Pachychelium davidis Stephensen, 1925

Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, Zootaxa 3246 (1), pp. 1-69: 32

publication ID

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

persistent identifier

http://treatment.plazi.org/id/456087D3-363A-FF96-B8DF-0A1CFC0E4B74

treatment provided by

Felipe

scientific name

Pachychelium davidis Stephensen, 1925
status

 

Pachychelium davidis Stephensen, 1925  

Pachychelium davidis Stephensen, 1925: 121   , fig. 35. ― Stephensen, 1932: 357. ―J.L. Barnard, 1958: 97. ― Lowry, 1984: 104, fig. 42. ― Barnard & Karaman, 1991: 509. ― Palerud & Vader, 1991: 41.

not Pachychelium davidis   . ―K.H. Barnard, 1932: 75: fig. 32 (= P. schellenbergi   ).

Diagnostic description. Head lateral cephalic lobe large, narrowly rounded; ventral margin curved. Antenna 1 peduncular article 1 without posterodistal spine; accessory flagellum 2-articulate, article 1 long; flagellum with strong 2-field callynophore in male, [female not known]. Mandible lacinia mobilis absent; lamina dentata absent; accessory setal row absent; molar absent; palp article 2 broad, as long as article 3; article 3 tapered distally. Maxilla 1 outer plate with 4 setal-teeth in 4/0 or 3/1 arrangement, setal-teeth smooth; palp absent. Maxilliped inner plate absent; outer plate medium size; palp 3-articulate (article 4 absent), article 3 length about 2.2 × breadth. Gnathopod 1 subchelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 1.8 × breadth, posterior margin absent, palm without produced posterodistal corner, without robust seta. Gnathopod 2 palm minute, obtuse. Pereonite 4 without dorsal spines. Pereonite 5 without dorsal spines. Pereopod 5 merus without posteroproximal shoulder. Pereopod 6 basis with posteroventral lobe weakly produced; merus longer than broad, without posteroproximal shoulder. Pereopod 7 basis subovate with posterior margin smooth; merus, length of anterior margin 2.3 × proximal breadth. Epimeron 3 posterior margin without projections, posteroventral corner broadly rounded. Uropod 3 biramous, inner ramus just reaching base of article 2 of outer ramus. Telson   shorter than broad, entire.

Distribution. Davis Strait, North Atlantic Ocean; 740 m depth.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Pakynidae

Genus

Pachychelium

Loc

Pachychelium davidis Stephensen, 1925

Lowry, J. K. & Stoddart, H. E. 2012
2012
Loc

Pachychelium davidis

Barnard, K. H. 1932: 75
1932
Loc

Pachychelium davidis

Barnard, J. L. & Karaman, G. S. 1991: 509
Palerud, R. & Vader, W. 1991: 41
Lowry, J. K. 1984: 104
Barnard, J. L. 1958: 97
Stephensen, K. 1932: 357
Stephensen, K. 1925: 121
1925