Luzonacera peterjaegeri Li & Li

Chang, Wan-Jin, Li, Fengyuan & Li, Shuqiang, 2019, Three new species of the spider genus Luzonacera Li & Li, 2017 from Philippines (Araneae, Psilodercidae), ZooKeys 822, pp. 17-31 : 24-25

Luzonacera peterjaegeri Li & Li sp. n. Figs 7, 8, 9, 10

Types.

Holotype: ♂ (SMF), Philippines, Northern Luzon Island, Teresita State, Cagayan Province, Lower Kimmabalyu Cave, 18°11'35.4"N, 121°52'10.3"E, 22.I.2015, H. Steiner. Paratypes: 1♂, 2♀ (SMF), same data as holotype.

Etymology.

The species is named after Peter Jäger in honour of his contribution to the study of spiders from Asia; name in genitive case.

Diagnosis.

Luzonacera peterjaegeri sp. n. can be distinguished from all other known species of the genus by a distinct constriction on the central part of the bulb (Figure 7A); females can be distinguished by two types of spermathecae: one pair of slender spermathecae bearing a globose distal part, and one pair of oblique, tube-shaped spermathecae (Figure 8A; versus both pairs of spermathecae bearing a globose distal part in other species). Moreover, both sexes of L. peterjaegeri sp. n. have longer chelicerae (Figure 8; versus shorter chelicerae in other species).

Description.

Male (Holotype). Total length 4.00; carapace 1.50 long, 1.40 wide; abdomen 2.50 long, 1.00 wide. Carapace round, pale brown, with three longitudinal brown bands, with the middle band 3 times wider than the lateral bands (Figure 8C). Fovea shallow and brown. Anterior margin of thoracic region distinctly elevated. Chelicerae long, brown with lamina, promargin with one tooth, and retromargin with two small teeth (Figure 9C). Clypeus brown with two pale rounded areas laterally and two relatively longer protrusions basally. Labium brown. Sternum brown with three dark brown patches laterally. Abdomen elongated, with complex patterns dorsally and ventrally. Leg measurements: all legs missing. Right palp (Figure 7 A–E): tibia swollen at the base, length/width = 2.25; cymbium with distal protrusion, length/width = 3.4; bulb light brown, pyriform; embolus forms a slender spiral elongating terminally from bulb.

Female (paratype). General features and coloration are similar to male, but the female is slightly larger (Figure 8D, E). Measurements: total length 4.17; carapace 1.60 long, 1.28 wide; abdomen 2.56 long, 1.5 wide. Legs missing. Internal genitalia: two pairs of spermathecae, one pair of spermathecae globose distally with long stalks (ca. 6 times longer than distal parts), the other pair are oblique, tube-shaped spermathecae (Figure 8A).

Distribution.

Type locality only (Figure 10).

Comments.

Based on the 651 bp aligned sequences, the COI uncorrected K2P-distance between L. peterjaegeri sp. n. and L. chang is 15.9%, and between L. peterjaegeri sp. n. and L. duan is 13.9%.