Sophrosynidae, a new family in the Lysianassoidea (Crustacea: Amphipoda) with a revision of the genus Sophrosyne
Author
Lowry, J. K.
Author
Stoddart, H. E.
text
Zootaxa
2010
2010-02-25
2370
1
1
35
https://biotaxa.org/Zootaxa/article/view/zootaxa.2370.1.1
journal article
10.11646/zootaxa.2370.1.1
1175-5326
5306939
Sophrosyne inverarae
sp. nov.
(
Figs10–12
)
Sophrosyne robertsoni
.
—
Norman, 1900: 196
(in part). —
Moore, 1984: 37
(in part, part =
S. moorei
). —
Lincoln, 1979: 52
, fig. 17. —
Kilgallen
et al.
, 2007: 1243
, fig. 1.
Type material
.
HOLOTYPE
, female, ovigerous (at least
5 eggs
),
6.5 mm
, BMNH 1911:11:8:12449-12551,
Inveraray
,
Loch Fyne
,
Scotland
(approx.
56°13'N
5°4'W
), 1874
.
PARATYPE
, female, same locality [material recorded by
Norman (1900)
as
S. robertsoni
].
Type
locality.
Inveraray
,
Loch Fyne
,
Scotland
(approx.
56°13'N
5°4'W
)
.
Etymology
. The specific name is a reference to the
type
locality.
Diagnostic description
.
Head
lateral cephalic lobe small, narrowly rounded; eyes apparently absent.
Antenna 1
peduncular article 1 short, length 1.3 x breadth; accessory flagellum medium length, 0.5 x primary flagellum, article 1 short, 1.2 x article 2; flagellum 7-articulate, without callynophore.
Antenna 2
peduncular article 3 0.5 x article 4; flagellum 7-articulate.
Mandible
incisors with slightly convex margins;
palp article 2 slender
, 1 x article 3, with 1 submarginal posterodistal A2-seta,
D2-setae present
,
article 3
length 5.6 x breadth,
with 1 distal D3-seta
and 3 apical E3-setae.
Maxilla 1
outer plate with setal-teeth in a 2/5
FIGURE 9.
Sophrosyne integricauda
sp. nov.
, holotype female, 3.2 mm, MV
J60739
, Cape Wickham, King Island, Bass Strait, Australia. Scales for U1–3 and T represent 0.01 mm, remainder represent 0.2 mm.
arrangement
.
Maxilla 2
inner plate narrow, outer plate broader; inner plate length 0.6 x outer plate.
Maxilliped
inner plate subrectangular, without apical nodular robust setae; outer plate submarginal setae short, simple; palp article 2 slender, length 2.2 x breadth, 1.1 x article 3, article 3 slender, length 2.4 x breadth, dactylus with unguis absent.
Gnathopod 1
basis
length 1.5 x breadth,
anterior margin with slender setae
; ischium length 1.2 x breadth; merus, posterior margin lined with long slender setae; carpus length 0.5 x propodus; propodus length 1.7 x breadth, posterior margin slightly concave, with robust setae,
palm margin sinusoidal
,
posterodistal corner with produced subacute spine bearing vestigial seta
.
Gnathopod 2
minutely subchelate; ischium length 3.1 x breadth; carpus long, length 3.3 x breadth, posterior margin straight; propodus subrectangular, long, length 2.1 x breadth;
palm
transverse,
with straight margin
, with minute robust setae.
Pereopod 3
merus weakly expanded anteriorly.
Pereopod 4
merus weakly expanded anteriorly.
Pereopod 5
basis moderately expanded posteriorly; merus moderately expanded posteriorly.
Pereopod 6
coxa small, strongly lobate posteriorly
; merus slightly expanded posteriorly.
Pereopod 7
basis posterior margin slightly rounded, minutely crenate, posteroventral margin rounded, posteroventral lobe not extending beyond ischium; merus not expanded posteriorly; propodus without setae along anterior margin.
Epimeron 3
posterior margin with strong upturned spine above subquadrate posteroventral corner
.
Urosomite 1
with anterodorsal notch and rounded boss, without lateral flange.
Uropod 1
rami subequal in length; outer ramus with 3 dorsal robust setae; inner ramus with 1 dorsal robust seta.
Uropod 2
rami subequal in length; outer ramus with robust setae.
Uropod 3
peduncle length 1.4 x breadth; rami subequal in length.
Telson
longer than broad, length 1.1 x breadth, moderately cleft (48%), distal margins incised, with 1 apical slender setae on each lobe.
Remarks.
Sophrosyne inverarae
shares with
S. murrayi
and
S. rodondo
the same setal-tooth arrangement on the outer plate of maxilla 1, a vestigial seta on the posterodistal corner of the gnathopod 2 propodus, the shape of the basis of pereopods 5 and 6, a curved posteroventral corner with strong upturned tooth on epimeron 3 and a moderately cleft telson.
Sophrosyne inverarae
differs from both species in having D2- and D3-setae on the mandibular palp. It differs from
S. murrayi
most noticeably in having a minutely subchelate second gnathopod.
Distribution.
Loch Fyne, Inveraray,
Scotland
.