Revision and molecular phylogeny of the spider genus Micaria Westring, 1851 (Araneae: Gnaphosidae) in the Afrotropical Region
Author
Booysen, Ruan
0000-0002-0841-9143
booysenr@ufs.ac.za
Author
Haddad, Charles R.
0000-0002-2317-7760
haddadcr@ufs.ac.za
text
Zootaxa
2021
2021-03-04
4940
1
1
82
journal article
7420
10.11646/zootaxa.4940.1.1
a09df80c-5d8b-44da-8f25-723f107c6c49
1175-5326
4580917
5F073867-F6EA-4222-A190-77F68076BE9C
Micariatersissima
Simon, 1910
Figs 36
,
167
–
168
,
170
Micariatersissima
Simon, 1910: 203
(♂)
Type material.
Holotype
♂,
SOUTHAFRICA
:
Northern Cape
:
Komaggas, leg.
L. Schultze
,
VII.1904
(ZMB 28241—examined).
Other material examined:
SOUTH AFRICA
:
Northern Cape
:
Komaggas
, under rocks, hand collecting,
29°40.000’S
,
17°35.415’E
, leg.
R. Booysen
,
L. Whitehead, R. Christiaan
&
Z. Mbo
,
25.IV.2019
,
1 ♂
(NCA 2019/412)
.
Diagnosis.
Micaria tersissima
can be distinguished from other Afrotropical
Micaria
in having dark brown legs and carapace and a black abdomen with two white spots medially. The anterior margin of the abdomen is truncated and legs III and IV have a white longitudinal median stripe. The sperm duct in the males has a characteristic kink in the retrolateral basal section of the duct and three elongate spines anterior to the embolus. Females are still unknown.
Description. Male (non–type specimen from Komaggas, NCA 2019/412): Measurements:
TL 3.10, CL 1.45, CW 0.95, CL:CW 1.53, CLH 0.10, CLH:AME 2.38. Eyes: ALE 0.05, AME 0.04, PLE 0.04, PME 0.04, AME–AME 0.04, PME–PME 0.07, MOQAW 0.14, MOQPW 0.16, MOQL 0.21. SL 0.76, SW 0.56, AL1.55, AW 0.90.
Leg
measurements:
Palpal segment lengths: 0.48, 0.24, 0.25, 0.40.
Leg
I: 1.05, 0.46, 0.89, 0.78, 0.70. II: 0.92, 0.41, 0.73, 0.64, 0.70. III: 0.83, 0.33, 0.68, 0.71, 0.54. IV: 1.29, 0.44, 0.98, 1.19, 0.65. TLoflegs (I–IV): 3.88, 3.40, 3.09, 4.55; leg formula: 4123.
Colouration:
carapace and abdomen dark brown or black; legs Iand II with only femora darkened; legs III and IV with femora up to metatarsi darkened, with dorsal white longitudinal median stripes, tarsi light in colour; sternum, labium, endites and chelicerae similar in colour to carapace (
Fig. 36
).
Carapace:
smooth in texture; decorated with squamose setae; broad, somewhat rectangular dark pattern present medially, with radiating dark lines; posterior margin wide and straight; fovea absent; anterior margin narrowing slightly from coxa I; PER procurved in dorsal view, AER recurved in anterior view.
Chelicerae:
decorated with plumose setae.
Labium:
triangular in shape, rounded at tip, cluster of setae present apically.
Endites:
oblique; anterior margin rounded; cluster of setae present on inner–apical margin; black anterior margin.
Sternum:
shield-like; broadest between coxa Iand II; posterior margin tapered behind coxa IV; decorated with aculeate setae.
Legs:
femora laterally flattened, highest at base, leg Imore pronounced in this fashion; rest of legs normal, thin.
Leg
macrosetae: Palps: 1do, 1do, 1pl, 1pl, 2plv, 2vt.
Leg
I: 1do, 1pl. II: 1do, 1pl. III: 1do, 1pl, 1rl, 1pl, 1plv, 2vt, 1plv, 1rlv, 4vt. IV: 1do, 2plv, 2vt, 1pl, 2plv, 1rlv, 4vt. Scopulate setae on tarsi of legs I–IV.
Abdomen:
cylindrical in shape; decorated with squamose setae; truncated anteriorly; two small spots visible on midline dorsally, small white spot present just above spinnerets; venter similar in colour to dorsum; sigilla not visible.
Palp:
retrolateral tibial apophysis absent; median apophysis present, curved prolaterally, thin; sperm duct present on retrolateral surface of tegulum, kink in retrolateral basal portion of sperm duct; embolus tip thin, slanted retrolaterally; cymbium pear-shaped; two small spines present on tip of cymbium; three long ventral terminal spines present in front of embolus (
Figs 167, 168
).
Distribution.
Micaria tersissima
is only known from its
type
locality (
Map 5
).