Acanthaspidia matsi Timm, Kaiser & Brandt, 2013, sp. nov.

• Main Authors: Timm, Marlene, Kaiser, Stefanie, Brandt, Angelika
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Acanthaspidiidae; Acanthaspidia; Acanthaspidia matsi; Weddell Sea
• Online Access: https://doi.org/10.5281/zenodo.5690599; http://treatment.plazi.org/id/03F387EBFF99FFDEF1FF2710FC2CFD65

Acanthaspidia matsi sp. nov. (Figs 2–12) Etymology. The new species is dedicated to the first author’s brother Mats . Type fixation. Holotype: non-ovigerous female, 12.5 mm long; ZMH K-43191, designated here. Material examined. Holotype: non-ovigerous female, 12.5 mm long, ANDEEP III, RV Polarstern, EBS, station 133-2, 62°46.73’S – 62°46.33’S, 53°02.57’W – 53°04.14’W, 1584 m, 16.03.2005, ZMH K-43191; Paratypes: 1 adult male, 9.3 mm long, ZMH K-43192; 1 non-ovigerous female (head damaged), ZMH K-43193; 1 nonovigerous female, 12 mm long, ZMH K-43194; 1 adult male (head damaged), ZMH K-43195; 1 adult male, 10.3 mm long, ZMH K-43196; 1 non-ovigerous female, ZMH K-43197; 1 non-ovigerous female, ZMH K-43198; 1 non-ovigerous female, ZMH K-43199, carbon-coated for SEM; 1 non-ovigerous female, ZMH K-43198, carboncoated for SEM; 1 adult male, ZMH K-43199, carbon-coated for SEM; 1 adult male, ZMH K-43200, carbon-coated for SEM; 1 non-ovigerous female, ZMH K-43299, carbon-coated for SEM; 31 specimens (2 adult male, 17 nonovigerous female, 10 juvenile female and 2 manca 2), ZMH K-43201; 31 specimens (2 adult male, 3 non-ovigerous female, 25 juvenile female and 1 manca 3), ZMH K-43202. 1 specimen (non-ovigerous female), ZMH K-43284. All specimens were collected from the same station as holotype. Type locality. Powell Basin, Weddell Sea, 1584 m. Distribution. Only known from type locality. Diagnosis. Cephalothorax width 3.0 times length, with strongly trifid rostrum, each tip length 0.4 times rostrum length. Lateral margins of pereonites 5–7 trifid, pereonites 1, 3, 4 and 6 with 2 strong mid-dorsal spines. Pleotelson spinulated, width 2.3 times length, with 2 strong mid-dorsal spines, lateral margins serrated with 9 spines. Peduncular article 3 of antenna with 2 pointed lateral spines. Description of holotype and paratype female. Habitus (Figs 2 A – C, F). Body dorsoventrally flattened, scattered with tiny setae on lateral margins of pereonites and pleotelson, widest at pereonites 5 and 6; body length 1.4 times pereonite 5 ...