A generic review of the lysianassoid family Uristidae and descriptions of new taxa from Australian waters (Crustacea, Amphipoda, Uristidae)
Author
Lowry, J. K.
Author
Kilgallen, N. M.
text
Zootaxa
2014
2014-09-26
3867
1
1
92
journal article
3965
10.11646/zootaxa.3867.1.1
e5bb465f-e713-45c1-8e0f-2c6125494b44
1175-5326
5585734
B7C6EC5F-5AA3-43B1-BD3D-D8111E0EC3A7
Parschisturella martrudan
sp. nov.
(
Figs 30–32
)
Types.
Holotype
, female, 12.0 mm,
AM
P.69042, east of
Broken Bay
,
New South Wales
,
Australia
(
33°37'S
152°04'E
to 33°39’S 152°02’E),
896–923 m
, dredge,
10 December 1980
,
R
.
T
. Springthorpe,
FRV
Kapala
[K80-20- 09]
.
Paratypes
:
1 male
,
10.2 mm
,
AM
P.69044, north-east of
Port Jackson
,
New South Wales
,
Australia
(
33°41’S
152°00’E
to 33°44’S 151°57’E),
820–888 m
, beam trawl,
11 February 1986
,
R
.
T
. Springthorpe,
FRV
Kapala
[K86-01-07]
;
1 female
,
12.8 mm
,
AM
P.69045, east of
Broken Bay
,
New South Wales
,
Australia
(
33°30’S
152°09’E
to 33°33’S 152°11’E),
922–1015 m
, beam trawl,
12 February 1986
,
R
.
T
. Springthorpe,
FRV
Kapala
[K86-01-08]
.
Type
locality.
East of Broken Bay
,
New South Wales
,
Australia
(
33°37'S
152°04'E
to
33°39’S
152°02’E
),
896–923 m
depth
.
FIGURE 30.
Parschisturella martrudan
sp. nov.
,
holotype, female, 12.0 mm, AM P.69042, from east of Broken Bay, New South Wales, Australia.
Additional material described.
New South Wales
.
1 specimen
,
AM
P.44445, off
Wollongong
(
34°32.25'S
151°15.16'E
),
300 m
,
baited trap
,
6 May 1993
–
7 May 1993
,
P. Freewater
& party,
MV
Robin E
[NSW-782]
;
3 specimens
,
AM
P.69041, east of
Broken Bay
(
33°31’S
152°08’E
to 33°33’S 152°07’E),
914 m
,
2.5 m
sled dredge,
10 December 1980
,
R
.
T
.
Springthorpe
,
FRV
Kapala
[K80-20-08]
;
2 females
,
AM
P.69043, east of
Broken Bay
(
33°37’S
152°04’E
to 33°39’S 152°02’E),
896–923 m
, dredge,
10 December 1980
,
R
.
T
.
Springthorpe
,
FRV
Kapala
[K80-20-09]
;
1 male
,
AM
P.69046, east of
Broken Bay
(
33°30’S
152°09’E
to 33°33’S 152°11’E),
922–1015 m
, beam trawl,
12 February 1986
,
R
.
T
.
Springthorpe
,
FRV
Kapala
[K86-01-08]
;
1 specimen
,
AM
P.69047, east of
Broken Bay
(
33°30’S
152°12’E
to 33°33’S 152°09’E),
1053–1066 m
, beam trawl,
12 February 1986
,
R
.
T
.
Springthorpe
,
FRV
Kapala
[K86-01-10]
.
Tasmania
.
16 specimens
,
AM
P.51146;
8 specimens
,
AM
P.51164, east of
Fortescue Bay
(
43°08.97’S
148°15.37’E
),
1000 m
,
baited trap
,
16–17 April 1993
,
J.K. Lowry
&
P. Freewater
,
MV
Tasmanian Enterprise
[TAS-365 & TAS-367];
539 specimens
,
AM
P.51176;
503 specimens
,
AM
P.51179, east of
Fortescue Bay
(
43°08.97’S
148°15.37’E
),
1000 m
,
baited trap
,
17–18 April 1993
,
J.K. Lowry
&
P. Freewater
,
MV
Tasmanian Enterprise
[TAS-383 & TAS-384];
5 specimens
,
AM
P.51310;
10 specimens
,
AM
P.51313;
41 specimens
,
AM
P.51381;
180 specimens
,
AM
P.57977, east of
Fortescue Bay
(
43°08.97’S
148°15.37’E
),
1000 m
,
baited trap
,
8–9 April 1994
,
J.K. Lowry
&
K. Dempsey
,
MV
Martrudan
[TAS-401, TAS-403 & TAS-422-423];
43 specimens
,
AM
P.51357, east of
Fortescue Bay
(
43°08.97’S
148°15.37’E
),
1000 m
,
baited trap
,
9–10 April 1994
,
J.K. Lowry
&
K. Dempsey
,
MV
Martrudan
[TAS-419];
315 specimens
,
AM
P.51388;
1 specimen
,
AM
P.56090, east of
Fortescue Bay
(
43°08.97’S
148°15.37’E
),
1000 m
,
baited trap
,
9–10 April 1994
,
J.K. Lowry
&
K. Dempsey
,
MV
Martrudan
[TAS-421];
many specimens,
AM
P.73705,
76.8km
south-south-east of
South East
Cape
,
Main Pedra Hill
(
44°15.6'S
147°07.8'E
),
1312 m
,
baited trap
,
21–24 January 1997
,
CSIRO
party,
FRV
Southern Surveyor
[SS01/97/ 08].
4 specimens
,
NMV
J67753
,
48
km east-north-east of
Cape
Tourville
(
42°00.25'S
148°43.55'E
to 41°57.77'S 148°42.08'E), 1264–
1130 m
, gravel with lumps of sandy mud aggregate,
WHOI
epibenthic sled,
30 October 1988
,
G.C.B. Poore
et al.,
RV
Franklin
[
SLOPE 81
];
19 specimens
,
NMV
J67754
, off
Freycinet Peninsula
(
42°2.20 'S
148°38.70'E
),
800 m
, coarse shelly sand,
WHOI
epibenthic sled,
27 July 1986
,
M.F. Gomon
et al.,
RV
Franklin
[
SLOPE 45
]
.
Victoria
.
2 specimens
,
NMV
J67755
, south of
Point Hicks
(
38°19.60'S
149°24.30'E
),
930 m
, rock, rubble, clay, sand, biogenic sediment,
WHOI
epibenthic sled,
23 July 1986
, M.F.
Gomon
et al.,
RV
Franklin
[
SLOPE 33
]
.
Etymology.
Named for the beautiful crayfishing boat MV
Martrudan
which collected many of the amphipods used in this and other studies of Australian lysianassoid amphipods; used as a noun in apposition.
Description.
Based on
holotype
, female, 12.0 mm, AM P.69042. Head, lateral cephalic lobes subtriangular, apically subacute. Antenna 1 peduncular article 1 without anterodistal lobe; accessory flagellum not forming cap, 5-articulate, terminal article not offset; primary flagellum with strong 1-field callynophore; robust setae absent from proximal articles; calceoli absent. Antenna 2 peduncular article 3 short, articles 3 to 5 not enlarged, brush setae absent; flagellum short; calceoli absent. Labrum, epistome and upper lip separate; epistome less produced than upper lip, straight; upper lip produced, strongly acute apically. Mandible incisor large, left and right symmetrical; molar with asymmetrically reduced column, proximally setose, distally triturating; palp attached about midway, article 2 margins subparallel, article 3 blade-like.
Maxilla 1
outer plate setal-tooth 7 present, left and right symmetrical,
cuspidate distally along inner margin
; palp distal margin with apical robust setae. Maxilliped outer plate with one slender and one broad apical robust setae.
Gnathopod 1 simple; coxa large, about as long as coxa 2, subrectangular with straight anterior margin; basis moderately to densely setose along anterior margin; ischium long (length 2 × to 4 × breadth); carpus long (length 2 to 4 × breadth), slightly longer than propodus, without posterior lobe; propodus margins tapering distally; dactylus simple.
Gnathopod 2 propodus palm transverse, dactylus distinctly shorter than palm
. Pereopod 4 coxa with a well-developed posteroventral lobe. Pereopod 5 coxa without distinct lateral ridge; basis about as long as broad, posterior margin weakly or not serrate. Pereopod 7 basis posterodistally produced less than halfway along merus.
Pleonite 3 without mid-dorsal carina, not produced dorsodistally, posterodorsal margin not produced. Epimeron 3 posterior margin smooth, posteroventral corner acutely produced, forming weak spine.
Urosomite 1
not projecting over urosomite 2,
dorsally rounded
.
Uropod 2 inner ramus with slight constriction
. Uropod 3 peduncle without dorsolateral flange; outer ramus article 2 short, with few plumose setae on inner ramus.
Telson moderately cleft
, without dorsal robust setae, with 2 apical robust setae on each lobe.
Sexually dimorphic characters.
Based on
paratype
male,
10.2 mm
, AM P.69044. Antenna 1 primary flagellum with strong 2-field callynophore; robust setae absent from proximal articles; calceoli present. Antenna peduncular brush setae present; calceoli present. Uropod 3 peduncle without dorsolateral flange; outer ramus article 2 short, with plumose setae on both rami.
Depth range.
820–1312 m
.
Remarks.
Parschisturella martrudan
and
P. simplex
appear to be the only species with truly simple first gnathopods. In
Parschisturella martrudan
the cusps on the medial margin of setal-tooth 7 are distal in
P. martrudan
(along most of the medial margin in
P. simplex
); the gnathopod 2 dactylus is shorter than the palm in
P. martrudan
(fitting the palm in
P. simplex
); the dorsal margin of urosomite 1 is evenly rounded in
P. martrudan
(straight in
P. simplex
) and the telson is moderately cleft (deeply cleft in
P. simplex
).
FIGURE 31.
Parschisturella martrudan
sp. nov
, holotype, female, 12.0 mm, AM P.69042, from east of Broken Bay; paratype, male, 10.2 mm, AM P.69044, from north-east of Port Jackson, New South Wales, Australia. Scale bars: 0.2 mm.
FIGURE 32.
Parschisturella martrudan
sp. nov.
, holotype, female, 12.0 mm, AM P.69042, from east of Broken Bay; paratype, male, 10.2 mm, AM P.69044, from north-east of Port Jackson, New South Wales, Australia. Scale bars: gnathopods, pereopods, 0.5 mm; uropods, telson, 0.2 mm.
Distribution.
Australia
.
New South Wales
: east of Broken Bay; off Wollongong.
Tasmania
: east of Fortescue Bay; south-south-east of South East Cape, Main Pedra Hill; east-north-east of Cape Tourville.
Victoria
: south of Point Hicks.