Chauliopleona amdrupii ( Hansen 1913 ),

Bird, Graham John, 2015, Tanaidacea (Crustacea: Peracarida) of the northeast Atlantic: Chauliopleona Dojiri and Sieg, 1997 and Saurotipleona n. gen. from the ‘ Atlantic Margin’, Journal of Natural History 49 (25), pp. 1507-1547: 1515-1519

publication ID 10.1080/00222933.2015.1005715

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Chauliopleona amdrupii ( Hansen 1913 )


Chauliopleona amdrupii ( Hansen 1913) 

( Figures 2–4View Figure 2View Figure 3View Figure 4, 18View Figure 18)

Leptognathia Amdrupii Hansen, 1913: 81–82  , pl. VIII figs. 2a– c

Leptognathia amdrupi: Nierstrasz 1913: 30  ; Stephensen 1932: 347; Stephensen 1937: 23; Stephensen 1943: 36, 63; Just 1970: 24; else, see Sieg 1983

Chauliopleona amdrupii: Guerrero-Kommritz 2005: 1184–1187  , figs 3–4; else, see Anderson 2013


Cephalothorax 1.4 times longer than broad (ltb). Pereonites 1–6 all shorter than broad, with parallel lateral margins. Pleon shorter than cephalothorax, without posteriodorsal protuberances; pleonites 1–4 sternite with low recurved subrectangular process. Antennule article-1 (1.25 times) longer than rest of antennule. Maxilliped bases with short distal seta. Cheliped merus without inferior protuberance; carpus relatively slender, twice as long as broad, inferior shield shallow (aspect ratio ≈ 0.2), subtriangular, distal margin not angular; fixed finger with four teeth; dactylus superior margin smooth. Pereopods 1–3 basis with marginal setules; carpus and propodus inferior spinules fine to moderate; pereopods 2–3 carpus with distomedial seta. Pereopods 4–6 ischium with two short setae. Uropod exopod just over half the length of endopod segment-1; endopod slender,> three times longer than peduncle.

Material examined

One non-ov. ♀, BIOICE Stn 2257; one non-ov. ♀, BIOICE Stn 2697; one non-ov. ♀, BIOICE Stn 2701; two non-ov. ♀♀, BIOICE Stn 2849; five non-ov. ♀♀, three prep. ♂♂, BIOICE Stn 2853; eight non-ov. ♀♀, three prep. ♂♂, BIOICE Stn 3280; four non-ov. ♀♀ (one dissected on microslide), BIOICE Stn 3282; three non-ov. ♀♀, BIOICE Stn 3518; one non-ov. ♀, BIOICE Stn 3528; two non-ov. ♀♀ BIOICE Stn 3531; three non-ov. ♀♀, one prep. ♂, BIOICE Stn 3532  .


Non-ovigerous female. Body length 2.44–3.64 mm, cf. 2.7 mm, Hansen (1913), and 3.2 mm, Guerrero-Kommritz (2005). Preparatory male: body length 2.96–3.16 mm.

Distribution records from the AFEN, BIOICE and BIOFAR area

Eleven records from the BIOICE survey: three from the Irminger Basin 1042–1209 m, eight from the Iceland Basin, 988–1840 m. All have positive bottom temperatures of 2.4–4.2°C, with various sediment types including ‘clay’, ‘silty sand’, and ‘shell-sand’  .

Distribution elsewhere

Originally described from Forsblad Fjord, East Greenland, 73–165 m ( Hansen 1913); other records are from Jörgen Brönlund Fjord, East Greenland, 160–180 m ( Just 1970), and the Greenland Sea, 188–191 m ( Guerrero-Kommritz 2005).


This species of Chauliopleona  is characterised by a relatively slender cheliped carpus that has a low-aspect ratio (shallow) sub-rectangular shield ( Figure 3HView Figure 3) and a slightly recurved sternal process on pleonites 1–4 ( Figure 2CView Figure 2). The basal setae of the maxilliped ( Figure 3GView Figure 3) are also relatively short compared to those in C. armata  and C. hastata  . There is some discrepancy between the present specimens and the specimen illustrated by Guerrero-Kommritz (2005) in the size of the inferior propodal spinules on pereopods 1–3: his material, one specimen from the Greenland Sea, has robust spinules (also on the carpus), whereas the current material has both weak and moderate setules ( Figure 4A– CView Figure 4). This better corresponds to Hansen’ s description of ‘second pair of legs [pereopod-1] without spinules on the posterior margin of sixth joint [propodus]’ ( Hansen 1913, p. 81). The presence of a distomedial seta on the carpus of pereopods 2–3 is another possible distinguishing character from C. armata  and C. hastata  .

This species is partly sympatric with C. armata  and C. hastata  in the Irminger Basin and its depth and geographic distributions indicate polar emergence.














Chauliopleona amdrupii ( Hansen 1913 )

Bird, Graham John 2015

Leptognathia Amdrupii Hansen, 1913: 81–82

Hansen HJ 1913: 82

Leptognathia amdrupi:

Just J 1970: 24
Stephensen K 1943: 36
Stephensen K 1937: 23
Stephensen K 1932: 347
Nierstrasz HF 1913: 30

Chauliopleona amdrupii: Guerrero-Kommritz 2005: 1184–1187

Guerrero-Kommritz J 2005: 1187