Paracalliope Stebbing, 1899

Ariyama, Hiroyuki, 2021, Two Species of Paracalliopiidae from the Ryukyu Archipelago in Japan, with the Description of a New Species (Crustacea: Amphipoda), Species Diversity 26, pp. 79-91 : 87-88

Genus Paracalliope Stebbing, 1899

[Japanese name: Genkotsu-yokoebi-zoku]

Paracalliope Stebbing, 1899: 210 ; Barnard 1972: 70; Barnard and Karaman 1982: 181; Barnard and Karaman 1991: 571;

Barnard and Drummond 1992: 2.

Paroediceropsis Fearn-Wannan, 1968: 50 .

Type species. Calliope fluviatilis Thomson, 1879 , fixed by original designation.

Diagnosis. Body subcylindrical, posterodorsal margins of pleonites 1 and 2 smooth, urosomites 2 and 3 coalesced. Rostrum short; eyes large or medium-sized, clearly separat- ed; antennal sinus shallow. Antennae slender, male antennae usually with calceoli; antenna 1 peduncular article 3 shorter than article 1, accessory flagellum vestigial. Mandibular palp present; incisor and molar developed. Maxilla 1 with inner plate strongly setose medially; outer plate with many apical robust setae; palp 2-articulated, with apical setae. Maxilla 2 with both plates bearing apical setae, inner plate with dense medial setae. Maxillipedal palp consisting of 4 articles, exceeding outer plate. Coxae strongly overlapping; coxae 1–4 longer than broad, 5–7 short, coxae 5 and 6 bilobed; gills present on coxae 2–6 in both sexes; oostegites of female present on coxae 2–5, oostegites on coxae 2 and 3 large. Gnathopod 1 of both sexes small, subchelate; carpus with posterodistal lobe. Male gnathopod 2 stout, subchelate; carpus short, with narrow posterodistal lobe; propodus dilated, palm oblique, with several robust setae. Female gnathopod 2 small, subchelate; carpus with posterodistal lobe. Pereopods 3–6 not fossorial. Pereopods 3 and 4 similar; bases slender; dactyli curved. Pereopods 5 and 6 each with expanded basis and curved dactylus. Pereopod 7 extremely long; basis expanded; dactylus elongate, tapering distally. Pleonal epimera each with posteroventral tooth. Uropods biramous, slender; inner rami longer than outer rami. Telson entire, longer than broad.

Included species. Twelve species: P. australis (Haswell, 1880) ; P. bacescui Ortiz and Lalana, 1997 ; P. dichotomus ; P. fluviatilis (Thomson, 1879) ; P. karitane Barnard, 1972 ; P. larai Knott, 1975 ; P. lowryi Barnard and Drummond, 1992 ; P. mapela Myers, 1985 ; P. novacaledoniae Ruffo and Paiotta, 1972 ; P. novizealandiae (Dana, 1852) ; P. raymondi (Fearn- Wannan, 1968); P. vicinus Barnard and Drummond, 1992 .

Remarks. Paracalliope can be distinguished from Mucrocalliope by the absence of the dorsal teeth on the pleonites and the medially setose inner plates of the maxillae.