Corresponding author: Brenda L. Doti (
Academic editor: Saskia Brix
A new species of
Paramunnidae Vanhöffen, 1914 is a large family of asellote isopods; at present it includes 42 genera, many of them recently erected (see
To date species in the genus
Specimens of
For the taxonomic description some specimens were stained with Chlorazole Black E®, and their appendages were dissected and temporarily mounted in glycerine. Pencil drawings of the whole animal and dissected appendages were prepared using a Carl Zeiss (Axioskop 2) compound microscope equipped with a camera lucida. Digital illustrations were made with a Wacom tablet and the Adobe Illustrator program following
The length of the head, pereonites, free pleonite, and pleotelson were all estimated along the mid-dorsal line. The width of the head was measured between the tips of the eyestalks. Body length as well as lengths of the articles of the appendages were measured according to
The material examined of
1 | Lateral margins of all pereonites produced into 2 processes | |
– | Lateral margins of at least one pereonite produced into a single process | 2 |
2 | Lateral margins of pereonite 1 produced into a single process, remaining pereonites produced into 2 processes | |
– | Lateral margin of pereonites 2–4 produced into a single process, remaining pereonites rounded | 3 |
3 | Male: pereonites 1–6 with a pair of granulate humps mid-dorsally, pereonite 7 and free pleonite with a single granulate hump. Female: all pereonites and free pleonite with a single granulate hump | |
– | Male: pereonites 1 and 2 with a pair of granulate humps mid-dorsally, remaining pereonites and free pleonite with a single granulate hump. Female: unknown |
Ross Sea, RV
Males with dorsal sculpture formed by a pair of granulate humps on pereonites 1–6, and a single granulate hump on pereonite 7 and free pleonite. Females with single granulate hump on all pereonites and free pleonite; hump on pereonite 1 widest and shallowest, following humps gradually becoming narrower and higher towards distal end. Lateral margins of pereonites 1 and 5–7 rounded, those of pereonites 2–4 produced into single process. Coxae rounded, visible dorsally on pereonites 5–7 only.
(body description based on the holotype male, description of appendages based on a paratype male).Body (
Antennula (
Antenna (
Left mandible (
Maxillula (
Maxilla (
Maxilliped (
Pereopod I (
Pereopods II–VII (
Pleopod I (
Pleopod II (
Pleopod III (
Pleopod IV (
Pleopod V (
Uropod (
(
Only known from type locality (
The species name refers to the type locality, the Ross Sea.
Because of the dorsal ornamentation and the lateral margins of the pereonites
Geographic distribution of the
Character comparison of the species included in
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Prns. 1–7 produced into two processes | One smooth conical hump on each segment (without sexual dimorphism; José Castelló, pers. comm.) | Not visible | 2–5 RS* | 5–9* | ||
Prn. 1 produced into a single process, prns. 2–7 produced into two processes | One smooth conical hump on each segment(sexual dimorphism unknown) | Not visible | Unknown | 3.5 | ||
Prns. 1 and 5–7 rounded, prns. 2–4 produced into a single process | Two granulate humps on prns. 1–2, single granulate hump on remaining segments(sexual dimorphism unknown) | Visible on prns. 5–7 only | 2 RS | 2.1 | ||
Prns. 1 and 5–7 rounded, prns. 2–4 produced into a single process | ♂♂: two granulate humps on prns. 1–6, single granulate hump on remaining segments | ♀♀: single granulate hump on all segments, hump on prn. 1 widest and shallowest | Visible on prns. 5–7 only | 2 RS | 0.9–1.7 |
At present, the genus
The four species belonging to
Records from the remaining three species of
The authors are grateful to the crew of the RV