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Family CALLIANIDEIDAE Kossman, 1880

Introduction

This small group of thalassinidean shrimps includes three genera found in the tropical eastern Atlantic and Indo-west Pacific Oceans. Only one species,Thomassinia aimsae Poore, 1997, has been described from Australia. Poore (1997) reviewed the family, and Poore (1994) provided a key to genera. Poore (2015) synonymised Callianideidae and Thomassiniidae.

 

Diagnosis

Firm-bodied or soft thalassinidean shrimps. Rostrum absent or present only as sharp spine. Linear thalassinica lateral to eyestalks, complete or incomplete. Cephalothorax usually broad, ending posteriorly as a median convexity not separate from posterolateral margins of carapace. Without anterolateral lobes on abdominal somite 1, anterodorsal tergite weak; no thickening of posterolateral carapace margins. Thoracic sternite 7 broad, visible between coxae of pereiopods 4 only as a flat plate. Coxae 4 flattened, immobile, without condyle with thoracic sternite 7. Abdominal somite 1 almost as long as abdominal somite 2 and with pleuron broadly rounded (rarely acute). Abdominal somite 2 pleuron not overlapping abdominal somite 1. Cephalothorax, rostrum, abdomen, telson and all limbs without armature. Anterior cephalothorax and at least abdominal somites 1 and 6, sometimes other, with weak lateral setal rows; lateral surfaces of propodi of pereiopods 2–4 sometimes with similar setal rows. Antenna 1 peduncle article 1 as long as 2 and 3. Antenna 2 with scaphocerite minute, barely articulating. Mandibular incisor toothed anteriorly and posteriorly, symmetrical. Maxilla 2 scaphognathite with one long setae extending into branchial chamber. Maxilliped 3 pediform, sometimes specialised; exopod present or absent. Pereiopods 1 unequal; merus ovate, with convex posterior margin; proximal part of propodus broad (about as long as wide); fingers shorter than proximal part. Pereiopod 2 chelate. Pereiopods 2–4 with flattened propodi. Pereiopods 3 and 4 propodi (or at least 3) bearing single distal spiniform seta on lower margin. Epipods linear, reduced anteriorly; podobranchs rudimentary or absent; two arthrobranchs various, present, reduced or lost; pleurobranchs absent. Male pleopod 1 absent. Appendix masculina fused to appendix interna (rarely separate). Pleopod 2 not modified, similar to pleopods 3–5; all with foliaceous rami, and well-developed appendix interna. Uropodal exopod without transverse suture; endopod more or less ovate. (After Poore 1997).

 

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)
08-May-2012 11-Aug-2015 MODIFIED
03-Jun-2010 MODIFIED