Epikopais waringa, Merrin, 2009

Merrin, Kelly L., 2009, Epikopais gen. nov. (Isopoda: Asellota: Munnopsidae), a new genus of munnopsid isopod with three new species from the south-western Pacific., Memoirs of Museum Victoria 66 (1), pp. 129-145 : 139-144

publication ID

https://doi.org/ 10.24199/j.mmv.2009.66.14

DOI

https://doi.org/10.5281/zenodo.12211986

persistent identifier

https://treatment.plazi.org/id/03B887E9-FFAD-FFEB-793D-FC820BB86574

treatment provided by

Felipe

scientific name

Epikopais waringa
status

sp. nov.

Epikopais waringa View in CoL sp. nov.

Figures 8–11 View Figure 8 View Figure 9 View Figure 10 View Figure 11

Material examined. All material from south-eastern Australia. Holotype. Female (2.0 mm), off Freycinet Peninsula, Tas., stn SLOPE 47 , 41°58.60'S, 148°38.80'E, 27 July 1986, WHOI GoogleMaps epibenthic sled, 500 m, RV Franklin, coarse shell ( NMV J18860 About NMV ). Paratypes. 1 female (2.0 mm), type locality, ( NMV J54113 About NMV ). 1 male (1.5 mm, dissected), south of Point Hicks , Vic., stn SLOPE 34 , 38°16.40'S, 149°27.60'E, 23 July 1986, WHOI GoogleMaps epibenthic sled, 800 m RV Franklin, ( NMV J18859 About NMV ) .

Additional material. 1 female, south of Point Hicks , Vic., stn SLOPE 32 , 38°21.90'S, 149°20.0'E, 23 July 1986, WHOI GoogleMaps epibenthic sled, 1000 m RV Franklin ( NMV J18858 About NMV ) .

Description. Female. Body length 1.6 times pereonite 2; cuticle not highly calcified, smooth. Cephalon anterior margins with few scattered setae; anterior cephalic flanges flap-like. Pereonites 1–4 anterior margins with SS, pereonite 5 anterior margin smooth; anterolateral margins of pereonites 3 and 4 with small lobes; pereonites 6 and 7 ventrally with no ornamentation. Pleon length 0.7 times proximal width, with scattered SS.

Antenna 1 of 8 articles; article 1 with distal extension, length 1.8 times width, distal margin with 1 RS, 2 SS and 1 penicillate seta, distal extension with 1 penicillate seta; article 2 length 0.5 times article 1 length, distal margin with 2 penicillate setae; article 4 with 2 penicillate setae; terminal article with 1 SS and 1 aesthetasc.

Operculum length 4.1 times proximal width, medial keel wide, flat, rounded, with few plumose setae and laterally with many fine SS, distal surface with 1 plumose seta and few scattered SS, distally with medial excision, margins anterolaterally with 5 sub-marginal SS (2+3), laterally with numerous plumose setae.

Male. Antenna 1 of 31 articles; article 1 length 1.6 times width, distal margin with 3 sensillate RS, 1 penicillate seta and 1 SS, distal extension with 1 sensillate RS; article 2 length 0.5 times article 1 length, distal margin with 2 penicillate setae; article 3 with 1 SS; article 4 with 2 penicillate setae; article 7 with 1 SS; terminal article with 1 SS and 1 aesthetasc. Antenna 2 damaged; article 1 lateral margin with 1 RS, surface with 2 SS; article 2 length 1.3 times article 1 length, distolateral margin with 2 RS distally with 2 SS; article 3 length 1.4 times article 1 length with 2 sensillate RS and 3 RS along distal rim, scale with 1 RS; article 4 length 1.7 times article 1 length, with no ornamentation.

Mandible spine row present, with 3 short spines; molar distally with 2 serrate setae. Maxilla 1 lateral and mesial margins with fine SS; lateral lobe width 1.5 times mesial lobe width, distal margin with few fine SS, 10 RS and 2 dentate RS, mesial lobe distally with 3 SS, few fine SS and 2 long pectinate setae. Maxilla 2 lateral lobe margins with fine SS; middle lobe as wide as lateral lobe; mesial lobe width 1.7 times lateral lobe width, mesial and distal margins with fine SS, distally with 7 setae (unable to identify type) and 1 long pectinate seta. Maxilliped coxa length 1.7 times width, and length 0.5 times basis length; basis length 4.2 times width, with 1 SS; endite with 2 coupling hooks, 2 toothed setae, 4 fan setae and few fine SS; palp article 1 distomesial margin with 1 SS; article 2 length 4.2 times article 1 length, lateral margin with cuticular scales and 1 SS, mesial margin with 2 distally pappose setae and 1 SS; article 3 length 1.9 times article 1 length, lateral margin with 1 SS, mesial margin with 2 SS and 4 distally pappose setae; article 4 length 0.8 times article 1 length, lateral margin with 1 SS and 2 distally pappose setae; article 5 length 0.6 times article 1 length, with 2 SS and 2 distally pappose setae; epipod length 1.6 times width, margins with cuticular scales.

Pereopod 1 basis length 4.6 times width, inferior margin with cuticular scales, and 3 SS, superior margin with 2 SS and 1 penicillate seta; ischium length 3.5 times width, inferior margin with 1 SS and cuticular scales, superior margin with 1 SS; merus length 1.3 times width, inferior margin with 3 SS, lateral surface with 1 SS, distosuperior margin with 2 SS; carpus length 3.6 times width, inferior margin with 2 SS and cuticular scales, superior margin with 2 SS; propodus length 4.9 times width, inferior margin with 5 SS (4 distally), distosuperior margin with 2 SS; dactylus length 2.6 times proximal width, distosuperior margin with 3 SS.

Pereopod 5 basis length 3.0 times width, inferior margin with 3 SS, superior margin with 1 sensillate RS, 2 penicillate setae and 1 SS; ischium length 1.8 times width, inferior margin with 2 SS, superior margin with 1 SS; merus length 1.3 times width, inferior margin with 4 SS, distosuperior margin with 1 SS and 1 plumose seta; carpus length 1.3 times width, lateral surface with 1 SS; propodus length 2.5 times width, lateral surface with 2 SS, distosuperior margin with 1 sensillate RS and 1 penicillate seta; dactylus length 2.7 times proximal width, with 4 small SS.

Pereopod 6 basis length 3.7 times width, inferior margin with 7 SS and 1 penicillate seta; ischium length 1.9 times width, inferior margin with 3 SS; merus length 1.4 times width, inferior margin with 3 SS, distosuperior margin with 1 SS and 1 plumose seta; carpus length 1.1 times width; propodus length 2.9 times width, distally with 1 SS, superior margin with 2 RS and 1 penicillate seta; dactylus length 3.1 times proximal width, with 4 small distal SS.

Pereopod 7 basis missing; ischium length 2.9 times width, inferior margin with 5 SS; merus length 1.3 times width, inferior margin with 2 SS, distosuperior margin with 1 plumose setae and 1 SS; carpus length 1.7 times width, distosuperior margin with 1 SS; propodus length 5.2 times width, distosuperior margin with 1 sensillate RS and 1 penicillate seta; dactylus length 7.1 times proximal width, superior margin with 2 SS; unguis damaged.

Male pleopod 1 length 6.7 times proximal height, central margin with 8 SS, distally with 7 SS. Male pleopod 2 protopod length 2.2 times width, lateral margin with row of plumose setae, surface with 2 SS, distally with lamellar extension, mesial margin with 3 SS; exopod length 0.2 times protopod length with fine SS; stylet long, hooked up into protopod, length 2.5 times protopod length; sperm duct length 0.8 times stylet length. Pleopod endopod length 1.5 times width, with 3 long plumose setae; exopod with 4 long plumose setae and 1 SS. Pleopod 4 endopod length 1.3 times width. Pleopod 5 length 1.5 times width.

Uropod protopod length 1.3 times width, lateral margin with 3 plumose setae, distal margin with 1 plumose setae and 6 robust SS, mesial margin with 1 plumose seta, surface with 3 SS; exopod length 0.5 times protopod length, with 2 SS; endopod length 0.7 times protopod length, with 4 SS and 1 penicillate seta.

Remarks. Epikopais waringa sp. nov. is defined by: the wide body, which is about 0.7 times as wide as long; anterior margins of pereonites 1–4 with few simple setae; and the triangular operculum keel. For further discussion refer to the comments for E. mystax sp. nov.

Distribution. South-eastern Australia, from Point Hicks, Victoria to Freycinet Peninsula, Tasmania, between 500 and 1000 metres.

Etymology. Waringa is an Aboriginal word meaning sea; noun in apposition.

WHOI

Woods Hole Oceanographic Institution

RV

Collection of Leptospira Strains

NMV

Museum Victoria

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Isopoda

Family

Munnopsidae

Genus

Epikopais

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF