelta n. gen.; G2 shorter than G 1 in Angustopelta n. gen. and Statommatia n. gen.). Vulvae distinct, moderately large, typically across most of thoracic sternite 6. Marine, from shallow water to depths of up to 1800 m.

Type genus. Chasmocarcinus Rathbun, 1898

Other genera included:

Amboplax n. gen.

Angustopelta n. gen.

Camatopsis Alcock & Anderson, 1899

Chasmocarcinops Alcock, 1900

Chinommatia n. gen.

Deltopelta n. gen.

Hephthopelta Alcock, 1899

Notopelta n. gen.

Statommatia n. gen.

Tenagopelta n. gen.

Fossil genera included (see Tavares 1992; Blow & Bailey 1992; De Grave et al. 2009: 32; Collins et al. 2009; Schweitzer et al. 2010; Guinot et al. 2013; Gašparič & Hyžný 2015; Jagt et al. 2015; Gašparič & Halásová 2015):

Collinsius Karasawa, 1993

Falconoplax Van Straelen, 1933

Gillcarcinus Collins & Morris, 1978

Mioplax Bittner, 1884

Orthakrolophos Schweitzer & Feldmann, 2001

Styrioplax Glaessner, 1928

A fossil species from the Miocene of Virginia, U.S.A., was attributed to Chasmocarcinus by Blow & Bailey (1992).