Family PARACALLIOPIIDAE Barnard & Karaman, 1982

Yhi yindi

© Copyright from Barnard & Thomas 1991: fig. 1.

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Introduction

Paracalliopiid amphipods are a small group of Southern Hemisphere marine, brackish and freshwater species. They are reported from Australia, New Caledonia, Philippines and Fiji. There are three known genera and about 10 species.

Paracalliopiids are considered to be related to exoedicerotid and oedicerotid amphipods (Barnard & Karaman 1991). Marine species are often found in intertidal rock pools and brackish water species occur in mangroves (Myers 1985; Barnard & Drummond 1992). McGrouther (1983) described the feeding behaviour of Paracalliope australis (Haswell). Nothing is known of life histories in this group. Barnard & Drummond (1984, 1992) thoroughly documented the family in Australian waters. Barnard & Karaman (1991) present a key to all genera.

Diagnosis

Head as long as deep or deeper than long; anteroventral margin straight and not excavate; anteroventral corner subquadrate; rostrum short or moderate; eyes round. Body laterally compressed; smooth. Antenna 1 shorter than, subequal to, or longer than antenna 2; peduncle with many or sparse robust or slender setae; peduncular article 1 subequal to, or longer than article 2; article 2 subequal to, or longer than article 3; article 3 shorter than or subequal to article 1; accessory flagellum absent; primary flagellum 5- or more articulate; callynophore absent. Antenna 2 short or medium length; peduncle with many or sparse robust or slender setae; flagellum shorter or longer than peduncle; 5- or more articulate; calceoli present or absent. Mandible incisor dentate; lacinia mobilis present on both sides; molar fully triturating; palp present or absent. Maxilla 1 inner plate strongly setose along medial margin or weakly setose apically. Maxilliped inner plates well developed; outer plates small. Coxae 1–4 longer than broad, overlapping. Gnathopod 1 sexually dimorphic; smaller (or weaker) than or subequal to gnathopod 2; simple or subchelate; coxa smaller or subequal to coxa 2; carpus shorter than or subequal to propodus, slightly or not produced along posterior margin of propodus. Gnathopod 2 sexually dimorphic; simple or subchelate; coxa smaller than or subequal to but not hidden by coxa 3; ischium short; carpus short, shorter than or subequal to propodus, slightly or not produced along posterior margin of propodus. Pereopod 3 coxa longer than broad; carpus shorter than, subequal to, or longer than propodus, not produced. Pereopod 4 coxa smaller or larger than coxa 3, with or without posteroventral lobe; carpus shorter or longer than propodus, not produced. Pereopods 5–7 with many marginal slender setae and few or no robust setae or with few robust or slender setae. Pereopod 5 shorter than pereopod 6; coxa subequal to, or larger than coxa 4, without posterior lobe; basis expanded, subrectangular or subovate, with posteroventral lobe; carpus linear. Pereopod 6 shorter than pereopod 7; basis expanded. Pereopod 7 longer than pereopod 5 or immensely long; different in structure to pereopod 6; basis expanded, with broad posteroventral lobe or shield-like. Epimeron 2 setose. Urosomites 1 free, 2 and 3 coalesced. Uropods 1–2 apices of rami without robust setae. Uropod 3 biramous; peduncle short or long; rami lanceolate; outer ramus shorter than, subequal to, or longer than peduncle; inner ramus not apically setose. Telson laminar; entire; longer than broad; dorsal and apical robust setae absent.

General References

Barnard, J.L. & Drummond, M.M. 1984. A new paracalliopiid, Katocalliope kutyeri gen. et sp. nov. (Crustacea: Amphipoda) from Queensland. Proceedings of the Royal Society of Victoria 96(3): 147-153

Barnard, J.L. & Drummond, M.M. 1992. Paracalliope, a genus of Australian shorelines (Crustacea: Amphipoda: Paracalliopiidae). Memoirs of Museum Victoria 53(1): 1-29

Barnard, J.L. & Karaman, G.S. 1982. Classificatory revisions in gammaridean Amphipoda (Crustacea), Part 2. Proceedings of the Biological Society of Washington 95(1): 167-187

Barnard, J.L. & Karaman, G.S. 1991. The families and genera of marine gammaridean Amphipoda (except marine gammaroids). Records of the Australian Museum, Supplement 13: 1-866

Barnard, J.L. & Thomas, J.D. 1991. Yhi yindi, a new genus and species of Paracalliopiidae (Crustacea: Amphipoda) from the Great Barrier Reef. Memoirs of Museum Victoria 52(2): 283-289

McGrouther, M.A. 1983. Comparison of feeding mechanisms in two intertidal gammarideans, Hyale rupicola (Haswell) and Paracalliope australis (Haswell) (Crustacea: Amphipoda). Australian Journal of Marine and Freshwater Research 34: 717-726

Myers, A.A. 1985. Shallow-water, coral reef and mangrove Amphipoda (Gammaridea) of Fiji. Records of the Australian Museum, Supplement 5: 1-143

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