Najnidae J.L. Barnard, 1972
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publication ID |
https://doi.org/ 10.11646/zootaxa.3610.1.1 |
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publication LSID |
lsid:zoobank.org:pub:AA71AC2D-C7BF-43AE-9E25-29A5EC843B89 |
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DOI |
https://doi.org/10.5281/zenodo.6150653 |
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persistent identifier |
https://treatment.plazi.org/id/164ACE3F-BE3A-FF8D-FF0B-F8FAFDC2B7A2 |
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treatment provided by |
Plazi |
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scientific name |
Najnidae J.L. Barnard, 1972 |
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Najnidae J.L. Barnard, 1972 View in CoL b
Type genus. Najna Derzhavin, 1937 .
Diagnostic description. Body laterally compressed. Eyes well developed, round or ovoid. Antennae 1–2 calceoli absent. Antenna 1 subequal in length to antenna 2; peduncular article 1 slightly longer than article 2; article 2 subequal to, or slightly longer than article 3; article 3 shorter than article 1; peduncular articles 1–2 not geniculate; accessory flagellum absent. Antenna 2 peduncular article 1 not enlarged. Mandible molar reduced or absent; palp absent. Maxilla 1 basal endite apically setose; palp present, symmetrical. Maxilla 2 basal endite without oblique setal row. Coxal gills on pereopods 2–6, not stalked; sternal gills absent; sternal blisters absent; oostegites fringing setae curl-tipped. Gnathopod 1 subchelate; similar in size to gnathopod 2; propodus palm without robust setae along palmar margin. Gnathopod 2 subchelate; similar in males and females (not sexually dimorphic); carpus slightly produced along posterior margin of propodus. Pereopods 3–4 not sexually dimorphic. Pereopod 4 with small posteroventral lobe. Pereopod 5 shorter than pereopod 6; coxa with posteroventral lobe. Pereopod 7 longer than pereopod 5. Pleonites 1–3 without dorsal carinae. Urosomites 1–3 free; without slender or robust dorsal setae. Urosomite 1 without large distoventral robust seta. Urosomite 2 without dorsal setae. Uropod 1 without basofacial robust setae. Uropod 3 uniramous, without plumose setae. Telson entire ; dorsal or lateral robust setae absent; apical robust setae present or absent.
Habitat. Marine, algal dwellers, epigean.
Included genera.? Insula Kunkel, 1910 ; Najna Derzhavin, 1937 .
Remarks. Serejo (2004) considered this taxon as a subfamily. We re-establish it to family-level status. Najnids separate from other talitroid taxa in not having a mandibular molar and in having non-sexually dimorphic second gnathopods.
Distribution. North Pacific.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.