Bolostromus panamanus (Petrunkevitch, 1925)

Dupérré, Nadine, 2023, Review of the American genus Bolostromus Ausserer, 1875 with the description of fourteen new species (Araneae, Cyrtaucheniidae), Zootaxa 5317 (1), pp. 1-88 : 9-10

Bolostromus panamanus (Petrunkevitch, 1925)

Figs 4–8 , map 1

Ancylotrypa panamana Petrunkevitch, 1925a: 93 (Description female).

Bolostromus panamanus Raven, 1985 a: 130 (Transfered female from Ancylotrypa ).

Bolostromus panamanus Calatayud-Mascarell, Alonso-Alonso & Korba, 2021: 1017 , f. 1A, C, 2A–H, 3A–C (redescription female from Costa Rica).

Type material. Female holotype from Wilcox camp on San Lorenzo river ( Peabody Museum of Natural History at Yale University) Examined by photo .

Additional material. PANAMA: Panama Oeste Province: Canal Zone , Barro Colorado Is., 1♁ 2♀, April–May 1942 (Zetek) Berlese ( MCZ92465 ) ; Barro Colorado Is., 3 juv., 6.ii.1976, berlese litter, around rotting log, A. Newton ( MCZ 71162 ) ; Barro Colorado Is. 2♀, 8.ii.1976, Berlese litter, under old tree, and vine fall, A. Newton ( MCZ) .

Diagnosis. Females most resemble B. holguinensis , but are distinguished from the latter and all other species by the following combination of characters: internal genitalia with short bifid spermathecae, with rounded lobes ( Fig. 5E ); legs without a black pattern of coloration ( Fig. 5D ); while female of the latter has their internal genitalia with short rounded spermathecae, without lobes (see Rudolph 1996: fig. 5) and legs with black pattern of coloration ( Fig. 10D ). Males most resembles B. laheredia n. sp. but are distinguished by the combination of the following characters: tibiae I with two ventral spines ( Fig. 7D ); eyes not on prominent mound ( Fig. 7C ) and palpal bulb thin, embolus tip slightly sinuous ( Fig. 8C–E ), whereas B. panamanus tibiae I with 4–5 ventral spines ( Fig. 2D ); eyes on a prominent mound ( Fig. 2C ); palpal bulb globose and embolus tip curved apically ( Fig. 3C–E ).

Description. Female (MCZ 92465): Total length: 4.57; carapace length: 1.83; carapace width: 1.43; carapace height: 1.03; abdomen length: 2.74. CEPHALOTHORAX: Carapace almost rectangular slightly wider medially, margin sinuous; pars cephalica dark orange-brown; pars thoracica light orange-brown, reticulate; cephalic groove not well defined, without pit medially; fovea broad, procurved ( Fig. 5A ); caput elevated ( Fig. 5C ). Clypeus height: 0.09. Sternum 1.19/0.87, orange, smooth; posterior sigillae oval, other sigillae inconspicuous ( Fig. 5B ). Labium yellow without cuspule. Endites quadrangle; yellow with four cuspules; serrula not observed. Chelicerae dark reddish-orange; promargin five teeth and seven denticles; rastrellum with 10 spines. EYES: AME: 0.08; ALE: 0.1; PLE: 0.07; PME: 0.04; interdistances: AME: 0.01; AME-ALE: 0.02; PME: 0.2; PME-PLE: touching; LE: touching; ocular quadrangle: 0.41/ 0.44/0.14. ABDOMEN: Oval, dark gray dorsally and light gray ventrally ( Fig. 4A, B ). Spinnerets: median spinnerets: 0.21; lateral spinnerets: 0.34/0.29/0.37. LEGS: Leg I tibia and tarsi orange, femur and patellae and metatarsi yellow; leg II orange-brown, patellae to tarsi light orange; leg III–IV without pattern, uniformly yellow. Coxae I–II without inner short stiff setae. Metatarsi I with thin apical scopulae ( Fig. 5D ); metatarsi II without scopulae; tarsi I–II with thin scopulae ( Fig. 5D ); tarsi III–IV without scopulae. Tarsal claw teeth (19/23) (18/22) (2/2) (3/2). LEGS MEASUREMENTS: I 4.31 (1.40/0.65/1.01/0.73/0.52); II 3.69 (1.10/0.56/0.79/0.68/0.56); III 2.72 (0.91/0.47/0.47/0.46/0.41); IV 15.73 (1.37/0.77/1.15/0.78/0.50); leg formula: 4123. LEGS SPINATION: femur I–III (0); IV with 9 grouped pro-apical spines; patellae I 1v, II, IV (0); III 9p, 1r; tibia I 1-1v; II 1-1v; III 1d, 1r, 1p, 2vap; IV 1v, 2vap; metatarsus I 1v, 1vap; II 1-1v, 3vap; III 1-1-1-1d, 2r, 2vap; IV 2r, 1-1v, 3vap; tarsus I, II, IV (0); III 1-1v. GENITALIA: Spermathecae short and bifid, with small rounded lobes ( Fig. 5E ).

Male (MCZ 92465): Total length: 4.04; carapace length: 1.94; carapace width: 1.53; carapace height: 0.89; abdomen length: 2.10. CEPHALOTHORAX: Carapace almost rectangular slightly wider medially, margin sinuous; pars cephalica dark orange-brown; pars thoracica orange-brown, reticulate; cephalic groove not well defined, without pit medially; fovea broad, procurved ( Fig. 7A ); caput elevated ( Fig. 7C ). Clypeus height: 0.09. Sternum 1.21/0.91, dark orange-brown anteriorly, light orange posteriorly, smooth; posterior sigillae oval, other sigillae inconspicuous ( Fig. 7B ). Labium dark orange-brown without cuspule. Endites quadrangle; orange-brown with four cuspules; serrula not observed. Chelicerae dark reddish-orange; promargin five teeth and six denticles; rastrellum with nine spines. EYES:AME: 0.07; ALE: 0.13; PLE: 0.13; PME: 0.03; interdistances: AME: 0.06; AME-ALE: 0.02; PME: 0.26; PME-PLE: touching; LE: touching; ocular quadrangle: 0.41/0.42/0.19. ABDOMEN: Oval, dark gray dorsally and light gray ventrally ( Fig. 6A, B ). Spinnerets: median: 0.21; lateral: 0.29/0.30/0.34. LEGS: Leg I–II femur to tibiae and apex of tarsi orange-brown, metatarsi yellow; leg III–IV femur orange-brown, patellae and tibiae lighter orange-brown, metatarsi half orange-brown and half yellow, tarsi yellow. Coxae I–II without inner short stiff setae. Metatarsi I–II curved, wider apically, with half apical scopulae ( Fig. 7D ); tarsi I–II with scopulae ( Fig. 7D ); III–IV without scopulae. Tarsal claw teeth (3/10) (3/9) (3/5) (4/5). LEGS MEASUREMENTS: I 5.94 (1.73/0.80/1.44/1.15/0.82); II 5.07 (1.48/0.71/1.21/0.92/0.75); III 3.61 (1.06/0.49/0.57/0.77/0.72); IV 5.48 (1.62/0. 63/1.39/1.14/0.70); leg formula: 1423. LEGS SPINATION: femur I–III 1d; IV 1d and 7 grouped pro-apical spines; patellae I, II, IV (0); III 5r, 1p; tibia I–II 1-1v; III 1d, 1r, 1p, 2vap; IV 1v, 2vap; metatarsus I–II (0); III 1-1-1-2d, 2r, 3vap; IV 1v, 3vap; tarsus I, II, IV (0); III 1v. GENITALIA: Palp: 0.97/0.40/0.85/0.40, bulb 0.43/0.21. Femur longer than tibiae, darker than other palpal segments; cymbium with four apical spines ( Fig. 8A, B ); bulb narrow; embolus tip sinuous ( Fig. 8C–E ).

Distribution. Veraguas and Panama Oeste Province in Panama.

Note. Calatayud-Mascarell et al. (2021) redescribed B. panamanus based on a female from Costa Rica, about 170km away. They present illustrations of three females identified as B. panamanus ( Calatayud-Mascarell et al. 2021; fig. 3). One female from Coclé, Panama redrawn from Indicatti 2007, one female from Costa Rica, Limon Province, and the type specimen of the species from Chiriquí, Panama (examined by photo). They also mentioned that B. panamanus could constitute a complex of species rather than a single one. The female and male presented here were collected in Barro Colorado Island, and the female genitalia specifically matches with the female holotype genitalia (see Calatayud-Mascarell et al. 2021; fig. 3c). B. panamanus internal genitalia consist of a short spermathecae with rounded lobes, while the other two present rather elongated spermathecae with elongated inner lobes (see Calatayud-Mascarell et al. 2021; fig. 3a, b). Consequently, there is a possibility that the specimen presented by Calatayud-Mascarell et al. (2021) represents a new and different species. To be noted that the type locality is situated in the Veraguas province, and not in the Chiriquí province ( Griscom 1924).

Figures

MAP 1. Distribution map of Bolostromus in Central America and Northern South America. Bolostromus laheredia n. sp. (turquoise circle), B. panamanus (Petrunkevitch, 1925) (blue star), B. holguinensis Rudloff, 1996 (green star), B. busu n. sp. (red circle), B. insularis (Simon, 1892) (pink star), B. pulchripes (Simon, 1889) (red star), B. fauna (Simon, 1889) (black star), Bolostromus venustus Ausserer, 1875 (orange star).

FIGURE 2. Bolostromus laheredia n. sp. male holotype. A. Carapace, dorsal view. B. Sternum ventral view. C. Carapace, lateral view. D. Leg I, retrolateral view (arrows point to scopulae). Scale bar: 0.5mm.

FIGURE 3. Bolostromus laheredia n. sp. male holotype. A. Palp, prolateral view. B. Palp, retrolateral view. C. Bulb, prolateral view. D. Bulb, apical view. E. Bulb, retrolateral view. Scale bars: A, B: 0.5mm; C–E: 0.1mm.

FIGURE 4. Bolostromus panamanus (Petrunkevitch, 1925). Female (MCZ 92465). A. Habitus, dorsal view. B. Habitus ventral view. Scale bar: 0.5mm.

FIGURE 5. Bolostromus panamanus (Petrunkevitch, 1925). Female (MCZ 92465). A. Carapace, dorsal view. B. Sternum, ventral view. C. Carapace, lateral view. D. Leg I, retrolateral view. E. Internal genitalia, ventral view. Scale bar: 0.5mm.

FIGURE 6. Bolostromus panamanus (Petrunkevitch, 1925). Male (MCZ 92465). A. Habitus, dorsal view. B. Habitus ventral view. Scale bar: 0.5mm.

FIGURE 7. Bolostromus panamanus (Petrunkevitch, 1925). Male (MCZ 92465). A. Carapace, dorsal view. B. Sternum, ventral view. C. Carapace, lateral view. D. Leg I, retrolateral view. Scale bar: 0.5mm.

FIGURE 8. Bolostromus panamanus (Petrunkevitch, 1925). Male (MCZ 92465). A. Palp, prolateral view. B. Palp, retrolateral view. C. Bulb, prolateral view. D. Bulb, apical view. E. Bulb, retrolateral view. Scale bars: A, B: 0.5mm; C–E: 0.1mm.

FIGURE 10. Bolostromus holguinensis Rudloff, 1996. Female (paratype from Berlin). A. Carapace, dorsal view. B. Sternum, ventral view. C. Carapace, lateral view. D. Leg I, retrolateral view. Scale bars: A, B: 1.0mm; C, D: 0.5mm.