On the Australian Bark Crab Spider Genus Stephanopis: Taxonomic Review and Description of Seven New Species (Araneae: Thomisidae: Stephanopinae)
Author
Machado, Miguel
Laboratório de Aracnologia-Escola de Ciências Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
Author
Teixeira, Renato Augusto
Laboratório de Aracnologia-Escola de Ciências Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
Author
Milledge, Graham A.
Australian Museum Research Institute, Australian Museum, 1 William Street, Sydney NSW 2010, Australia
text
Records of the Australian Museum
2019
2019-09-18
71
6
217
276
journal article
10.3853/j.2201-4349.71.2019.1698
2201-4349
4653814
7EDBAB7F-0E3B-47D7-AA29-0906728ADA05
Stephanopis fissifrons
Rainbow, 1920
Figs 25–26
Stephanopis fissifrons
Rainbow, 1920: 253
, pl. 29, figs 67–68.
Type material examined
.
Syntypes
:
Lord Howe Island
,
New South Wales
,
Australia
,
AMS KS
.6682,
1♂
,
1♀
,
31°33'S
159°05'E
,
A. M. Lea
,
December 1915
to
January 1916
;
SAM
NN262
,
13 juveniles
,
31°30'S
159°4'E
,
December 1915
to
January 1916
;
SAM
NN26
,
1♀
,
31°30'S
159°4'E
,
December 1915
to
January 1916
.
Other material examined
.
Lord Howe Island
,
New South Wales
,
Australia
:
AMS KS
.86884,
1♀
,
31°31'49"S
159°04'38"E
,
T
.
Kingston
&
B. Miller
,
19 September 1978
;
AMS KS
.86886,
1♀
,
8 February 1980
;
AMS KS
.86885,
1♂
,
31°32'05"S
159°04'23"E
,
26 October 1978
;
AMS KS
.76088,
1♂
,
31°32'51"S
159°05'10"E
,
AMS
staff,
26 November–3 December 2000
;
AMS KS
.83210,
1♀
,
31°33'S
159°05'E
, M.
Gray
,
February 1971
;
AMS KS
.90928,
1♂
, H. M.
Smith
,
3 December 2000
;
AMS KS
.84026,
1♀
,
31°33'15"S
159°04' 50"E
, J.
Tarnawski
,
20 February 2001
;
AMS KS
.8403,
2♀♀
,
31°33'19.19"S
159°4'55.63"E
, M.
Gray
,
February 1971
;
AMS KS
.83209,
1♀
,
31°33'48"S
159°05'12"E
;
KS
.108719,
1♂
;
AMS KS
.86883,
1♀
,
31°34'47"S
159°04'34"E
,
T
.
Kingston
,
26 April 1979
;
AMS KS
.108703,
1♂
,
31°34'59.00"S
159°4'51.00"E
,
T
.
Kingston
,
29 March 1979
;
AMS KS
.84023,
1♀
,
Ball’s Pyramid
,
31°45'8.03"S
159°14'58.38"E
,
T
.
Kingston
,
21 January 1980
;
AMS KS
.51686,
1♂
,
Jamberoo Mountain
,
34°39'S
150°46'E
,
J. Noble
,
20 April 1995
.
Diagnosis
. Females of
S. fissifrons
resemble those of
S. lata
in having a trapezoid opisthosoma, prosoma as long as wide and triad of projections on the dorsal surface of their anterior patellae and tibiae (I and II). However, they can be distinguished by their smoother and more flattened habitus (
Fig. 25A
), absence of cephalic prominence (
Fig. 25B
), discrete dorsal leg projections and CO positioned on the posterior border of the epigynal plate (
Fig. 25C
). Male palpi are similar to those of
S. lata
, however they differ by the discrete Pcym and trapezoid RTA instead of an acute one (
Fig. 26C
), rounded tegulum and thick cymbium (
Fig. 26D
). Moreover, males of
S. fissifrons
have long, thin and smooth femora and tibiae (
Fig. 26A
) instead of the armed and robust legs of
S. lata
males.
Figure 25
.
Stephanopis fissifrons
Rainbow, 1920
, female (AMS KS.84037).
(A)
dorsal habitus;
(B)
front;
(C)
epigynal plate, ventral view;
(D)
epigynal plate/spermathecae.
Description
.
Female
(AMS KS.84037): Eyes arranged in a recurved anterior row (
Fig 25A
) and a straight posterior one (
Fig. 25B
). Prosoma and legs predominantly reddish-brown except by the proximal part of the posterior femora, which are yellow (
Fig. 25A
); tibiae I and II ventrally armed with four pairs of macrosetae. Opisthosoma brown with many lighter circular maculae on its dorsum; trapezoid. Epigynum in dorsal view presents a pair of globose anterior chambers, glandular-heads disposed sideways and spermathecae beanshaped (
Fig. 25D
).
Measurements
: eye diameters and interdistances: AME 0.09, ALE 0.20, PME 0.14, PLE 0.14, AME–AME 0.14, AME–ALE 0.18, PME–PME 0.25, PME–PLE 0.15, MOQ length 0.46, width 0.31; leg formula: 1-2-4-3: leg I—femur 3.70/ patella 1.89/ tibia 2.76/ metatarsus 1.84/ tarsus 0.95/ total 11.14; II—3.51/ 1.70/ 2.49/ 1.67/0.95/ 10.32; III—2.26/ 1.10/ 1.80/ 1.19/ 0.55/ 6.90; IV—2.64/ 1.02/ 1.86/ 1.30/ 0.71/ 7.53. Total body length 7.59; prosoma length 3.93, width 3.58; opisthosoma length 3.66; clypeus height 0.25; sternum length 1.78, width 1.41; gnathocoxae length 0.98, width 0.47; labium length 0.55, width 0.63.
Male
(AMS KS.86882): Eye arrangement as in female (
Fig. 26B
). Prosoma covered by hyaline setae, entirely brown with darker marks on the sides of the cephalic portion (
Fig. 26A
). Anterior legs (I and II) entirely brown and posterior ones (III and III) yellow only on the proximal half of the femora (
Fig. 26A
). Embolus short, curved on itself (
Fig. 26C
).
Figure 26
.
Stephanopis fissifrons
Rainbow, 1920
, male (AMS KS.86882).
(A)
dorsal habitus;
(B)
front;
(C)
ventral view of the left palp;
(D)
left palp, retro lateral view.
Measurements
: eye diameters and interdistances: AME 0.10, ALE 0.15, PME 0.13, PLE 0.13, AME–AME 0.10, AME–ALE 0.08, PME–PME 0.16, PME–PLE 0.11, MOQ length 0.37, width 0.29; leg formula: 1-2-4-3: leg I—femur 2.33/ patella 1.12/ tibia 1.70/ metatarsus 1.14/ tarsus 0.68/ total 6.97; II—2.06/ 1.06/ 1.51/ 1.01/0.61/ 6.25; III—1.20/ 0.62/ 0.88/ 0.56/ 0.47/ 3.73; IV—1.43/ 0.58/ 0.91/ 0.66/ 0.44/ 4.02. Total body length 4.57; prosoma length 2.22, width 2.10; opisthosoma length 2.35; clypeus height 0.21; sternum length 0.92, width 0.87; gnathocoxae length 0.49, width 0.28; labium length 0.26, width 0.39.
Distribution
. Lord Howe Island,
New South Wales
,
Australia
(
Fig. 35
).