Paratanais species
publication ID |
https://doi.org/ 10.11646/zootaxa.3676.1.1 |
publication LSID |
lsid:zoobank.org:pub:7AB2D8F5-62F2-46D1-BDE4-BF91D6513797 |
persistent identifier |
https://treatment.plazi.org/id/03E787D0-FFBA-FFD0-7B8B-D7FAB2E77337 |
treatment provided by |
Felipe |
scientific name |
Paratanais species |
status |
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Key to NZ Paratanais species
(with Atemtanais male)
1. Body slender [6.0–8.8 times ltb]; antennule four or five-articled, [excluding any cap-like segment], with only one terminal aesthetasc; eyes small..............................................................................females, 2
- Body stout [4.2–5.5 times ltb]; antennule with multi-segmented flagellum [four or five segments] bearing numerous aesthetascs; eyes large............................................................................. ..males, 7
2. Pereopods 2–6 carpus spines heavily serrate ( Fig. 36Q View FIGURE 36 ); maxilliped palp article-2 medial seta with sparse but elongate oral pectination ( Fig.36R View FIGURE 36 ); uropod endopod only as long as peduncle.................................... Paratanais caterae View in CoL
- Pereopods 2–6 carpus spines weakly or moderately serrate ( Fig. 36S View FIGURE 36 ); maxilliped palp article-2 medial seta with short dense oral or aboral serration ( Fig. 36T View FIGURE 36 ); uropod endopod longer than peduncle......................................... 3
3. Antenna article-2 with thorn-like inferior spine or apophysis with terminal seta ( Fig. 36U View FIGURE 36 )............................4
- Antenna article-2 with mid-inferior or inferodistal seta (usually on small apophysis or pedestal [if present]) ( Fig. 36V View FIGURE 36 )...... 5
4. Antennal article-2 inflated, with inferodistal spine; article-3 superior spine relatively short and broad; pereopods 2–3 basis with superior seta (c.f. Fig. 36W View FIGURE 36 ); pereopods 4–6 merus without seta (c.f. Fig. 36X View FIGURE 36 )................................ P. tara View in CoL
- Antenna article-2 not inflated but with large subdistal apophysis; article-3 spine long and acute; pereopods 2–3 basis with inferior seta ( Fig. 36Y View FIGURE 36 ); pereopods 4–6 merus with seta ( Fig. 36Z View FIGURE 36 ).......................................... P. hamulus View in CoL (N.B. Penteparatanais View in CoL may key out here if only with four-articled antennule; see remarks for this species).
5. Antenna article-2 inflated; article-3 superior margin convex; carpus spines of pereopods 4–6 relatively short and stout; uropod exopod one or two-segmented.................................................................... .. P. paraoa View in CoL
- Antenna article-2 not inflated (subrectangular); article-3 superior margin not strongly convex; uropod exopod one-segmented.....................................................................................................6
6. Cephalothorax only as long as pereonites 1–2 combined; pereopod-1 merus long (three times ltb); uropod exopod longer than peduncle; pereopods 2–3 hardly smaller than pereopod-1; antenna article-2 inferior seta at mid-length ( Fig. 36V View FIGURE 36 ).................................................................................................... P. incomptus View in CoL
7. Antennule flagellum four-segmented....................................................................... 8
- Antennule flagellum five-segmented (segment-5 small, caplike)................................................. 9
8. Antenna flagellum segment-1 with many aesthetascs, segment-2 longer than succeeding segments; chela strongly curved ( Fig. 31A View FIGURE 31 ), dactylus with one long spine on incisive margin.................................................. .. P.puia View in CoL
- Antenna flagellum segment-1 with relatively few aesthetascs, segment-2 short; chela not curved, dactylus with one or two peg- like spines on incisive margin............................................................. Atemtanais taikaha View in CoL
9. Antenna article-2 with inferior apophysis and seta........................................................ P. tara View in CoL
- Antenna article-2 with sub-distal or inferodistal seta (with or without small apophysis).............................. 10
10. Uropod endopod longer than peduncle; cheliped dactylus with one peg-like spine on incisive margin............ P. paraoa View in CoL
- Uropod endopod about as long as peduncle; cheliped dactylus with two peg-like spines on incisive margin........ P. caterae View in CoL
The southeast Australian species Paratanais tanyherpes would key out at couplet 4 with P. tara , but is more elongate (pereonites 4 and 5 longer than broad, both shorter than broad in P. tara ) and has a one-segmented uropod endopod, inter alia. The other three Paratanais species described from the eastern seaboard of Australia, P. maleficus , P. perturbatius , and P. wanga would appear at couplets 6, 6, and 5 respectively but the first (actually a chimaera with P. malignus in Larsen 2001) lacks a sinuate cheliped propodal spine, has a very short antennal article-3 spine, and the antennal article-2 has mid-inferior seta (not shown in Larsen 2001); P. perturbatius (also chimaeric with malignus ) has an inferodistal seta on antennal article-2 as in P. puia but has a shorter cheliped fixed finger and dactylus, and less size-differentiation in pereopods 1–3; P. wanga has a large antenna article-2 seemingly without an inferior seta, and one-segmented uropod endopod inter alia [all observations apart from those on P. wanga are based on examination of type and cited material from the Australian Museum, see below].
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