The Spider Subfamily Amaurobioidinae (Araneae, Anyphaenidae): A Phylogenetic Revision At The Generic Level
Author
RAMÍREZ, MARTÍN J.
text
Bulletin of the American Museum of Natural History
2003
2003-08-13
2003
277
1
262
http://www.bioone.org/doi/abs/10.1206/0003-0090%282003%29277%3C0001%3ATSSAAA%3E2.0.CO%3B2
journal article
10.1206/0003-0090(2003)277<0001:TSSAAA>2.0.CO;2
0003-0090
12776077
Tasata taim
,
new species
Figure 130
TYPES
: Male
holotype
and penultimate female
paratype
from
Brazil
, State of
Rio Grande do Sul
, Santa Vitória do Palmar, Estação Ecológica do Taim, ca. 33 °31̍S, 53°21̍W,
12.IX.1991
, A. Lise, in MCTP 0992. The female was close to ecdysis, and the genitalia could be dissected.
ETYMOLOGY
: The specific name is a noun in apposition taken from the
type
locality.
DIAGNOSIS
: Distinguished from other
Tasata
by having a greenish, extremely elongate abdomen, and a flattened carapace with white hairs at the sides.
FEMALE
(penultimate,
paratype
): Abdomen extremely elongate, legs very long, including leg III. Total length 7.58. Carapace length 2.50, width 1.87, wider on legs II–III. Length of tibia/metatarsus: I, 2.87/2.50; II, 2.80/ 2.43; III, 1.90/1.83; IV, 2.63/2.93. Palpal tarsus length 1.00. Chelicerae with four teeth on promargin, three on retromargin, apical one smaller. Sternum length 1.27, width 1.07. Spines (long on anterior legs): leg
I,
femur d 1–1–1, p 0 d1 1 0 d1, r 0 d1 d1; tibia v 2 p1 2 0 2 (xp1 xxx abnormal, absent in other female and male), p d1 d1 1 0 or d1– 1, r d1–1; metatarsus v 2bas, p and r d1–1– 0, d 0 p1 0 2.
II,
femur d 1–1–1, p and r 0 d1 d1; tibia v 2–2–2, p and r d1–1; metatarsus = I.
III,
femur = II; patella r d1; tibia v 2–2–2, p and r 1–1, d r1 0 1 0; metatarsus v 2–2–2, p and r d1–1–1, d 0 p1–2.
IV
= III. Abdomen length 5.45, width 2.00, spiracle– epigastrium 2.40, spiracle–spinnerets 1.57. Color as in male. Epigyne (not sclerotized, disected from immature, similar to that of mature female, fig. 130F, G): lateral lobes separate, anterior pouch ample. Copulatory openings close to epigastric furrow, copulatory ducts thin (most probably because of being unsclerotized), ducts of accessory bulbs long (but short in adult female). Spermathecae unmodified, spherical (collapsed in clove oil).
MALE
(
holotype
): Total length 8.25. Carapace length 2.90, width 2.10. Length of tibia/metatarsus: I, 4.99/4.66; II, 4.52/4.12; III, 3.07/2.93; IV, 4.12/4.39. Left chelicera with two teeth on retromargin, apical one missing, right normal. Sternum length 1.50, width 1.23. Spines as in female, except: leg
I,
tibia v 2–2–2, p 1–1.
III,
metatarsus v 2 r1–2. Abdomen length 5.60, width 1.73, spiracle–epigastrium 2.23, spiracle–spinnerets 1.83. Col or (fig. 130A): carapace pale grayish with three longitudinal dark bands, one median, two laterals. Many white hairs covering clypeus, margins of carapace, its pale stripes, pale areas of sternum, coxae. Legs grayish with small dark dots, contrasting on femora. Sternum, labium, endites yellow, each with longitudinal stripe of irregular dark spots, darker on anterior, posterior ends of sternum. Dorsum of abdomen with white guanine reticulum (except on cardiac area and posterior end), wide grayish band, from posterior half of cardiac area to anal tubercle; sides grayish. Venter with white guanine reticulum, two longitudinal stripes from epigastrium to spinnerets, touching corners of tracheal spiracle. Epigastrium with two longitudinal spots, at internal margins of pulmonary plates. Palp (fig. 130B–E): tibia long, width/length 0.47. Sperm duct with loop approximating anterior ventral margin of tegulum, slight spiral before reaching the embolus. Embolus very thin, without basal process, membranous area ample, concave, projecting dorsally. Paramedian apophysis sinuous, with acute tip. Primary conductor concave, rounded, apex in contact with lobe on prolateral portion of secondary conductor. Prolateral portion of secondary conductor with denticles at apical margin; retrolateral portion with tiny denticles.
VARIABILITY
: Female MCTP 6852 has an additional, smaller distal tooth on the cheliceral promargin. The differences in the spermathecae are presumably because of incomplete development of the
paratype
.
NATURAL
HISTORY
: Unknown.
DISTRIBUTION
: Known only from
type
locality.
OTHER
MATERIAL
EXAMINED
:
BRASIL
:
Rio Grande do Sul
:
Porto Alegre,
22.I.1995
, W. Guevell,
1♀
(MCTP 6852).