Anamixis, Stebbing, 1897

White, Kristine N., 2011, A taxonomic review of the Leucothoidae (Crustacea: Amphipoda) 3078, Zootaxa 3078 (1), pp. 1-113 : 14-15

Key to species of Anamixis

1 Head anterodistal margin oblique (fig. 2a).................................................................. 2

- Head anterodistal margin rounded (fig. 2b), quadrate (fig. 2c), subquadrate (fig. 2d), or concave (fig. 2e)................ 3

2 Head without lateral ridge (fig. 2f); coxa 2 less than half width of coxae 3–4 (fig. 2g); gnathopod 1 propodus palm dentate (fig. 2i); gnathopod 2 basis with tubercles (fig. 2k), propodus mediofacial setal row above midline and reaching less than half propodus length (fig. 2m)....................................................................... A. cavatura

- Head with lateral ridge (fig. 2a); coxa 2 0.5–1 x width of coxae 3–4 (fig. 2h); gnathopod 1 propodus palm serrate (fig. 2j); gnathopod 2 basis without tubercles (fig. 2l), propodus mediofacial setal row displaced to midline and reaching greater than half propodus length (fig. 2n).......................................................................... A. vanga

3 Gnathopod 2 coxa distal margin excavate (fig.2o)............................................................ 4

- Gnathopod 2 coxa distal margin not excavate (fig. 2h)........................................................ 6

4 Eyes with 9 ocelli (fig. 2e); gnathopod 1 propodus palm serrate (fig. 2p); gnathopod 2 coxa greatly enlarged (fig. 2o), dactylus apically bifid (fig. 2s).......................................................................... A. falarikia

- Eyes with 10 or more ocelli (fig. 2c); gnathopod 1 propodus palm dentate (fig. 2q) or smooth (fig. 2r); gnathopod 2 coxa not greatly enlarged (fig. 2g), dactylus apically acute (fig. 2t)...................................................... 5

5 Antenna 1 peduncle width greater than 2 x article 2 (fig. 3a); gnathopod 1 coxa distal margin excavate (fig. 3c), palm dentate (fig. 2q); gnathopod 2 basis without tubercles (fig. 2l), propodus mediofacial setal row displaced to midline (fig. 2n)................................................................................................... A. tangaroa

- Antenna 1 peduncle width less than 2 x article 2 (fig. 3b); gnathopod 1 coxa distal margin rounded (fig. 3d), palm smooth (fig. 3e); gnathopod 2 basis with tubercles (fig. 2k), propodus mediofacial setal row above midline (fig. 2m)......... A. yarrega

6 Gnathopod 2 carpus with subdistal tooth (fig. 3f)............................................................. 7

- Gnathopod 2 carpus without subdistal tooth (fig. 3g)......................................................... 11

7 Gnathopod 1 carpus terminal ornamentation absent, propodus geniculate (fig. 3h)................................... 8

- Gnathopod 1 carpus with terminal ornamentation, propodus curved (fig. 3i)....................................... 9

8 Maxilliped inner plates fused (fig. 3k); gnathopod 1 coxa anterodistal corner subtriangular without cusp (fig. 3l); gnathopod 2 coxa distal margin convex with middistal projection, basis anterior margin setose, propodus mediofacial setal row displaced to midline, palm convex with projections, dactylus straight (fig. 3n)........................................ A. aldabra

- Maxilliped inner plates with small cleft (fig. 3j); gnathopod 1 coxa anterodistal corner subquadrate with cusp (fig. 3m); gnathopod 2 coxa distal margin rounded, basis anterior margin bare, propodus mediofacial setal row above midline, palm linear, smooth, dactylus curved (fig. 3o)............................................................ A. nedcampensis

9 Maxilliped palp article 4 apically bifid (fig. 3p); gnathopod 1 carpus with two terminal spines (fig. 3r); gnathopod 2 coxa anterodistal margin with cusp (fig. 3o), carpus with small subdistal tooth (fig. 3t); coxa 4 distal margin excavate (fig. 3w)................................................................................................... A. barnardi

- Maxilliped palp article 4 apically acute (fig. 3q); gnathopod 1 carpus with one terminal seta (fig. 3i); gnathopod 2 coxa anterodistal margin without cusp (fig. 3s), carpus with large subdistal tooth (fig. 3u); coxa 4 distal margin produced (fig. 3v).... 10

10 Gnathopod 1 coxa anterodistal margin subtriangular, facial setae absent (fig. 3c), propodus posterior margin with a single seta (fig. 4c); gnathopod 2 carpus curved, propodus mediofacial setal row above midline, palm smooth (fig. 4d)...... A. dentatus

- Gnathopod 1 coxa anterodistal margin rounded, facial setae present (fig. 4a), propodus posterior margin with two long setae (fig. 4b); gnathopod 2 carpus straight, propodus mediofacial setal row displaced to midline, palm with projections (fig. 4e)................................................................................................. A. mahe

11 Gnathopod 2 dactylus proximal margin with ornamentation (fig. 2s)............................................ 12

- Gnathopod 2 dactylus proximal margin smooth (fig. 2t)...................................................... 16

12 Eyes with seven ocelli (fig. 2b); gnathopod 1 vestigal (fig. 4g)................................................. 21

- Eyes with 10 or more ocelli (fig. 2a); gnathopod 1 well developed (fig. 4f); gnathopod 2 coxa distal margin bare, basis without serrate ridge (fig. 4i).................................................................................. 13

13 Gnathopod 1 carpus with terminal ornamentation, propodus palm smooth (fig. 4f); gnathopod 2 coxa broader than long, propodus palm linear, dactylus proximal margin bare (fig. 4i)............................................... A. hanseni

- Gnathopod 1 carpus without terminal ornamentation, propodus palm with ornamentation (fig. 4j); gnathopod 2 coxa longer than broad or equally as long as broad, propodus palm convex, dactylus proximal margin setose (fig. 4k)............... 14

14 Coxa 2 equally as long as broad, greatly enlarged (fig. 2o), anterior margin serrate, distal margin convex with mid-distal projection; gnathopod 2 basis with setose posterior margin, carpus reaching 0.4–0.6 x propodus length, dactylus straight (fig. 4k).......................................................................................... A. papuaensis

- Coxa 2 longer than broad, subequal (fig. 2g) or slightly larger than coxae 3–4 (fig. 2h), anterior margin smooth, distal margin rounded; gnathopod 2 basis with bare posterior margin, carpus reaching greater than 0.6 x propodus length, dactylus curved (fig. 4l)............................................................................................. 15

15 Head anterodistal margin quadrate with cusp (fig. 2c); antenna 1 peduncle width greater than 2 x article 2 (fig. 3a); maxilliped inner plates with small cleft (fig. 3j); gnathopod 1 basis slightly inflated, propodus with apical pore (fig. 4m); gnathopod 2 basis anterior margin with one large distal tubercle, dactylus proximal margin with two tubercles (fig. 4l)........ A. ningaloo

- Head anterodistal margin rounded without cusp (fig. 2b); antenna 1 peduncle width less than 2 x article 2 (fig. 3b); maxilliped inner plates fused (fig. 3k); gnathopod 1 basis distally expanded, propodus without apical pore (fig. 4n); gnathopod 2 basis anterior margin smooth (fig. 4o), dactylus proximal margin with one tubercle (fig. 4p)....................... A. pacifica

16 Gnathopod 1 vestigal.......................................................................... A. vestigium

- Gnathopod 1 well-developed........................................................................... 17

17 Maxilliped inner plates separate (fig. 4q); coxa 1 distal margin excavate (fig. 3c); gnathopod 2 carpus reaching 0.4–0.6 x propodus length, propodus palm sub-rectangular (fig. 4s)............................................... A. torrida

- Maxilliped inner plates fused (fig. 3k) or with small cleft (fig. 3j); coxa 1 distal margin straight or with projection (fig. 4r); gnathopod 2 carpus reaching greater than 0.6 x propodus length, propodus palm linear (fig. 4t).......................... 18

18 Antenna 1 peduncle width greater than 2 x article 2 (fig. 3a); gnathopod 1 coxa anterior margin setose, distal margin serrate (fig. 4r), propodus straight (fig. 4m); gnathopod 2 propodus posterior margin with spines/serrations (fig. 4t); coxae 3–4 anterior and distal margins setose (fig. 5a)................................................................ A. excalibur

- Antenna 1 peduncle width less than 2 x article 2 (fig. 3b); gnathopod 1 coxa anterior margin bare, distal margin smooth (fig. 3d), propodus curved (fig. 4f); gnathopod 2 propodus posterior margin without spines/serrations (fig. 4e); coxae 3–4 anterior and distal margins bare (fig. 2g)......................................................................... 19

19 Gnathopod 2 coxa less than ½ width of coxae 3–4 (fig. 5a), carpus anterior margin with indentation, propodus anterior margin with ornamentation, palm with large projections (fig. 5b); coxa 4 distal margin with cusp (fig. 5d).............. A. bazimut

- Gnathopod 2 coxa 0.5–1.0 x width of coxae 3–4 (fig. 2g), carpus anterior margin smooth, propodus anterior margin without ornamentation, palm with small projections (fig. 5c); coxa 4 distal margin without cusp (fig. 5e)...................... 20

20 Head anterodistal margin with cusp (fig. 2c); maxilliped inner plates with small cleft (fig. 3j); gnathopod 1 basis expanded, propodus palm dentate (fig. 5g); pereopods 5–7 bases posterior margins setose (fig. 5i); epimeron 3 posteroventral margin subquadrate (fig. 5k)............................................................................ A. kateluensis

- Head anterodistal margin without cusp (fig. 5f); maxilliped inner plates fused (fig. 3k); gnathopod 1 basis linear, propodus palm serrate (fig. 5h); pereopods 5–7 bases posterior margins bare (fig. 5j); epimeron 3 posteroventral margin sinuous with a simple cusp (fig. 5l)............................................................................. A. moana

21 Gnathopod 2 coxa distal margin setose, basis with serrate ridge (fig. 4h), propodus mediofacial setal row long, reaching greater than half of propodus length, dactylus with tubercles (fig. 27u)............................................. A. jebbi

- Gnathopod 2 coxa distal margin bare, basis smooth, propodus mediofacial setal row short, reaching less than half of propodus length, dactylus smooth (fig. 27v)............................................................. A. bananarama