Australian Isopoda: Families

S.J. Keable, G.C.B. Poore & G.D.F. Wilson


Santiidae Wilson, 1987

Santiidae Wilson, 1987: Fig. 5B. -Kensley & Schotte, 1989: 98. -Winkler, 1993: 111. -Roman & Dalens, 1999: 252.

Santidae. -Kussakin, 1988: 228.

Description. Body. Body shape without loss or gross modification of appendages on one side of the body; in dorsal view without peduncular articles of antenna 1 or 2 contiguous with coxal margins.

Head. Head not capable of lateral rotation (laterally encompassed, abutting or fused to pereonite 1). Antenna 1 inserting on head anteriorly and/or dorsally to antenna 2, minute or well developed; not as follows: reduced to 2 articles with second article expanded and scalloped. Antenna 2 well developed; peduncle article 3 subequal in length and colinear to other proximal peduncle articles. Mouthparts not forming suctorial cone or proboscis. Mandible not projecting anteriorly and together forceps-like; palp present, or absent.

Pereon. Pereonites 6-7 pereonite 7 distinct dorsally, free. Coxae not extending ventrally and laterally to overhang the coxa-basis articulation of the pereopods. Pereopods 6-7 pairs readily apparent; 1-3 or 1-7 not prehensile. Pereopod 1 subchelate, dactylus and propodus opposing each other. Pereopods 5-7 without flattened setose articles andor dactyls modified or absent.

Pleon / Pleotelson. Pleonites and pleotelson with pleonites 3-5 fused without lateral sutures, pleotelson fused with pleonites 3-5, pleonites 1 and 2 free but may be only small rings or cuticular bars visible ventrally. Pleopods 5 pairs present (males), or 4 pairs present (females); pleopods 1-2 opercular or not opercular in males, pleopod 2 fused and usually opercular in females. Pleopod 2 of males consisting of an enlarged peduncle, a geniculate endopod and a small muscular exopod. Uropods positioned distally on pleotelson; distinct from pleopods, not forming operculum over pleopodal chamber (although may be folded ventrally below pleotelson). Peduncle not forming an elongate clavate article with rami reduced or absent; distinct, often elongate. Endopod not claw-like (acute and recurved) andor posteroventral in position. Exopod not folded dorsally over pleotelson.

Remarks. See Martin & Davis (2001) regarding authorship of the family name.

Distribution and generic composition. See Kensley et al. (1996).



Cite this publication as: 'S.J. Keable, G.C.B. Poore & G.D.F. Wilson (2002 onwards). 'Australian Isopoda: Families. Version: 2 October 2002. http://crustacea.net'.