J. BERGE, W. VADER AND A. GALAN 

Fig.4 Andaniexis americana sp.novy., from: Barnard 1964:14, fig.9 “Andaniexis australis’ . 
(articles 3—5) longer than flagellum; article 3 short, about as long as 
broad; article 4 longer than article 5. 
Epistome produced laterally, rectangular with a long ridge on 
each side; epistomal plate (medial keel) produced into a small 
elongate medial ridge exceeding along the entire epistome. 
Mouthparts not elongate or pointed. 
Mandible incisor transverse; smooth; left lacinia mobilis present, 
reduced, laterally straight, not conical. 
Maxilla | palp 2-articulate, oval, apex reaching beyond outer 
plate; outer plate distally rounded; ST in two parallel rows, first 
marginal and second submarginal, ST first row with 6 setae (ST1-—5, 
ST7), ST 1 ordinary (similar to ST 2-4), gap between ST 5 and ST 
7 present, ST A—C present and part of second row; inner plate with 
a weakly developed shoulder, setae pappose. 
Maxilla 2 ordinary; outer plate setae without distal hooks or cleft; 
inner plate setae row A covering the entire margin, clearly separated 
from row B, row A setae pappose, 3—4 first setae pectinate distally; 
row B setae proximally pappose, distally with cusps absent; row C 
present; row D present, 1—3 long setae distally, slender. 
Maxilliped palp 4-articulate, article 2 distally unproduced, dacty- 
lus distally simple (pointed); inner plate with | nodular setae; medial 
setae-row present, not reduced, transverse, setae pectinate; distal 
setae-row present, setae simple; inner setae-row absent; outer plate 
outer setae-row present, submarginal, setae attached normally, setae 
long robust; inner setae-row present, well developed, setae long 
robust, slender, appressed to outer setae-row; distal setae-group 
absent. 
Labrum very short; lobes symmetrical and reduced. 
Labium unknown. 
Coxal plates and basis of pereopods smooth; coxae 1—3 contiguous. 
Pereopod | coxa not as deep as basis; propodus suboyate. 
Pereopod 2 longer and thinner than pereopod 1; ischium elongate, 
ratio length:breadth 
exceeding 1.5; ischium distal posterior margin with plumose 
setae; propodus subrectangular, palm absent. 
Pereopod 4 coxa posteroventral lobe small, reaching about the 
base of the 6th pereon segment; basis anterior and posterior margins 
without long setae, with plumose setae on distal anterior margin, no 
plumose setae on distal posterior margin; ischium with plumose 
setae on posterior distal margin. 
Pereopod 6 basis posteriorly expanded, expansion conspicuous, 
rounded posteriorly, without a row of long plumose setae. 
Pereopod 7 basis anterior margin concave; distally rounded; no 
medial row of setae. 
Oostegites on pereopods 2-5. 
Pleonites 1—3 dorsally smooth. 
Urosome: articulation between urosome segments 2 and 3 present. 
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 peduncle longer than rami, outer ramus 2-articulate. 
Telson as long as broad, shorter than peduncle uropod 3, entire; 
apically rounded, submarginal setae apically. 
MALE. Unknown. 
REMARKS. This is the only recorded species of Andaniexis from 
the west coast of the American continent. The present species is a 
typical member of this genus, but is separated from all other known 
species of this genus by its very broad and powerful lacinia mobilis 
(left mandible only). As in A. australis, A. gracilis Berge & Vader, 
1997a, A. oculatus Birstein & Vinogradov, 1970 and A. stylifer 
