Drummondia tridentata, Lowry & Stoddart, 2012

Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, Zootaxa 3246 (1), pp. 1-69 : 16

publication ID

https://doi.org/ 10.11646/zootaxa.3246.1.1



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scientific name

Drummondia tridentata

sp. nov.

Drummondia tridentata sp. nov.

( Figs 9 View FIGURE 9 , 10 View FIGURE 10 )

Type material. HOLOTYPE, male, 3.8 mm, MV J14616 View Materials , south of Point Hicks , Victoria, Australia, 38°17.70'S 149°11.30'E, 400 m, coarse sand, gravel and mud, epibenthic sled, 24 July 1986, M.F. Gomon et al., RV Franklin, stn SLOPE 40 GoogleMaps . PARATYPE, male, 3.4 mm, MV J14769 View Materials , east of Eden , New South Wales, Australia, 37°7.30'S 150°20.20'E to 37°5.30'S 150°21.80'E, 520 m, grey coarse shell, epibenthic sled, 20 July 1986, G.C.B. Poore et al., RV GoogleMaps Franklin, stn SLOPE 19 .

Etymology. The specific name refers to the three dorsal spines on pereonite 5.

Diagnostic description. Head lateral cephalic lobe large, broadly rounded; ventral margin subsigmoidal. Antenna 1 peduncular article 1 with posterodistal spine; accessory flagellum 2-articulate, article 1 short; flagellum with strong 1-field callynophore in male, [female not known]. Mandible lacinia mobilis a simple robust seta; left accessory setal row modified into lamina dentata, right accessory setal row present, not on raised setose ridge; molar absent; palp attached midway; palp article 2 broad, longer than article 3; article 3 with subparallel margins. Maxilla 1 outer plate with 10 setal-teeth in 7/3 arrangement, outer row setal-teeth with lateral and medial cusps; palp absent. Maxilliped inner plate small; outer plate large; palp 4-articulate, article 4 large. Gnathopod 1 chelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 2 × breadth, posterior margin well developed, palm with produced corner, corner of palm with complex robust seta; dactylus reaching to corner of palm. Gnathopod 2 palm minute, obtuse. Pereonite 4 without dorsal spines. Pereonite 5 with 3 acute dorsal spines. Pereopod 5 merus with weak posteroproximal shoulder. Pereopod 6 basis with posteroventral lobe weakly produced; merus as broad as long, with posteroproximal shoulder. Pereopod 7 basis subovate with posterior margin weakly dentate. Epimeron 3 posterior margin without projections, posteroventral corner broadly rounded. Uropod 3 biramous, inner ramus extending less than halfway along outer ramus. Telson shorter than broad, entire.

Remarks. Drummondia tridentata is the only species in the genus with a reduced number of setal-teeth on the outer plate of maxilla 1.

Distribution. Bass Strait, Australia; 400–520 m depth.


University of Montana Museum


Collection of Leptospira Strains

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