A review of the Australian species of Ampithoe Leach, 1814 (Crustacea: Amphipoda: Ampithoidae) with descriptions of seventeen new species Author Peart, Rachael A. text Zootaxa 2007 2007-08-31 1566 1 1 95 https://biotaxa.org/Zootaxa/article/view/zootaxa.1566.1.1 journal article 10.11646/zootaxa.1566.1.1 1175­5334 5096061 08FAC923-666D-4A9C-B6DB-B5E823190187 Ampithoe katae sp. nov. ( Figs 26–29 ) Type material . Holotype : AM P61842, male, 5 mm , Mangrove Beach , Lizard Island , Great Barrier Reef , QLD, 14°40.99’S 145°27.63’E , 19 Nov 1999 , 1 m, on Turbinaria sp. , R . Peart . Paratypes : AM P61843, female, 6 mm , type locality ; AM P61844, 6 specimens , type locality ; AM P61845, 1 specimen , Coconut Beach , Lizard Island , Great Barrier Reef , 14°40.81’S 145°28.41’E , 17 Nov 1999 , 1.5 m , on seagrass , R . Peart ; AM P61846, 2 specimens , Coconut Beach , Lizard Island , Great Barrier Reef , 14°40.81’S 145°28.41’E , 17 Nov 1999 , 1.5 m , on Turbinaria sp. , M. Huggett & K. Dempsey ; AM P61847, 1 specimen , Crystal Beach , Lizard Island , Great Barrier Reef , 14°40.99’S 145°28.38’E , 18 Nov 1999 , 3.2 m , on Turbinaria sp. , M. Huggett & R . Peart ; AM P61848, 4 specimens , Mangrove Beach , Lizard Island , Great Barrier Reef , 14°40.99’S 145°27.63’E , 19 Nov 1999 , 3 m, on green algae , R . Peart ; AM P61849, 6 specimens , Mangrove Beach , Lizard Island , Great Barrier Reef , 14°40.99’S 145°27.63’E , 19 Nov 1999 , 1 m, on Turbinaria sp. , M. Huggett ; AM P61850, 2 specimens , off Casaurina Beach , Lizard Island , Great Barrier Reef , 14°40.63’S 145°26.71’E , 21 Nov 1999 , 1 m, on green algae, M. Huggett , R . Peart & K. Dempsey . Diagnosis . Antenna 2 slender, similar to antenna 1, not densely setose on ventral margin. Lower lip with lateral lobe longer than medial lobe. Maxilla 1 inner plate with three slender setae. Gnathopod 1 carpal lobe subacute; carpus shorter than propodus; palm convex, without midmedial tooth, without posterodistal tooth defining palm; dactylus subequal in length to palm. Gnathopod 2 without densely setose margins; basis posterodistal lobe large and rounded, with 1 robust seta; carpus shorter than propodus; palm acute, excavate, without a midmedial tooth, with a small subacute posterodistal tooth defining palm; with 1 defining robust seta; dactylus subequal in length to palm. Pereopod 3 basis narrow; merus narrow. Pereopods 5–7 simple. Pereopod 5 merus subrectangular. Uropod 3 peduncle with 4 distal robust setae, outer ramus subequal in length to inner ramus, without patch of small conical lateral denticles, without lateral setal fringe; inner ramus with 3 distal robust setae. Telson distally truncated, apical cusps small. Description . Based on holotype male, 5 mm , AM P61842. Head as long as deep. Antenna 1 longer than antenna 2; peduncular article 1 subequal to article 2 (0.98 x), article 2 longer than article 3 (2.56 x), article 3 shorter than article 1 (0.4 x); primary flagellum with 17–20 articles. Antenna 2 peduncular article 4 subequal to article 5; flagellum 11 articulate. Mandible molar with 4–6 robust setae in the accessory setal row; palp stout, long, setose along posterior margin, article 1 shorter than article 2 (0.33 x), article 2 longer than article 3 (1.35 x), article 3 longer than article 1 (2.22 x). Lower lip mandibular lobe with curved margins, rounded apically. Maxilla 1 palp with apical robust setae. Maxilla 2 inner plate narrow, outer plate broader. Maxilliped outer plate with developed setation (robust setae large). FIGURE 26. Ampithoe katae sp. nov. , holotype, male, AM P61842, 5 mm. Paratype, female, AM P61843, 6 mm. Lizard Island, Queensland, Australia. Pereon . Gnathopod 1 without densely setose margins; coxa larger than gnathopod 2 coxa, produced distoventrally, distoventral margin rounded, anterior margin concave, ventral margin, with a row of small setules; basis shorter than coxa, with sparse (sometimes plumose) slender setae, posterodistal lobe small and rounded, 1 slender seta; merus produced to form a small, subacute distoventral lobe, anterior margin with setae absent; carpus longer than merus, subtriangular, anterior margin with 2 robust setae and slender setae; propodus narrow (length 1.94 x width), subrectangular; palm with 1 defining robust seta; dactylus inner margin denticulate. Gnathopod 2 coxa ventral margin with a row of small setules; basis subequal to coxa, with sparse slender setae; merus produced to form a short, subacute distoventral lobe, anterior margin with setae absent; carpus longer than merus, subtriangular, anterior margin with 2 robust setae and slender setae; propodus broad (length 1.31 x width), ovoid, produced into an anterodistally setose lobe; dactylus tapering evenly, acute, inner margin denticulate. Pereopod 5 basis with marginal robust setae, without medial slender setae; distal articles slender; propodus not expanded distally, subrectangular, with 3 distal simple striated robust setae; dactylus strongly curved. Pereopod 6 basis posterior margin rounded proximally, straight distally, with marginal robust setae, without medial slender setae; merus subrectangular; propodus slightly expanded distally, with 3 distal simple striated robust setae; dactylus strongly curved. Pereopod 7 basis with marginal robust setae, without medial slender setae; propodus defined distally by 3–5 simple robust setae. FIGURE 27. Ampithoe katae sp. nov. , holotype, male, AM P61842, 5 mm. Paratype, female, AM P61843, 6 mm. Lizard Island, Queensland, Australia. Scales represent 0.5 mm for antennae 1–2 and 0.2 mm for mouthparts. Female antennae missing. FIGURE 28. Ampithoe katae sp. nov. , holotype, male, AM P61842, 5 mm. Paratype, female, AM P61843, 6 mm. Lizard Island, Queensland, Australia. Scales represent 0.2 mm for male and 0.5 mm for female. FIGURE 29. Ampithoe katae sp. nov. , holotype, male, AM P61842, 5 mm. Lizard Island, Queensland, Australia. Scales represent 0.2 mm. Pereopod 4 identical to pereopod 3. Pleon . Epimeron 3 posteroventral corner broadly rounded. Uropod 1 peduncle with 3–5 robust setae, with long setal fringe; inner ramus slightly longer than outer ramus, with 1 or 2 marginal robust setae, slender setae absent; outer ramus with more than 5 marginal robust setae, slender setae absent. Uropod 2 peduncle with 1 or 2 robust setae, setal fringe absent; inner ramus slightly longer than outer ramus, with more than 5 marginal robust setae, slender setae absent; outer ramus with more than 5 marginal robust setae, slender setae absent. Uropod 3 peduncle longer than broad (1.49 x width), short with respect to the rami length (1.92 x), with marginal robust setae absent, marginal slender setae absent, with 1 or 2distal slender setae; inner ramus with 1 or 2distal slender setae. Telson with oblique lateral and medial rows of slender setae. Female. (sexually dimorphic characters). Based on paratype , female, 6 mm , AM P61843. Gnathopod 1 subequal in size to gnathopod 2; coxa subequal in size to gnathopod 2 coxa; merus produced to form a short, rounded distoventral lobe; carpus anterior margin with 1 robust setae and slender setae. Gnathopod 2 basis shorter than coxa, posterodistal lobe small and round, with 2 or 3 slender setae; propodus not produced anterodistally; palm entire, without tooth defining palm. Etymology . This species is named for Kate Dempsey who assisted in the collection of this species and others from Lizard Island. Remarks . Ampithoe katae sp. nov. is most similar to A. cookana sp. nov. Characters distinguishing A. katae and A. cookana are outlined under the account of the latter. Habitat . Ampithoe katae was collected from Turbinaria sp. and green algae from 1–3.5 m depth. Distribution . Lizard Island, Queensland , Australia .