Redescription of Tagulis mystacinus (Araneae: Thomisidae) from Sri Lanka
Author
Benjamin, Suresh P.
Author
Jalee, Ziyard
text
Zootaxa
2007
1560
63
68
journal article
10.5281/zenodo.273906
7e2c1a6b-fac7-4c51-827f-03c77ac450df
1175-5326
273906
Tagulis mystacinus
Simon, 1895
(
Figs 1
A–B, 2A–B, 3A–E)
Tagulis mystacinus
Simon, 1895a
: 973
, fig. 1042.
Simon 1895b
: 432
.
Type
material.
Lectotype
female and two other juveniles,
SRI
LANKA
(
MNHN
17281).
Other material examined.
SRI
LANKA
, 1ɗ 1Ψ, North Western Province, Kurunegala district, Kurunegala, Ethagala Mountains, 0 7° 45′ 0 0″
N 0 80
° 15′ 0 0″ E,
300 m
,
28 February 2007
, Ziyard Jaleel (
MHNG
); 1ɗ subadult, Province of Uva, Monaragala district, Udawalawe national park, 0 6° 27′ 0 0″
N 0 80
° 50′ 0 0″ E,
28 February 1998
, K. Manamendra-arachi, M. M. Bahir and S. Nanayakara (
MHNG
).
Diagnosis.
Tagulis
may be separated from other thomisid spiders by the presence of peculiar leaf-shaped macrosetae immediately posterior to ALE and PLE. However, specialized setae on the carapace are also found in other genera of the tribes Tagulini and Apyretini. A revision of the genus and related genera would be needed before a more precise diagnosis can be provided.
T. mystacinus
may be separated from related species by the details of the male and female genitalia.
Description. Male.
Total length: 2.4; prosoma length: 1.3, width: 1.2. Legs I: femur 0.6, patella 0.4, tibia 0.6, metatarsus 0.5, tarsus 0.4. Markings as in
Figs 2
A, B. Prosoma round, black colored, no markings. Eye in two recurved rows, ALE> PLE> AME> PME, two and one conspicuous leaf-shaped macrosetae immediately posterior to ALE and PLE, respectively. Chelicera, labium and dorsal parts lighter in colour. Opisthosoma oval, tapering towards the back, black/brown colored with two pairs of parallel white lines. Legs I–IV black to shades of brown with white rings at the distal ends of femur, patella and tibia. Leg formula 2143. Femur I–IV with a single dorsal spine at about its center. Palp: tibia short, retrolateral tibial apophysis thin, beak-shaped, with a fine membranous border (
Figs 3
A, B). Cymbium rounded, tip pointed (
Fig. 3
A), bulb disk-shaped, embolus short, rests on the distal border of the tegulum (
Figs 3
A, B).
Female.
Total length: 3.8; prosoma length: 1.6, width: 1.5. Legs I: femur 0.9, patella 0.5, tibia 0.7, metatarsus 0.5, tarsus 0.5. Markings as in
Fig. 2
C. Prosoma dark black/brown, sides darker, with red patches in front around the AME. Opisthosoma round, light brown/reddish, dorsally with very characteristic white markings as in
Figs 1
A and 2C. Legs I–IV dorsally with white markings as in
Fig. 2
C. Eyes as in male. Chelicera, labium and dorsal parts lighter in colour. Leg formula 2143. Leg spination as in male. Epigynum and vulva as in
Figs 3
C–E.
Distribution.
This species is endemic to
Sri Lanka
. Known from two localities, Kurunegala and Udawalawe national park.
Life history and habitat preferences.
All specimens were collected by beating shrubs and flowering plants up to a height of
3m
.
The two adult specimens were collected in the surroundings of Ethagala Mountains. Vegetation of the Ethagala mountain range comprises of small shrubs and trees.
Remarks.
The habitus of
T. mystacinus
resembles some thomisids of the subfamilies “Bominae” and “Thomisinae” (cf.
Ono 1988
). However,
Tagulis
may be separated from them as follows:
Avelis
Simon, 1895
,
Bomis
L. Koch, 1874
,
Holopelus
Simon, 1886
and
Thomisops
Karsch, 1879
posses a rastellum;
Holopelus
and
Thomisops
have gaud shaped receptacles (
Dippenaar-Schoeman 1986a
;
Dippenaar-Schoeman 1986b
;
Dippenaar-Schoeman 1989
; Benjamin unpublished data). Although,
Pseudoporrhopis
Simon, 1886
and
Apyretina
Strand, 1929
posses macrosetae as in
Tagulis
, they differ in shape and relative position on the prosoma (Benjamin unpublished data). This diagnosis is preliminary in nature and would need to be reevaluated once all mentioned genera are revised.