Myrmarachne jianfenglin Barrion

Alberto T. Barrion, Aimee Lynn A. Barrion-Dupo, Josie Lynn A. Catindig, Sylvia C. Villareal, Ducheng Cai, Qianhua Yuan & Kong Luen Heong, 2016, NEW SPECIES OF SPIDERS (ARANEAE) FROM HAINAN ISLAND, CHINA, UPLB Museum Publications in Natural History 3, pp. 1-103 : 23-24

Myrmarachne jianfenglin Barrion , Barrion- Dupo & Heong, new species [ Figure 25 A-E]

FEMALE. Holotype female, total length 7.10 mm. Cephalothorax length 2.20 mm, width 1.10 mm. Petiole length 1.70. Abdomen length 3.00 mm, width 1.00 mm.

Carapace. Black, twice longer than wide and sparsely lined with short white hairs. Cephalic subquadrate and moderately convex, separated from the narrower, rounded and strongly convex thoracic area by a deep transverse groove. Lateral groove lined with clubbed hairs. Chelicerae relatively short, 2x longer than wide, reddish brown with a short fang. Promargin has four teeth, second apical tooth the largest. Retromargin pluridentate with a saw-like series of eight very small teeth. Pedipalps black with tip of tarsus oblique and yellow. Maxillae longer than wide, dark reddish brown except yellow inner margin, parallel-sided but apices moderately diverging. Labium black with yellow apical one-fifth, longer than wide. Sternum black, sword-like with broader anterior half and pointed posterior half, 6x longer than wide. Broadest portion of sternum in between coxa II and III.

Eyes. In three rows of 4, 2 and 2 with a long bristle near each PME. Eye row length (mm): PLER (1.17)> AER (1.10)>PMER (1.00). Eye diameter (mm): AME (0.40)> ALE=PLE (0.19)> PME (0.05). Eye separation (mm): PME-PME (0.93)> PLE-PLE (0.90)> ALE-PME (0.19)> AME-AME (0.14)> AME-ALE (0.13). Clypeus height 5.7x AME diameter.

Legs. I and II yellow with inner lateral black bands in femora, both side of patella I and II and tibiae I and II, metatarsus I black and tarsus I with black bands on both apical half of both sides. Coxa I yellow with black prolateral band and II yellow. Leg III black from coxa to tibia, basal one-fourth with a black lateral band, rest of segments yellow including tarsus. Leg IV with prolaterals of coxa black, trochanter yellow, femur to tibia and basal half of metatarsus black, apical half of metatarsus and entire tarsus yellow. Base of patella IV yellow. Spination in tibia I and II 0-8-0-0 and metatarsi I and II 0-4-0-0. Legs III and IV without spines. Leg formula 4312.

Abdomen. Black with an oblique white lateral stripe projected towards the abdominal groove, prominently elongated and about 3x longer than wide. In lateral view, abdomen bears two lobes — a globose anterior with a dorsal hair in the midlobe and an elongated posterior. Venter black except the white band extension from the laterals. Spinnerets short and black.

Epigynum has a subglobose plate with a double J band lying side by side to each other in uncleared state. Pear-shaped in cleared form with a circular ring posterior of the four- twisted coiled spermathecae. Smaller spermathecae transversely ovoid both in the center of the circular ring. Copulatory tubes long and parallel to each other.

MALE. Unknown.

Material Examined. Holotype female (coll. no. Yu 10), CHINA, Hainan Island, Jianfenglin , Yulingu , 31 March-1 April 2011, ATBarrion, JLACatindig and SCVillareal.

Diagnostic Features. Closely resembles M. gisti Fox, 1936 and M. annamita Zabka, 1985 but differs from both taxa in the following features, (1) number of cheliceral teeth, (2) structure and coils in the epigynum, (3) very long petiole longer than abdominal width, anterior part very short barely one fifth petiole length, and (4) leg coloration.

Etymology. Named after the type locality.

26.

Figures

Figure 25 A-E. Myrmarachne jianfenglin Barrion, Barrion-Dupo & Heong, new species, holotype female (A), cheliceral teeth (B), anterior pedicel (C), ventral (D) and left dorsal (E) views of epigynum.