Austrolamprops sulcatus, Gerken, 2018

Gerken, Sarah, 2018, The Lampropidae (Crustacea: Cumacea) of the World, Zootaxa 4428 (1), pp. 1-192 : 25-28

publication ID	https://doi.org/ 10.11646/zootaxa.4428.1.1
publication LSID	lsid:zoobank.org:pub:2419A7F0-5AED-47EC-86BB-06AADB2A4BD9
DOI	https://doi.org/10.5281/zenodo.3799488
persistent identifier	https://treatment.plazi.org/id/03FD87BA-FFF4-2E30-64FF-FD9DD096CFD2
treatment provided by	Plazi
scientific name	Austrolamprops sulcatus
status	sp. nov.

Treatment

Austrolamprops sulcatus View in CoL n. sp.

( Figs 3–4 View FIGURE 3 View FIGURE 4 )

Type material. Holotype ovigerous female, NMV J62284 View Materials ; paratype subadult female, dissected, NMV J62285 View Materials ; paratype subadult male, dissected, NMV J62286 View Materials , 38 About NMV °29’20”– 38°26’49”S, 149°19’59”– 149°20’47”E, 1750–1840 m, Victoria, Australia. GoogleMaps

Other material. 12 individuals, NMV J54383 View Materials , 38°29’20”– 38°26’49”S, 149°19’59”– 149°20’47”E, 1750– 1840 m.

Description. Holotype ovigerous female, NMV J62284 View Materials , 5.9 mm.

Carapace with paired posterior dorsolateral expansion, heavy carina beginning at anterolateral corner and sweeping to mid–dorsal point carapace posterior margin, second incomplete ridge dorsal to sweeping ridge, both ridges bounding sulcus, anterolateral corner and anterior portion of sweeping ridge serrate, antennal notch present; pseudorostral lobes 0.3 carapace length, convex in dorsal view; eyelobe 0.05 carapace length; carapace 2.5 length of pereonites together ( Fig. 3A, B View FIGURE 3 ).

Paratype subadult female, NMV J62285 View Materials .

Antennule peduncle article 1 with simple seta, margin serrate; article 2 0.7 article 1 length, with 3 simple and 1 pedunculate setae; article 3 0.7 article 2 length, unarmed, margin serrate; main flagellum of 4 articles, 2.8 article 3 length, with 2 simple setae and 2 aesthetascs; accessory flagellum of 2 articles, 0.7 main flagellum article 1 length, with 4 simple setae ( Fig. 3C View FIGURE 3 ).

Antenna of 4 articles, article 1 with pappose seta, article 2 with pappose seta, article 3 unarmed, article 4 with 4 simple setae terminally ( Fig. 3D View FIGURE 3 ).

Mandible navicular, with 2 simple and 6 microserrate setae medially ( Fig. 3E View FIGURE 3 ).

Maxillule with 2 endites; outer endite with 1 pappose and 10 simple setae; inner endite with 3 simple, 1 pappose and 1 dentate setae; palp with 2 setae ( Fig. 3F View FIGURE 3 ).

Maxilla with 3 endites; broad endite distal margin with pappose and simple setae, medial row of 20 setae; medial narrow endite with 4 microserrate setae terminally; distal narrow endite with 5 microserrate setae terminally; both narrow endites extending to distal margin of broad endite ( Fig. 3G View FIGURE 3 ).

Maxilliped 1 basis produced medially as broad lobe, with 5 simple and 2 stout microserrate setae distally, 2 hook setae; ischium absent; merus with plumose seta laterally, lateral margin with tooth; carpus 2.2 merus length, with 8 simple and 5 comb setae; propodus 0.2 carpus length, with 1 simple and 3 pappose setae; dactylus 2.2 propodus length, with 3 long simple setae terminally ( Fig. 3H View FIGURE 3 ).

Maxilliped 2 basis equal to all other articles together, with 2 plumose and 1 pappose setae; ischium 0.05 basis length, with pappose seta; merus 3.3 ischium length, with pappose seta medially, pappose seta laterally; carpus 2.0 merus length, with 2 simple and 3 pappose setae medially, plumose seta laterally; propodus 0.9 carpus length, with 5 simple setae medially, 2 plumose setae laterally; dactylus 0.5 propodus length, with 4 simple setae terminally ( Fig. 3I View FIGURE 3 ).

Maxilliped 3 basis 1.3 all other articles together, with 7 pappose setae, 2 plumose setae; ischium 0.03 basis length, unarmed; merus 4.0 ischium length, with pappose seta medially, plumose seta laterally; carpus 2.5 merus length, with 9 pappose setae medially, 4 pappose setae laterally; propodus 0.6 carpus length, with 2 plumose setae medially, 3 plumose setae laterally; dactylus 0.8 propodus length, with 3 simple setae terminally; exopod 0.8 basis length, basal article unarmed, flagellum with plumo-annulate setae ( Fig. 18A View FIGURE 18 ).

Pereopod 1 basis equal to all other articles together, with 5 pappose setae, medial margin serrate; ischium 0.03 basis length, unarmed; merus 4.0 ischium length, with pappose seta medially, 2 pappose setae laterally; carpus 2.4 merus length, with 8 pappose setae; propodus 0.8 carpus length, with 6 simple setae; dactylus 0.7 propodus length, with 4 simple setae terminally; exopod 0.8 basis length, basal article with 4 pappose setae, flagellum with plumoannulate setae ( Fig. 4B View FIGURE 4 ).

Pereopod 2 basis 0.8 all other articles together, with 6 pappose setae; ischium 0.07 basis length, with pappose seta; merus 2.3 ischium length, with 1 plumose, 3 pappose and 1 microserrate setae; carpus 3.0 merus length, with 2 simple, 3 plumose and 5 microserrate setae; propodus 0.2 carpus length, with simple seta; dactylus 3.6 propodus length, with 3 setae with single subterminal setule, and 4 simple setae terminally; exopod 1.2 basis length, basal article with 4 pappose setae, flagellum with plumo-annulate setae ( Fig. 4C View FIGURE 4 ).

Pereopod 3 basis 2.0 all other articles together, with 5 pappose setae; ischium 0.06 basis length, with simple seta; merus 1.6 ischium length, with simple seta; carpus 1.3 merus length, with 2 simple and 1 annulate setae; propodus 0.8 carpus length, with annulate seta; dactylus 0.6 propodus length, with 2 simple setae terminally; exopod rudimentary, 0.2 basis length, of 2 articles with 1 pappose and 1 simple setae ( Fig. 4D View FIGURE 4 ).

Pereopod 4 basis 1.1 all other articles together, with 1 simple and 3 pappose setae; ischium 0.1 basis length, with simple seta; merus 2.0 ischium length, with 2 simple setae; carpus 1.3 merus length, with 1 simple and 1 annulate setae; propodus 0.8 carpus length, with annulate seta; dactylus 0.6 propodus length, with 2 simple setae terminally; exopod rudimentary, 0.1 basis length, of 2 articles with 1 pappose and 2 simple setae ( Fig. 4E View FIGURE 4 ).

Pereopod 5 basis 0.9 all other articles together, with pappose seta; ischium 0.2 basis length, with simple seta; merus 1.8 ischium length, with simple seta; carpus 1.1 merus length, unarmed; propodus 1.6 carpus length, with simple seta; dactylus 0.8 propodus length, with 3 simple setae terminally ( Fig. 4F View FIGURE 4 ).

Telson 2.5 length of pleonite 6, with 4 microserrate lateral setae, entire margins serrate, 3 microserrate terminal setae, 0.2 telson length ( Fig. 4G View FIGURE 4 ).

Uropod peduncles 3.0 pleonite 6 length, 0.8 telson length, with 11 microserrate setae with single subterminal setule medially. Uropod endopod of 2 articles, 0.6 peduncle length; article 1 2.3 article 2 length, with 10 microserrate setae with single subterminal setule medially; article 2 0.4 article 1 length, with 2 microserrate setae with single subterminal setule medially, 1 simple seta, simple terminal seta 1.2 article 2 length, medial margin serrate. Uropod exopod equal to length of endopod; article 1 0.6 article 2 length, unarmed; article 2 1.8 article 1 length, with 3 simple setae laterally, simple seta medially, simple terminal seta 0.5 article 2 length ( Fig. 4G View FIGURE 4 ).

Paratype subadult male, NMV J62286 View Materials .

Carapace and appendages as in female.

With 3 pairs of pleopods.

Etymology. The species is named sulcatus in reference to the sulcus on the carapace.

Depth. 1130–1850 m.

Distribution. Victoria, Australia.

Remarks. The carapace is distinctive in having paired lateral ridges; no other species with two articles in the uropod endopod has a carapace with similar ridges. Both species of Watlingia have no ridges on the carapace, and all species of Pseudodiastylis lack a maxillule palp.