Andaniexis andaniexis, andaniexis, 2003

Jørgen Berge, 2003, Stegocephalidae (Crustacea: Amphipoda) from Australia and New Zealand, With Descriptions of Eight New Species, Records of the Australian Museum 55, pp. 85-112 : 88-90

Andaniexis andaniexis n.sp.

Figs. 1–3

Type material. HOLOTYPE: AM P52714, ♀ 4 mm, 16°37.81'S 146°23.08'E, 1000 m (QLD-932), east of Flynn Reef , Queensland, Australia, 06 Jun. 1993. Collector: J.K. Lowry & party on RV “Sunbird” ( SEAS project trap 3, transect 1) . PARATYPE: AM P52716, ♀ 5 mm, 16°37.81'S 146°23.08'E, 1000 m (QLD-949), east of Flynn Reef , Queensland, Australia, 07 Jun. 1993. Collector: J.K. Lowry & party on RV “Sunbird” ( SEAS project trap 2, transect 2).

Distribution. Known only from the type locality.

Diagnosis (see also Table 1): Pleonites dorsally smooth. Antenna 1 flagellum with 5 articles, accessory flagellum longer than flagellum article 1. Antenna 2 peduncle article 4 shorter than article 5. Epistome produced laterally, epistomal plate present. Labrum shorter than broad, both lobes reduced. Mandibular incisor smooth, transverse. Lacinia mobilis reduced, not expanded laterally. Maxilla 1 outer plate with ST in two parallel rows, palp 2-articulate. Maxilla 2 outer plate not gaping and geniculate. Maxilliped inner plate with one nodular seta. Coxa 4 distally broad. Pereopod 6 basis expanded. Articulation present between urosomites 2 and 3. Uropod 3 outer ramus 2-articulate. Telson about as long as broad, apically rounded, entire.

Description. Rostrum reduced, inconspicuous. Antenna 1 weakly longer than antenna 2; accessory flagellum article

2 present. Antenna 2 peduncle articles 3–5 shorter than flagellum; article 3 short, about as long as broad. Epistome rectangular, with a long ridge on each side; epistomal plate produced into a small elongate medial ridge covering the entire epistome. Maxilla 1 palp reaching above the apex of outer plate; outer plate distally rounded; ST first row with 6 setae (ST1–5, ST7); ST 6 absent; gap between ST 5 and ST 7 present; ST A–C present, part of second row; inner plate with pappose setae. Maxilla 2 ordinary; outer plate setae distally simple; inner plate setae row A covering the entire margin, clearly separated from row B; row A setae pappose; row B setae proximally pappose, distally without cusps; row C present; row D present, reduced, 1–3 long slender setae distally. Maxilliped palp 4-articulate; article 2 distally unproduced; dactylus distally simple, pointed; inner plate not exceeding base of palp article 2; medial setae-row transverse with setae simple; distal setae-row present; inner setae-row reduced to one or two setae; outer plate with outer setae-row submarginal, with long robust setae; inner setae-row well developed with long robust setae, appressed to outer setae-row; distal setae-group absent. Labium distally broad, oval. Coxae and bases on the pereopods smooth. Coxae 1–3 contiguous. Pereopod 1 coxa not as deep as basis; propodus subrectangular. Pereopod 2 longer and thinner than pereopod 1; ischium elongate, ratio length to breadth exceeding 1.5, distal posterior margin with plumose setae; propodus subrectangular, palm absent. Pereopod 4 basis anterior margin with long setae, posterior margin without long setae; plumose setae on anterior distal margin; ischium with plumose setae on posterior distal margin. Pereopod 6 basis about twice as broad as basis on pereopod 5. Pereopod 7 basis anterior margin straight; distally rounded; medial row of setae present; setae short and robust. Oostegites on pereopods 2–5, gills on pereopods 2–7. Uropods: Uropod 1 peduncle longer than rami; outer ramus longer than inner. Uropod 2 peduncle longer than rami; outer ramus as long as inner. Uropod 3

Male. Unknown.

Etymology. Based upon the general morphology of the present species, it is a typical member of the genus, hence the name.

Remarks. For differences among the world’s species of Andaniexis , see Table 1.