Pomboa quimbaya, Valdez-Mondragón, Alejandro, 2012

Valdez-Mondragón, Alejandro, 2012, A new species of the spider genus Pomboa Huber (Araneae: Pholcidae) from Colombia, Zootaxa 3420, pp. 38-40 : 38-40

Pomboa quimbaya new species

Figures 1-14

Type material. COLOMBIA: Quindío : 1 male holotype ( CNAN T0083), [4 December 2011; A. Valdez] from Universidad del Quindío , Ciudad de Armenia (lat 4.554488°, lon -75.661957; 1520 m), collected in tropical forest inside the university campus. Paratypes: 1 female ( CNAN T0084); 5 males, 1 female ( CNAN T0085), same data as holotype.

Etymology. The specific name is a noun in apposition and refers to the ethnic group and cultural region named Quimbaya , from Colombia.

Diagnosis. Distinguished from P. cali by the proximal apophyses on chelicerae (PA) which are larger and rounded with numerous setae (left arrow Fig. 4 ). From P. quindio by the presence of small and conical apophyses in distal part of the chelicerae, away from the fangs (right arrow Fig. 4 ). From P. pallida by its thinner, longer and curved procursus, with a dorsal large spine in proximal part (arrow, Fig. 8 ); this spine bears a longer membrane (M) ( Figs 8, 9 ). From other known congeners by the presence of two sclerotized and curved projections distally to the embolus, the ventral one longer than the dorsal ( Figs 7, 9 ); by the epigynum with a wide and curved apophysis in ventral view (arrow, Fig. 11 ); and by the epigynum with a median heart-shaped plate and two lateral oval plates ( Figs 12, 13 ).

Description. Male (Holotype). Prosoma: Pale beige, carapace marginally with a wide dark, gray, arc-shaped pattern on each side ( Fig. 2 ). Ocular region gray, slightly elevated ( Figs 1, 3 ). Fovea surrounded by wide gray region, joining posteriorly with the marginal gray pattern of the carapace ( Fig. 2 ). Clypeus pale orange, with a wide gray longitudinal pattern ( Fig. 3 ). Chelicerae brown in retrolateral part ( Fig. 5 ), orange prolaterally, and brownish distally ( Figs 4, 5 ). Sternum dark orange, with a gray central pattern ( Fig. 6 ). Labium gray; endites pale gray basally and dark gray distally; labium and endites white apically ( Fig. 6 ). Endites with retrolateral apophysis (arrow, Fig. 6 ). Legs: Coxae pale gray. Trochanters brown. Femora dark gray. Patellae, tibiae and metatarsi dark brown. Legs with high density of small vertical setae. Tibiae and metatarsi with curved setae. Tarsi pale brown. Femur I wider than the others. Opisthosoma: Blue, semi globular, longer than high ( Fig. 1 ). Plate of genital gonopore olive, small, wider than long, located ventrally on median part of opisthosoma. Ventrally, two blue thin lines in front of the plate of genital gonopore, and one wide and short line behind it. Palp: Femur orange, conical, curved ventrally; basally with oval retrolateral apophysis; ventrally with sub-distal small rounded apophysis ( Fig. 8 ). Patella dark orange and tibia brown. Procursus orange and wide basally, black in the distal half of the curved part ( Figs 8, 9 ). Embolus short, retrolaterally part with a sclerotized reddish line ( Fig. 10 ), ending near the spermatic aperture; distally with two curved sclerotized projections ( Fig. 7 ). Measurements: Total length 3.30. Carapace 1.47 long, 1.50 wide. Clypeus 0.58 long. Distance ALE-PME 0.12. PME-PME 0.15. Diameter AME 0.08. PME 0.13. Leg I: 31.32 (femur 7.60 + patella 0.60 + tibia 8.15 + metatarsus 12.60 + tarsus 2.37), tibia II: 5.15, tibia III: 3.90, tibia IV: 4.95; tibia I l/d 51.25.

Female (Paratype). (CNAN T0084). Similar to the male, differences: Prosoma: Clypeus with a gray longitudinal line wider than on males. Chelicerae brown. Sternum with a gray pattern lighter and wider than on males. Labium and endites brown. Legs: Femora, patellae, tibiae, metatarsi and tarsi brown, with less density of small vertical hair than the male. Leg I with the same width as the others legs. Opisthosoma: Blue, paler than on male, ventrally without lines or pattern. Epigynum: Wider than long ( Figs 12, 13 ), located in posterior part of the opisthosoma, near the spinnerets. PP oval, near to each other in diagonal position ( Fig. 14 ). Measurements. Total length 2.80. Carapace 1.20 long, 1.32 wide.

Clypeus 0.40 long. Distance ALE-PME 0.12. PME-PME 0.11. Diameter AME 0.06. PME 0.12. Leg I: 22.00 (5.40+0.50+6.00+9.10+1.00), tibia II: 3.70, tibia III: 2.80, tibia IV: 3.60; tibia I l/d 40.00.

Variation: (males N = 6, females N = 2). There is variation in the size and shape of the epigynum. In the female paratype (CNAN T0084; Fig. 12 ) the median heart-shaped plate is larger than in the female paratype (CNAN T0085; Fig. 13 ); moreover, in the paratype the median plate is next to the two lateral oval plates ( Fig. 12 ), whereas in the other female the median plate is separated from the lateral plates ( Fig. 13 ). Males: Carapace: width 1.20-1.60 (x = 1.39); tibia I: 8.10- 9.90 (x = 8.60); distance between apophyses on chelicerae: 0.35-0.45 (x = 0.41); Females: Carapace: width 1.25, 1.32; tibia I: 5.70, 6.00; epigynum: length 0.40, 0.45; width 0.65, 0.70.

Life history and habitat preferences. The specimens were collected from their irregular sheet webs. The webs were made in crevices in road-cuts, about 40 cm from the ground.

Distribution. Known only from the type locality.

Figures

FIGURES 1 ― 14. Pomboa quimbaya new species. Male (Holotype). 1, Habitus, lateral view. 2 - 3, Carapace, dorsal and frontal views respectively. 4 - 5, Chelicerae, frontal and lateral views respectively (left and right arrows indicate the proximal rounded apophyses and the distal conical apophyses on chelicerae respectively). 6, Prosoma, ventral view (arrow indicates the retrolateral apophysis of the endites). 8 - 9 Left palp, retrolateral and prolateral views respectively (arrow indicates dorsal spine of procursus). 7, 10, 11; Left bulb, dorsal, retrolateral and ventral views respectively (arrow indicates the wide and curved ventral apophysis). Females (Paratypes): 12 - 13, Epigynum variation, ventral view. 14, Epigynum, dorsal view. Scales: 1 mm (Fig. 1), 0.5 mm (Figs 2 - 11), 0.4 mm (Figs 12 - 14).