On the Family Nannastacidae (Crustacea, Cumacea) from the Australian Museum Collection
Petrescu, Iorgu
Records of the Australian Museum
2018
2018-03-28
70
1
1
111
QGMM
Petrescu, 2018
Petrescu
2018
[975,1227,1248,1275]
Malacostraca
Nannastacidae
Campylaspis
Animalia
Cumacea
30
31
Arthropoda
species
wilsoni
sp. nov.
Fig. 39
Holotypesubadult ♀, 2.75 mm, P.64693, Australia, NSW, Jervis Bay, Moona Moona Creek, -35.05° 150.69°, 28 Jan 1983, in AM. Paratypes: 1♀P.88274; 1♀(dissected) [same data as P.88274] MGAB CUM 1648; 1♀, P.64573; 1♀, P.88617; 1♀, P.88273; 2♀♀, P.88275.
Etymology. The species is named in honour of Dr Buz Wilson, retired Principal Research Scientist at the Australian Museum, as a sign of gratitude for the help and advice that I received from him during my work at the museum.
Diagnosis. Carapace 0.45 body length, ocular lobe with 3 large lenses; maxilliped 2 dactylus with terminal teeth shorter than propodal seta; maxilliped 3 carpus longer than merus; pereopods with large articles; pereopod 2 dactylus with terminal seta; uropodal peduncle 1.48 6 pleonite length, 2.3 endopod length, endopod 1.1 exopod length, endopod with 3 short medial stout setae.
Description. Carapace0.45 entire body length, with 2 lateral ridges delimiting 2 sulci, 1 transverse ridge on upper sulcus, on anterior 1/3 of carapace; small antennal notch; ocular lobe with 3 large lenses ( Fig. 39 A, B). — Antenna 1peduncle with short, robust articles, article 1 0.7 rest of article’s length, with 2 simple setae; article 2 1.25 article 3 length; main flagellum 3-articulate, aesthetascs 2.7 main flagellum length, accessory flagellum minute, uniarticulate ( Fig. 39 C). — Maxilliped 2basis 0.6 entire maxilliped length, fused with ischium, with short plumose seta on distal medial corner; carpus 1.6 merus length, with 2 simple setae; propodus 2.9 carpus length, longer than distal lateral strong seta; dactylus with 3 teeth shorter than propodal seta ( Fig. 39 D). — Maxilliped 3basis 0.5 rest of article’s length, with 3 plumose setae on medial distal corner, 2 much longer on lateral distal corner; large merus, with serrate margins, as long as basis; carpus, little shorter than propodus; propodus with serrate margins; short dactylus, 0.4 as long as propodus, with terminal simple setae ( Fig. 39 E). — Pereopod 1basis 0.53 rest of articles combined length; large articles; basis to propodus with numerous plumose setae on both margins; merus, 2nd longest article, 1.25 carpus length; carpus as long as propodus; propodus 2 dactylus length; dactylus with terminal simple setae ( Fig. 39 F). — Pereopod 2basis 0.4 as long as entire length of pereopod, numerous plumose setae on both margins of basis to carpus; merus 7.5 ischium length; carpus 2.5 propodus length; dactylus 3 propodus length, without tapering tip, numerous short simple setae on both margins ( Fig. 39 G). — Pereopods 3–5with decreasing basis; increasing carpus in pairs 3 and 4, shorter in pair 5; dactylus with terminal long robust seta ( Fig. 39 H–J). — Uropodwith serrate margins, large peduncle, 1.48 pleonite 6 length, 2.3 endopod length, exopod/ endopod: 0.85, exopod with 1 outer subterminal seta and 1 short terminal seta, endopod with 3 short medial setae and 1 short robust terminal seta ( Fig. 39 K).
Remarks. This species is similar to C. triplicata Hale, 1945, but differs mainly by having two instead of three lateral ridges delimiting depressions.
Distribution. Coral Sea: Portlock Reef, at 20 m; Australia: NSW—Jervis Bay, and northeast of Eden, at 250–300 m; NT—New Year Island, at 20 m; and WA—North West Shelf, at 41–43 mdepth.
1983-01-28
AM
Australia
Jervis Bay
Moona Moona Creek
30
31
1
1
holotype
1983-01-28
MGAB
Australia
Jervis Bay
Moona Moona Creek
30
31
CUM 1648
1
paratype