Actinopus simoi,

Duniesky, Rios-Tamayo, 2019, Four new species of Actinopus (Mygalomorphae: Actinopodidae) from Uruguay, Zootaxa 4624 (4), pp. 523-538: 530-533

publication ID

https://doi.org/10.11646/zootaxa.4624.4.5

publication LSID

lsid:zoobank.org:pub:6106ED74-7097-4D00-943B-1E7ACB2C3832

persistent identifier

http://treatment.plazi.org/id/03DE87F0-FFBC-191D-FF6F-9AD4FEB41722

treatment provided by

Plazi

scientific name

Actinopus simoi
status

sp. nov.

Actinopus simoi  sp. nov.

( Figs 6View FIGURE 6, 7View FIGURE 7, 10View FIGURE 10)

urn:lsid:zoobank.org:act:9ECF08C7-59B6-4B09-8769-B9CAFA1F0042

Type material: Uruguay: Maldonado. Holotype ♂: Cerro San Antonio [34°52′S 55°16′W], 15 February 1980, M. Estoll ( MNHN 1310View Materials)GoogleMaps  . Paratype ♀: San Carlos [34°48′S 54°55′W], 9 January 1978, R. Capocasale ( MNHN 1281View Materials)GoogleMaps  .

Other material examined. Uruguay: Maldonado: Sierra de Animas [34°45′S 55°19′W], E. García & J. Ro- dríguez, 10 January 1971, 1♀ ( MNHN 632View Materials)GoogleMaps  ; Canelones: Balneario Solis [34°47′S 55°23′W], A. Leep, 1 December 1974, 1♂ ( MNHN 666View Materials)GoogleMaps  .

Etymology. The specific name is a patronym in honor of Dr. Miguel Simó Núñez, for his contributions to the knowledge of Uruguayan spiders.

Diagnosis. Males of A. simoi  differ from those of all other species by the dark body colour; they resemble those of A. liodon  but differ in leg coloration, with red metatarsi-tarsi and palp tibiae ( Fig. 6EView FIGURE 6); they can by recognized by a chelicerae prolongation without cuspules (like A. liodon  and A. longipalpis  ). Males also differ from those of A. longipalpis  by their copulatory bulb shape ( Fig. 6View FIGURE 6 F–H). Females can be distinguished from those of other species by the shape of their spermathecae ( Fig. 7F, GView FIGURE 7) with a small external lobe, similar to that of A. insignis  but differ by their booklung with dark markings and a longer sternum.

Description. ( Fig. 6View FIGURE 6). Male holotype (MNHN 1310). Total length: 12.20. Carapace ( Fig. 6AView FIGURE 6): length 5.80, width 5.50; cephalic region: length 3.40, width 4.20; clypeus small, 11 bristles between PME, 4 behind each PME- PLE, 4 bristles and one larger on both sides of ocular group. Fovea: length 1.00, width 2.50. Eyes, diameters and interdistances: AME 0.26 (large), ALE 0.32, PME 0.16, PLE 0.32, ocular group length 0.90, anterior width 2.60, 2.38 posterior width; AME-ALE 0.69, PME-PLE 0.16, AME-PME 0.37, ALE-PLE 0.42, AME-AME 0.21. Chelicerae: length 2.60, width 1.30; cheliceral apex with 12 recumbent and elongated bristles which cover fang base. Cheliceral prolongation without cuspules. Cheliceral furrow ( Fig. 6CView FIGURE 6) with 6 large promarginal and 5 retromarginal teeth (small one between 3th–4th and 4th–5th) and 10 denticles, near promarginal teeth. Labium: length 0.90, width 1.10. Maxillae: anterior length 1.50, posterior length 2.20, width 1.40. Sternum: Center flat ( Fig. 6BView FIGURE 6): length 4.00, maximum width 3.20, minimum width 1.10. Postlabial sigilla shallow, posterior sigilla well defined. Abdomen (very compressed due to poor preservation): length ~ 5.40, large, covered by bristles. Spinnerets compressed. Lengths of legs and palp: I: 5.50, 2.20, 3.10, 3.80, 2.20, 16.80. II: 5.50, 2.20, 3.10, 3.80, 2.00, 16.60. III: 4.20, 2.20, 2.50, 4.50, 2.00, 15.40. IV: 5.50, 2.50, 4.50, 4.50, 2.50, 19.50. Palp: 5.50, 2.60, 4.20,–, 1.40, 13.70. Chaetotaxy: Femora: I–IV, 0. Patellae: I–II: 0; III, 35 P SUP-D ANT + 10 on margin, 1-1-1-1 D (2:3 B), 7 R A + 11 on margin; IV, 54 P SUP- D ANT. Tibia: I, 1-1- 3 V (1:2 A); II, 1-2-2-3-4-2-3 R, 1-2-1- 3 V; III, 1 P, 1 D (1:2 B), 1-1 R (1:3 A), 1- 4 V A, with apical crown of 19 thorns; IV, 1-1-2 P, 1-1-2- 3 V. Metatarsi: I, 1-0-1- 1 V ANT, 2-2-1-1- 2 V POST; II, 1-1- 2 V ANT, 2-1-2-1-2-2-1- 4 V POST; III, 1-3-1-2-1-1-3 P, 1 D A, 2-2-2-1-1-3-3-4 D POST-R SUP, 2-3-3-1-1-1-2- 2 V; IV, 1-2-2- 2-2-1-3 P, 2-1-1-1- 4 V. Tarsi: I, 1-1-1-1 P INF, 16 R INF; II, 2-1-1-1-2-2-1 P INF, 19 R INF; III, 12 P INF, 18 R INF; IV, 20 P INF, 13 R A. Total number of retrolateral spines on tibiae I, II ( Fig. 6DView FIGURE 6): 0 and 17, respectively. Palp: tibiae short, thickened ( Fig. 6EView FIGURE 6). Bulb ( Fig. 6View FIGURE 6 F–H) with ATA and BTA developed, embolus with series of denticles at base. Scopulae: Tarsi: I–II, sparse 1:2 apical; III–IV, dense, uniform. Metatarsi: IV sparse 1:4 A. Trichobothria: Tibiae: I–II 4-3; III 5-4; IV 6-5. Metatarsi: I–II 10; III 8; IV 7. Tarsi: I 9; II 7; III 9; IV 7. Color: carapace and chelicerae black. Abdomen dark brown; booklungs with dark markings. Sternum, labium and maxillae dark reddish brown. Legs like carapace with lighter tarsi-metatarsi; palp with lighter tibiae.

Female paratype (MNHN 1281). Total length: 16.20. Carapace ( Fig. 7AView FIGURE 7): length 6.40, width 6.30; with 12 bristles on each posterior margin; cephalic region: length 3.70, width 5.30; clypeus small with 18 bristles, 9 on chillum; 12 bristles between PME and 4 behind each PME-PLE, 6 bristles and one larger on both sides of ocular group. Fovea: length 1.20, width 3.00. Eyes, diameters and interdistances: AME 0.21, ALE 0.42, PME 0.21, PLE 0.26, ocular group 1.06, anterior width 3.55, 3.34 posterior width; AME-ALE 1.06, PME-PLE 0.21, AME-PME 0.72, ALE-PLE 0.58, AME-AME 0.32. Chelicerae: Length 2.80, width 2.10, chelicerae apex with 12 recumbent and elongated bristles covering fang base. Rastellum with 11 marginal, blunt spines and 7 small dorsal. Cheliceral furrow ( Fig. 7CView FIGURE 7) with 5 promarginal and 4 retromarginal teeth, and 10 denticles in furrow, near promargin. Labium: length 1.10, width 1.30, with 10 anterior cuspules. Maxillae: anterior length 2.10, posterior length 2.50, width 1.40, with 60 cuspules 1: 3 V ANT, expanding to anterior face. Sternum: Center flat (Fig, 7B), length: 5.30, maximum wide 4.20, minimum width 1.30. Postlabial sigilla deep, posterior sigilla shallow, well defined. Abdomen: length 11.00, covered by dark bristles. PMS: length 0.79; PLS with basal: medial: apical articles 0.79:0.42:0.26. Spigots: 2 large, 25 small on PMS; PLS, numbers of large (small) spigots on basal: medial: apical article 3(35):2(+20):0(~50). Lengths of legs and palp: I: 3.40, 2.40, 1.60, 2.20, 1.10, 10.70. II: 3.40, 2.50, 1.60, 2.30, 1.10, 10.90. III: 3.00, 2.70, 1.20, 2.50, 1.00, 10.40. IV: 4.00, 2.80, 2.50, 2.70, 0.80, 12.80. Palp: 3.20, 2.20, 2.20,–, 2.50, 10.10. Chaetotaxy: All femora: 0. Patellae: I–II, 0; III, 20 P A + 13 on the margin, 25 R A + 14 on the margin; IV, 71 P SUP-D ANT; palp, 1-1- 1 p. Tibiae: I, 5-11 R, 1/1- 1 V POST; II, 85 R; III, 1 D B, with apical crown of 19 thorns and 6 apical (at apex, anterior to crown), 50 R; IV, 0; palp, 1-1-1 P INF, 1-1-1 p, 17 R INF. Metatarsi: I, 18 P INF, 1-1- 1 V POST, 24 R INF; II, 7 P INF, 12 R INF, 1-1- 2 V POST; III, 28 D ANT-P SUP, 50 on row D POST-R (more abundant R A); IV, 12 P INF, 1 D A. Tarsi: I, 9 P INF, 13 R INF, 1 V A; II, 12 P INF, 9 R INF, 1 V A; III, 22 R, 87 V-P; IV, 82 V-P; palp, 17 P INF, 28 R INF, 2 V A. Total number of retrolateral spines on tibiae I, II ( Fig. 7DView FIGURE 7): 16 and 85, respectively. Trichobothria: Tibiae: I 4-5; II–III 6-4; IV 7-6. Metatarsi: I 11; II 10; III 9; IV 5. Tarsi: I 7; II 9; III 11; IV 5. Color: carapace, cephalic region, legs and chelicerae dark reddish brown. Abdomen brown; booklungs with dark markings ( Fig. 7DView FIGURE 7). Sternum light reddish brown, darker labium and maxillae. Spinnerets dark.

Distribution. Currently known only from Maldonado province, but may be more widespread in southern Uruguay ( Fig.10View FIGURE 10).