Misceolamprops concavus, Gerken, 2018

Gerken, Sarah, 2018, The Lampropidae (Crustacea: Cumacea) of the World, Zootaxa 4428 (1), pp. 1-192 : 95-101

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.3799364
persistent identifier	https://treatment.plazi.org/id/03FD87BA-FFB2-2E4F-64FF-FED8D6D0CF07
treatment provided by	Plazi
scientific name	Misceolamprops concavus
status	sp. nov.

Treatment

Misceolamprops concavus View in CoL n. sp.

( Figs 33–36 View FIGURE 33 View FIGURE 34 View FIGURE 35 View FIGURE 36 )

Type material. Holotype: subadult female, NMV J62277 View Materials , 38°10’18”S, 149°57’12”E, 592 m, 14 October 1984 GoogleMaps . Paratypes: subadult female, dissected, NMV J62278 View Materials , 42°00’12”S, 148°37’42”E, 720 m, 27 July 1986 GoogleMaps ; subadult female, dissected, NMV J62279 View Materials , 38°10’18”S, 149°57’12”E, 592 m, 14 October 1984 GoogleMaps ; adult male, dissected, AM 101482 33°46’S, 151°55’E, 713 m, 8 December 1980 GoogleMaps .

Diagnosis. Carapace branchial regions not inflated. Uropod peduncles with 7 setae medially.

Description. Paratype subadult females, NMV J62278 View Materials , NMV J62279 View Materials .

Subadult female, 12.2 mm. Carapace dorsoventrally flattened, in dorsal view anterior margin concave, antennules within the concavity, marginal carina serrate; pereonites 2 and 3 with large dorsally directed process; pseudorostral lobes 0.26 carapace length; eyelobe 0.04 carapace length, no lenses; carapace 2.5 length of pereonites together ( Fig. 33A, B View FIGURE 33 ).

Antennule peduncle article 1 longest, margin serrate, with 8 simple setae; article 2 0.5 article 1 length, margins serrate, with 4 simple and 1 plumose setae; article 3 0.75 article 2 length, with 1 plumose seta; main flagellum of 4 articles, with 2 simple setae and 2 aesthetascs; accessory flagellum 0.5 length of article 1 of main flagellum, of 2 articles, with 4 simple setae ( Fig. 33C View FIGURE 33 ).

Antenna 0.8 length of antennule peduncle article 1; article 1 with serrate margin, pappose seta; article 2 margin produced as large tooth, with pappose seta; article 3 margin produced as large teeth, unarmed; article 4 with 2 simple and 1 pedunculate setae ( Fig. 33C View FIGURE 33 ).

Mandible navicular, with row of 10 microserrate setae medially, lacinia mobilis with 3 long cusps ( Fig. 33D View FIGURE 33 ).

Maxillule with 2 endites; outer endite with triple row of stout setae terminally; inner endite with 1 simple and 3 dentate setae; palp with 2 setae ( Fig. 33E View FIGURE 33 ).

Maxilla with 3 endites; broad endite distal margin with pappose, microserrate and simple setae, medial margin with row of 30 simple 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. 33F View FIGURE 33 ).

Maxilliped 1 basis produced distally as broad lobe, distal margin of lobe with 2 microserrate knoblike setae, 2 simple and 1 pappose setae, marings with 2 hook, 2 simple and 4 plumose setae; ischium absent; merus expanded distally, interface between merus and carpus diagonal rather than horizontal, with 1 tooth and pappose seta at distal corner; carpus with 14 pappose, 1 simple and 6 comb setae medially, lateral margin produced as large teeth, with pappose seta; propodus lateral margin produced as large teeth, with pappose seta, medial margin with 4 pappose and 2 simple setae; dactylus with 4 simple setae terminally ( Fig. 33G View FIGURE 33 ).

Maxilliped 2 basis 1.2 as long as all other articles together, with pappose seta medially, 1 pappose and 1 plumose setae at distolateral corner, distolateral corner expanded; ischium 0.08 basis length, with 2 pappose setae, produced as tooth distally; merus equal to ischium length, with pappose seta; carpus 4.4 merus length, with 7 pappose setae; propodus 0.7 carpus length, with 4 pappose, 2 plumose and 2 simple setae; dactylus 0.5 propodus length, with 4 simple setae ( Fig. 33H View FIGURE 33 ).

Maxilliped 3 basis 1.4 all other articles together, with 6 pappose and 3 plumose setae, not expanded distally; ischium 0.02 basis length, unarmed; merus 4.0 ischium length, with 3 pappose and 2 plumose setae; carpus 2.9 merus length, with 13 pappose setae; propodus 0.8 carpus length, with 10 pappose setae; dactylus 0.4 propodus length, with 4 simple setae terminally; exopod 0.9 basis length, basal article serrate, flagellum with plumo-annulate setae ( Fig. 33I View FIGURE 33 ).

Pereopod 1 basis longer than next 4 articles together, margins serrate distally, with 20 pappose and 1 simple setae; ischium 0.04 basis length, with 2 pappose setae; merus 2.3 ischium length, with 4 pappose setae; carpus 3.3 merus length, with 8 pappose setae; propodus 0.9 carpus length, with 6 pappose setae; dactylus broken; exopod 0.8 basis length, basal article with 4 pappose setae, flagellum with plumo-annulate setae ( Fig. 34A View FIGURE 34 ).

Pereopod 2 basis longer than next 4 articles together, with 3 pappose setae; ischium 0.05 basis length, with pappose seta and microserrate seta with single subterminal setule; merus 2.3 ischium length, with pappose seta and microserrate seta with single subterminal setule; carpus 4.9 merus length, with 7 pappose setae and 8 microserrate setae with single subterminal setule; propodus 0.2 carpus length, with 2 simple setae; dactylus 3.0 propodus length, with 3 simple setae terminally; exopod 0.8 s basis length, basal article with 5 pappose setae, flagellum with plumoannulate setae ( Fig. 34B View FIGURE 34 ).

Pereopod 3 basis 2.06 all other articles together, produced as single large tooth, with 3 pappose setae; ischium 0.06 basis length, with 4 simple setae; merus 1.75 ischium length, with 2 sipmle setae; carpus 1.6 merus length, with 1 simple and 2 annulate setae; propodus 0.7 carpus length, with 1 simple and 1 annulate setae; dactylus 0.6 propodus length, with 3 simple setae terminally; exopod rudimentary, 0.07 basis length, of 2 articles with 2 simple setae ( Fig. 34C View FIGURE 34 ).

Pereopod 4 basis 1.6 all other articles together, with 1 simple and 1 plumose setae; ischium 0.05 basis length, with simple seta; merus 3.0 ischium length, with 5 simple setae; carpus 1.4 merus length, with 2 simple and 1 annulate setae; propodus 0.6 carpus length, with annulate seta; dactylus 0.4 propodus length, with 2 simple setae terminally; exopod rudimentary, 0.09 basis length, of 2 articles with 2 simple setae ( Fig. 34D View FIGURE 34 ).

Pereopod 5 basis as long as next 4 articles together, with 1 plumose and 4 simple setae; ischium 0.2 basis length, with simple seta; merus 1.6 ischium length, with 2 simple setae; carpus 1.5 merus length, with 3 simple and 1 annulate setae; propodus 0.6 carpus length, with annulate seta; dactylus 0.7 propodus length, with 3 simple setae terminally ( Fig. 34E View FIGURE 34 ).

Telson 2.8 length of pleonite 6, with 4–5 lateral setae with single subterminal setule, 3 simple terminal setae ( Fig. 34F View FIGURE 34 ).

Uropod peduncles 3.0 length of pleonite 6, 1.05 telson length. Uropod endopod 0.75 peduncle length; article 1 1.2 articles 2 and 3 together, with 12 setae with single subterminal setule medially; article 2 0.3 article 1 length, with 4 setae with single subterminal setule medially; article 3 1.4 article 2 length, with 5 setae with single subterminal setule medially, terminal seta with single subterminal setule 0.7 article 3 length. Uropod 0.95 length of endopod; article 1 equal to article 2 length, with 5–6 simple setae laterally; article 2 with 7–8 setae with single subterminal setule laterally, 6 setae with single subterminal setule medially, terminal seta with single subterminal setule 0.6 article 2 length ( Fig. 34F View FIGURE 34 ).

Paratype adult male, AM P 101482 .

Adult male, 10.0 mm. Carapace dorsoventrally flattened, anterior margin concave in dorsal view, marginal carina with fine serrations, frontal lobe with medial carina; pereonites 1–3 with paired dorsal tubercles, pereonites 3–5 with unpaired ventral processes; pseudorostral lobes 0.35 carapace length; eyelobe 0.06 carapace length, with 2 lenses; carapace 1.5 length of pereonites together ( Fig. 35A, B View FIGURE 35 ).

Antennule peduncle article 1 longest, margin serrate, with 9 plumose setae; article 2 0.6 article 1 length, margin serrate, with 5 plumose setae; article 3 0.6 article 2 length, unarmed; main flagellum of 4 articles, first article expanded with many aesthetascs, with 2 aesthetascs terminally; accessory flagellum of 2 articles, 1.1 main flagellum article 1 length, with 3 simple setae ( Fig. 35C View FIGURE 35 ).

Antenna peduncle of 5 articles; article unarmed; article 2 with pappose seta; article 3 unarmed; article 4 and 5 with ranks of setae; flagellum extending to posterior border of pleonite 6, articles short ( Fig. 35D View FIGURE 35 ).

Maxilliped 3 basis 1.4 as long as all other articles together, with 7 simple, 8 pappose and 2 plumose, distal corner not expanded; ischium 0.04 basis length, unarmed; merus 3.0 ischium length, with 2 pappose and 2 plumose setae; carpus 2.5 merus length, with 13 pappose setae; propodus 0.9 carpus length, with 7 pappose and 4 plumose setae; dactylus 0.4 propodus length, with 3 simple setae terminally; exopod 0.9 basis length, basal article with pappose seta, flagellum with plumo-annulate setae ( Fig. 35E View FIGURE 35 ).

Pereopod 1 basis 1.2 all other articles together, margin serrate, margin with hyaline fringe, with 11 pappose setae; ischium 0.03 basis length, with pappose seta; merus 3.0 ischium length, with 2 pappose setae; carpus 3.0 merus length, with hyaline fringe, with 1 pappose and 6 simple setae; propodus 0.95 carpus length, with hyaline fringe, with 6 simple setae; dactylus 0.5 propodus length, with 4 simple setae terminally; exopod 0.9 basis length, basal article with 4 pappose setae, flagellum with plumo-annulate setae ( Fig. 35F View FIGURE 35 ).

Pereopod 2 basis longer than next 4 articles together, with hyaline fringe, 4 pappose setae; ischium 0.04 basis length, with microserrate seta with single subterminal setule; merus 3.3 ischium length, with pappose seta and microserrate seta with single subterminal setule; carpus 4.4 merus length, with 1 simple, 1 plumose and 9 microserrate setae with single subterminal setule; propodus 0.2 carpus length, unarmed; dactylus broken; exopod equal to basis length, basal article with 3 pappose setae, flagellum with plumo-annulate setae ( Fig. 36A View FIGURE 36 ).

Pereopod 3 basis 1.7 all other articles together, with hyaline fringe, 16 pappose setae; ischium 0.05 basis length, with 3 simple setae; merus 2.3 ischium length, with simple seta; carpus 1.3 merus length, with 1 simple and 1 annulate setae; propodus 0.7 carpus length, with annulate seta; dactylus 0.7 propodus length, with 3 simple setae terminally; exopod 0.8 basis length, basal article with 3 plumose setae, flagellum with plumo-annulate setae ( Fig. 36B View FIGURE 36 ).

Pereopod 4 basis 1.3 all other articles together, with hyaline fringe, 1 pappose and 5 simple setae; ischium 0.07 basis length, with 2 simple; merus 2.3 ischium length, with 1 simple and 1 annulate setae; carpus 1.5 merus length, with annulate seta; propodus 0.6 carpus length, with annulate seta; dactylus 0.7 propodus length, with 3 simple setae terminally; exopod0.9 basis length, basal article with 3 pappose setae, flagellum with plumo-annulate setae ( Fig. 36C View FIGURE 36 ).

Pereopod 5 basis as long as next 4 articles together, with 1 simple and 5 pappose setae; ischium 0.1 basis length, with 1 pappose and 2 annulate setae; merus 1.75 ischium length, with annulate seta; carpus 1.7 merus length, with 2 simple and 2 annulate setae; propodus 0.6 carpus length, with annulate seta; dactylus 0.9 propodus length, with 2 simple setae terminally ( Fig. 36D View FIGURE 36 ).

Pleopod 1 biramous, basal article with 5 pappose setae; medial ramus with projection, both rami with long plumo-annulate setae ( Fig. 36E View FIGURE 36 ).

Pleopod 2 broken, not illustrated

Pleopod 3 biramous, basal article with 5 pappose setae; medial ramus with projection, both rami with long plumoannulate setae ( Fig. 36F View FIGURE 36 ).

Telson 3.2 length of pleonite 6, with 4 pairs lateral setae with single subterminal setule, 3 simple terminal setae, longer than lateral setae ( Fig. 36G View FIGURE 36 ).

Uropod peduncles 3.4 pleonite 6 length, 1.1 telson length. Uropod endopod 0.8 peduncle length; article 1 with 21 microserrate setae with single subterminal setule medially; article 2 0.4 article 1 length, with 5 microserrate setae with single subterminal setule medially; article 3 1.3 article 2 length, with 5 microserrate setae with single subterminal setule medially, 2 simple setae laterally, simple terminal seta 0.7 article 3 length. Uropod exopod article 2 broken ( Fig. 36G View FIGURE 36 ).

Etymology. The species is named concavus in reference to the concave anterior margin in the dorsal view.

Depth. 592–720 m.

Distribution. Victoria, New South Wales and Tasmania, Australia, 33– 42°S, 148– 152°E.

Remarks. The new species can be differentiated from Misceolamprops dolorsae by the carapace morphology and uropod peduncle. In the new species, the branchial regions of the carapace are not inflated, while in M. dolorsae the branchial regions are inflated. In the new species, the uropod peduncles have at least seven setae medially, while in M. dolorsae the uropod peduncles have no more than four setae medially.