Exampithoe burrowwo
- Dataset
- Three new species of Exampithoe from Australia and New Zealand (Ampithoidae: Amphipoda: Crustacea)
- Rank
- SPECIES
- Published in
- Hughes, Lauren E., Peart, Rachael A. (2015): Three new species of Exampithoe from Australia and New Zealand (Ampithoidae: Amphipoda: Crustacea). Zootaxa 3918 (4): 559-570, DOI: 10.11646/zootaxa.3918.4.5
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Amphipoda
- family
- Ampithoidae
- genus
- Exampithoe
- species
- Exampithoe burrowwo
description
Description of holotype. Head as long as deep. Antenna 1 unknown. Antenna 2 robust, stout; peduncle article 4 subequal in length to article 5; flagellum longer than peduncular article 5, with 21 articles. Labrum directed nearly straight down, lateral margins without midlateral notches. Mandible molar well developed, triturating, accessory setal row with 4 robust setae; palp 2 - articulate; article 1 subequal in length to article 2, length 4 times width; article 2 with 2 apical setae. Labium outer plates weakly excavate to entire, without an apical duct; mandibular lobes with curved margins, rounded apically. Maxilla 1 inner plate, unknown; palp article 2, with apical slender setae, without apical robust setae. Maxilla 2 inner and outer plates subequal in width; inner plate without oblique setal row. Maxilliped outer plate with developed row of large robust setae along medial margin. Pereon. Coxae 1 – 4 as long as broad. Gnathopod 1 subequal in size to gnathopod 2; coxa distinctly larger than coxa 2, as broad as deep, anteroventral corner produced, anterior margin straight, anteroventral corner acute; basis longer than coxa, length 3.8 times width, anterodistal lobe large and rounded, with 6 slender setae; ischium anterior margin without lobe; merus anterodistal lobe subacute, posterodistal corner rounded; carpus elongate, rectilinear, twice as long as broad, longer than merus, longer than propodus, length 1.2 times propodus, carpus lobe absent, anterior margin with slender setae; propodus narrow, subrectangular, length twice width, palm extremely acute, convex, without posterodistal shelf, posterodistal corner rounded, with 1 robust seta defining palm; dactylus subequal in length to palm, inner margin serrate. Gnathopod 2 basis longer than coxa, length 3.6 times width, anterodistal lobe large and rounded, not reaching beyond ischium, anterodistal corner with 3 slender setae; ischium anterior margin without lobe; merus posterior margin without lobe; carpus subrectangular, length 1.3 times width, longer than propodus, anterior margin with slender setae; propodus subrectangular, narrow, length 3 times width, palm acute, convex, posterodistal corner rounded, with 1 robust seta defining palm; dactylus subequal in length to palm, tapering evenly, apically acute, inner margin serrate. Pleon. Epimera 1 – 3 posteroventral corner broadly rounded. Uropod 1 unknown. Uropod 2 peduncle without distolateral projection, margins with 6 robust setae, slender setae fringe absent; inner ramus longer than outer ramus, with 4 lateral and 2 apical robust setae, slender setae absent; outer ramus with 2 lateral and 2 apical robust setae, slender setae absent. Uropod 3 peduncle much longer than broad, length twice breadth, 4 times rami length, without marginal or apical robust setae, with marginal and distal slender setae; rami short, as long as broad; outer ramus subequal in length to inner ramus, with 2 large recurved distal robust setae, without patch of small lateral denticles or lateral setal fringe; outer ramus with 1 apical robust setae and distal slender setae. Telson subtrapezoidal, apically rounded, with small apical cusps, with 3 pair of lateral setae and 2 pair of lateral plumose setae.
diagnosis
Diagnosis. Mandible accessory setal row with 4 robust setae; palp 2 - articulate; article 1 subequal in length to article 2; article 2 apically setose. Labium outer plates weakly excavate to entire, without an apical duct; mandibular lobes with curved margins, rounded apically. Maxilla 1 palp article 2, with apical slender setae, without apical robust setae. Maxilliped outer plate with developed row of large robust setae along medial margin. Coxae 1 – 4 as long as broad. Gnathopod 1 subequal in size to gnathopod 2; coxa distinctly larger than coxa 2, as broad as deep, anteroventral corner produced, anterior margin straight, anteroventral corner acute; basis longer than coxa, anterodistal lobe large and rounded, with 6 slender setae; ischium anterior margin without lobe; merus anterodistal lobe subacute, posterodistal corner rounded; carpus elongate, rectilinear, twice as long as broad, longer than merus, longer than propodus, anterior margin with slender setae; propodus narrow, subrectangular, length twice width, palm extremely acute, convex, without posterodistal shelf, posterodistal corner rounded, with 1 robust seta defining palm. Gnathopod 2 basis longer than coxa, anterodistal lobe large and rounded, anterodistal corner with 3 slender setae; ischium anterior margin without lobe; carpus subrectangular, longer than propodus, anterior margin with slender setae; propodus subrectangular, narrow, palm acute, convex, posterodistal corner rounded, with 1 robust seta defining palm. Epimera 1 – 3 posteroventral corner broadly rounded. Uropod 2 inner ramus with 4 lateral robust setae; outer ramus with 2 lateral robust setae.
discussion
Remarks. Exampithoe burrowwo sp. nov. is similar to E. gracilipes in that the mandibular palp is reduced with only 2 articles. Exampithoe burrowwo sp. nov. can be distinguished from E. gracilipes by the gnathopod 1 coxa where the anterodistal corner is subacute, and the basis anterodistal corner has a large rounded lobe, while in E. gracilipes, the coxa is rounded and the basis lobe is weakly developed and subquadrate.
distribution
Distribution. Australia: Port Jackson (current study).
etymology
Etymology. From the Australian indigenous word, burrowwo, meaning shark, applied as a noun in apposition.
materials_examined
Type material. Holotype: male, 10.5 mm, dissected, 4 slides, AM P. 92555, Shark Bay, Port Jackson, New South Wales, Australia (33 ° 51 ' 12 " S 151 ° 15 ' 54 " E), subtidal, macroalgae, coll. A. G. B. Poore, 2012. Paratypes: 7 males, 2 females, AM P. 88413, same location as holotype. Type locality. Shark Bay, Port Jackson, New South Wales, Australia.
Name
- Homonyms
- Exampithoe burrowwo