Paragrubia edgari Peart, 2009

Hughes, L. E. & Lowry, J. K., 2009, Ampithoidae *, Zootaxa 2260 (1), pp. 153-219 : 207-208

Paragrubia edgari Peart sp. nov.

( Figs 33 , 34 )

Type material. Holotype, female, ovigerous, 10.0 mm, AM P51258, Cape Cleveland , Queensland, Australia (19°11’S 147°01’E), on Sargassum sp. , 1 m, G. Edgar, 24 August 1996 ( CA 12 ) . Paratypes: male, 11.0 mm, AM P51259 ( CA 12 ) ; juvenile, 4 mm, AM P51260 ( CA 12 ) .

Additional material examined. 1 dissected male, 4 slides, AM P76984 ( JDT /LIZ 15h); 8 unsexed, AM P76985 ( SEL /LZI-4-2).

Type locality. Cape Cleveland , Queensland, Australia (19°11’S 147°01’E), on Sargassum sp. , 1 m.

Etymology. This species is named for the collector, Graham Edgar.

Description. Based on holotype, female, 10.0 mm, AM P51258.

Head. Head longer than deep. Antenna 1 longer than antenna 2; peduncular article 1 longer than article 2; flagellum 49 articles; accessory flagellum with 5 articles. Antenna 2 peduncle not densely setose on ventral margin; article 4 longer than article 5; flagellum 24 articles. Upper lip lateral margins each with midlateral notch. Mandible molar well developed, triturating, accessory setal row with 5 serrate setae; palp 3–articulate, apically setose; article 1 shorter than article 2; article 2 subequal in length to article 3. Lower lip outer plates entire, lateral lobe distinctly longer than medial lobe; mandibular lobe with curved margins, apically subacute. Maxilla 1 inner plate with 1 seta; palp article 2 slender. Maxilla 2 inner plate narrower than outer plate. Maxilliped outer plate with row of small robust setae along medial margin.

Pereon. Coxae 1–4 deeper than broad. Gnathopod 1 subequal in size to gnathopod 2; coxa subequal to coxa 2, anteroventrally produced, anterior margin slightly concave, anteroventral corner subacute, with a tuft of slender setae in the posteroventral corner; basis subequal in length to coxa, anterodistal lobe large, rounded, anterodistal corner without setae; merus posterodistal lobe subacute; posterior margin convex; carpus subequal in length to propodus, anterior margin without setae; propodus narrow, subovoid; palm acute, slightly convex, posterodistal corner rounded, with 1 robust seta defining palm; dactylus subequal in length to palm, tapering evenly, inner margin crenate. Gnathopod 2 with long, simple setae on margins; coxa with a tuft of slender setae in the posteroventral corner; basis with sparse slender setae, basis anterodistal lobe absent, anterodistal corner without setae; merus margin with subacute anterodistal lobe; carpus subequal to propodus, subtriangular; propodus narrow, greater than 1.5 x as long as broad, subovoid; palm acute, entire, with posterodistal corner, rounded, with 1 robust seta defining palm; dactylus subequal in length to palm, tapering evenly, apically acute, inner margin crenate. Pereopods 3–4 basis narrow; merus subequal in length to carpus. Pereopods 5–7 simple. Pereopod 5 basis with medial slender setae; propodus not expanded distally, with 3 anterodistal striated robust seta; dactylus slightly curved. Pereopod 6 basis posterior margin straight, with several marginal slender setae; propodus not expanded distally, with 3 anterodistal striated robust setae; dactylus slightly curved. Pereopod 7 similar to pereopod 6.

Pleon. Epimera 2–3 posteroventral corner broadly rounded, or narrowly rounded. Uropod 1 peduncle with 5 robust setae, without slender setal fringe, with large, acute distoventral spine; outer ramus with 6 lateral robust setae; inner ramus with 6 lateral robust setae. Uropod 2 peduncle with 3 robust setae; outer ramus with 5 lateral robust setae; inner ramus with 6 lateral robust setae. Uropod 3 peduncle longer than broad, less than 2 x length of rami, without marginal slender setae, with 4 distal peduncular robust setae, without distal slender setae; outer ramus with 1 weakly curved distal robust setae, with 2 lateral robust setae and 8 lateral slender setae; inner ramus with 3 distal slender setae, with 1 lateral robust seta. Telson subtrapezoidal, apically rounded, with small apical cusp on each distolateral corner, with 5 pair of oblique medial slender setae and 2 pair of lateral slender setae.

Male (sexually dimorphic characters). Based on paratype, male, 11.0 mm, AM P51259. Antenna 1 primary flagellum 64 articles. Antenna 2 flagellum 30 articles. Gnathopod 1 larger and stouter than gnathopod 2; basis longer than coxa, anterodistal corner with 1 slender seta; carpus shorter than propodus, anterior margin with slender setae; propodus broad, subrectangular; palm excavate, posterodistal corner subquadrate. Gnathopod 2; anterodistal lobe large, rounded, reaching beyond ischium, anterodistal corner with 2 slender setae.

Habitat. Brown alga, Sargassum sp.

Remarks. Paragrubia edgari sp. nov. is most similar to P. latipoda Ren, 2001 and P. vorax Chevreux, 1901 . In P. edgari the male gnathopod 1 propodus is subrectangular with a medially excavate palm, while in P. latipoda and P. vorax the propodus is subovoid with a convex palm.

Distribution. Australia. Queensland: Lizard Island (current study); Cape Cleveland (current study).

Figures

FIGURE 33. Paragrubia edgari Peart sp. nov., holotype, female, 10 mm, AM P51258, paratype, male, 11 mm, AM P51259, Cape Cleveland, Queensland.

FIGURE 34. Paragrubia edgari Peart sp. nov., holotype, female, 10 mm, AM P51258, paratype, male, 11 mm, AM P51259, Cape Cleveland, Queensland.