Lestrigonidae Zeidler 2004
Creators: name: Zeidler, Wolfgang
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Lestrigonidae

description: Key to the genera of the family LESTRIGONIDAE   1. Gnathopod 2 chelate, dactylus closing against robust propodus. Pereopods 3–7 prehensile......................................................................................... Phronimopsis Claus, 1879   
­ Gnathopod 2 chelate, propodus closing against spoon­shaped carpus. Pereopods 3–7 not prehensile 2  
 2. Pereopod 5 longer than P6 (1.1–1.2x). Pereopods 6 & 7; dactylus with distinct upward bend midway. Pereonites 1–5 fused in both sexes............. Themistella Bovallius, 1887   
­ Pereopod 5 not longer than P6. Pereopods 6 & 7 with normal dactylus. Pereonites 1–5 rarely fused.................................................................................................................. 3  
 3. Pereopod 5 about 0.8x length of P6.................................. Hyperionyx Bowman, 1973   
­ Pereopod 5 subequal in length to P6........................................................................... 4  
 4. Pereopod 7 clearly shorter than P5 or P6; about 0.7x length of P6........................................................................................................................... Hyperioides Chevreux, 1900   
­ Pereopod 7 slightly shorter than P6 but similar in length to P5.................................. 5  
 5. First two pereonites fused in adult male & female. Maxilliped; outer lobes fused medially; inner lobe rudimentary .................................................. Hyperietta Bowman, 1973   
 ­ First three, four or five pereonites fused in adult female; first two or four pereonites fused in adult male. Maxilliped; outer lobes separate; inner lobe usually well­developed................................................................................. Lestrigonus Milne­Edwards, 1830    Key to male species of LESTRIGONIDAE with pereonites 1–2 fused (except Phronimopsis)   
 1. Eyes limited to dorsal surface of head............. Hyperioides longipes Chevreux, 1900   
­ Eyes occupying most of head surface......................................................................... 2  
2. Pereopods 5–7; carpus with at least one robust seta on anterior margin....................... 3  
­ Pereopods 5–7; carpus without robust seta................................................................... 4  
 3. Hyperietta parviceps, H. stephenseni and H. stebbingi..................................................................................................— consult Bowman (1973) to distinguish these species   
4. Pereopods 3 and 4; carpus with at least two conspicuous robust setae on posterior margin 5.................................................................................................................................... 5  
­ Pereopods 3 and 4; carpus with only one conspicuous robust seta on posterior margin..................................................................................................................................... 10  
 5. Pereopods 5–7; propodus with recurved dentate hook overlapping dactylus........................................................................................... Lestrigonus crucipes (Bovallius, 1889)   
­ Pereopods 5–7; propodus with smooth spine overlapping dactylus............................. 6  
 6. Gland cone pointed ventrally .................... Lestrigonus schizogeneios (Stebbing, 1888)   
­ Gland cone rounded ventrally....................................................................................... 7  
 7. Gnathopod 1; basis deeply concave distally on anterior margin.................................... ................................................................................. Hyperietta luzoni (Stebbing, 1888)   
­ Gnathopod 1; basis with at most, an even bulge on anterior margin............................ 8  
 8. Pereopod 5; basis relatively broad, width about 0.8x length, overlapping anterior margin of ischium ...................................................... Hyperietta vosseleri (Stebbing, 1904)   
­ Pereopod 5; basis narrow, width about 0.5x length, not overlapping ischium.............. 9  
 9. Gnathopod 1; propodus with one robust seta on anterior margin................................... ......................................................................... Lestrigonus shoemakeri Bowman, 1973   
 ­ Gnathopod 1; propodus with two robust setae on anterior margin................................. ........................................................................ Lestrigonus latissimus (Bovallius, 1889)   
 10. Head with additional eye facets dorsally; forming small lobe over A1. Pereopod 7 much shorter than P6; dactylus long, almost half­length propodus................................ .......................................................................... Hyperioides sibaginis (Stebbing, 1888)   
 ­ Head with evenly spread eye facets; evenly rounded anteriorly. Pereopod 7 subequal in length to P6; dactylus short, about 0.3x length of propodus.............................................................. Lestrigonus macrophthalmus (Vosseler, 1901)
description: Published as part of Zeidler, Wolfgang, 2004, A review of the families and genera of the hyperiidean amphipod superfamily Phronimoidea Bowman & Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea), pp. 1-66 in Zootaxa 567 on pages 31-32, DOI: 10.11646/zootaxa.567.1.1, http://zenodo.org/record/5259734