Macrochiridothea kruimeli Nierstrasz 1918
- Dataset
- A new species of Chaetiliidae (Crustacea: Isopoda: Valvifera) from the Río de la Plata estuary, Argentina-Uruguay, and reconsideration of Macrochiridothea and Chiriscus
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Isopoda
- family
- Chaetiliidae
- genus
- Macrochiridothea
- species
- Macrochiridothea kruimeli
diagnosis
Diagnosis. Total body length of male 8 mm; female 15 mm. Dorsal surface rugose, posterior pereonites and pleonites with median ridge; pleotelson smooth. Lateral lobes on head acute. Coxa 6 reaching posteriorly to pleonite 3. Antenna 1 peduncle article 2 without anterodistal prolongation. Antenna 2 peduncle, article 4, 2.2 times as long as greatest width; article 5, 8 times as long as greatest width. Pereopods 2 and 3 dactyli subchelate, closing on truncate palm. Pereopod 5 ischium without a prominent hook on upper margin. Pleopod 2, appendix masculina straight, apex laterally denticulate.
discussion
Remarks. Nierstrasz’s (1918) drawings are small and his photograph difficult to interpret. Sheppard (1957) added details of antennae and mouthparts from a male taken east of southern Argentina (49 ° 29´S, 66 ° 21´W, 104 – 107 m depth; Discovery stn WS 809). The species is characterised its large size and a rugose dorsum but is otherwise similar to M. setifer.
distribution
Distribution. Southern Chile and off southern Argentina; to 107 m depth.
materials_examined
Material. Holotype: Punta Arenas, 53 ° 09 ' S, 70 ° 55 ' W, Chile, ZMA (female, 15 mm).