Triaeris ibadan, Platnick & Dupérré & Ubick & Fannes, 2012

Platnick, Norman I., Dupérré, Nadine, Ubick, Darrell & Fannes, Wouter, 2012, Got Males?: The Enigmatic Goblin Spider Genus Triaeris (Araneae, Oonopidae), American Museum Novitates 2012 (3756), pp. 1-36 : 33-34

Triaeris ibadan , new species

Figures 81–134

TYPE: Male holotype taken in pitfall trap in fallow bush plot at the International Institute of Tropical Agriculture, Ibadan, Oyo, Nigeria (Nov. 1974; A. Russell-Smith), deposited in MRAC (177439, PBI_OON 9629) .

ETYMOLOGY: The specific name is a noun in apposition taken from the type locality.

DIAGNOSIS: Members of this species can easily be distinguished from all their congeners by the highly patterned legs (fig. 129).

MALE (PBI_OON 9629, figs. 81–107, 126–128): Total length 1.32. Carapace brown, sides smooth, with indistinct longitudinal dark stripe, extending from opposite coxae II to opposite coxae IV; dark longitudinal stripe present along midline. ALE, PLE subequal, larger than PME; ALE separated by their radius to diameter; posterior eye row procurved from front. Sternum, chelicerae yellow. Labium, endites dark red-brown. Endites medially with protuberances over sides of labium, distally elaborate. Dorsal scutum brown, covering most of abdomen length, more than half of abdomen width. Postepigastric scutum yellow, short, almost rectangular, covering about 1/3 of abdomen length. Legs with femora, basal portions of tibiae, patellae darkened. Leg spination: patellae: I v0-1p-1r; II v0-0-1p; tibiae: I v2-4-0; II v1p-1p-0; IV v0-0-2. Palp with proximal segments yellow-brown; cymbium yellow; bulb yellow; embolus simple, straight process.

FEMALE (PBI_OON 32995, figs. 108–125, 129–134): Total length 1.28. Labium and endites yellow. Postepigastric scutum without posteriorly directed lateral apodemes. Leg spination: patellae: I v0-1p-1r; II v0-0-1p; tibiae: I v2-4-0; II v2-2-0; IV v0-0-2. Posterior receptaculum with triangular posterior invagination, anterior receptaculum elaborate.

OTHER MATERIAL EXAMINED: Nigeria: Oyo: International Institute of Tropical Agriculture, Ibadan (all collected by A. Russell-Smith, pitfall traps), Jan. 26–Mar. 28, 1973 ( MRAC 223940 , 224053 , PBI_ OON 9133, 9637), 1♂, 1♀ , Feb. 3, 1973, fallow bush plot ( MRAC 237790 , PBI_OON 32996), 1♀ , Apr. 23, 1973 ( MRAC 160360 , 224057 , PBI_OON 9077, 9597), 2♂, 4♀ , May 11, 1973, C.O.P.R. site ( MRAC 223930 , 224058 , PBI_OON 9155, 9538), 1♂, 2♀ , Oct. 10–18, 1973, 10-year regrowth ( MRAC 223924 , 224055 , PBI_OON 9161, 9962), 1♂, 1♀ , Nov. 1973, bush fallow ( MRAC 223922 , 224054 , PBI_OON 9127, 9604), 1♂, 2♀ , Feb. 24–May 5, 1974, riverine woodland ( MRAC 160356 , 223920 , 223923 , 223925 , 224052 , 224059 , PBI_OON 9078, 9249, 9672, 9911, 9912), 4♂, 3♀ , June 9, 1974 ( MRAC 223921 , PBI_ OON 9966), 1♀ , Nov. 1974, fallow bush plots ( MRAC 223926 , PBI_OON 9084), 2♀ , Apr. 3–10, 1981, forest ( MRAC 235824 , PBI_OON 32995), 7♂, 5♀ , Feb. 24, 1982, in bush fallow near golf course ( MRAC 177246 , PBI_OON 9325), 1♀ .

DISTRIBUTION: Nigeria.

Figures

FIGURES 81–95. Triaeris ibadan, new species, male. 81. Carapace, dorsal view. 82. Same, lateral view. 83. Same, anterior view. 84. Chelicerae, anterior view. 85. Same, posterior view. 86. Labium and endites, ventral view. 87. Labrum and endites, dorsal view. 88. Labrum, dorsal view. 89. Sternum, ventral view. 90. Enlarged seta on sternum, ventral view. 91. Sperm pore, ventral view. 92. Spinnerets, apical view. 93. Anterior lateral spinneret, same. 94. Posterior median spinneret, same. 95. Posterior lateral spinneret, same.

FIGURES 96–110. Triaeris ibadan, new species, male (96–107) and female (108–110). 96. Claws of leg I, lateral view. 97. Same, leg II. 98. Same, leg III. 99. Claws of leg IV, distal view. 100. Tarsal organ from leg I, dorsal view. 101. Same, leg II. 102. Same, leg III. 103. Same, leg IV. 104. Same, palp. 105. Left palp, prolateral view. 106. Same, retrolateral view. 107. Palpal patella, prolateral view. 108. Carapace, dorsal view. 109. Same, lateral view. 110. Same, anterior view.

FIGURES 111–125. Triaeris ibadan, new species, female. 111. Chelicerae, anterior view. 112. Same, posterior view. 113. Cheliceral retromargin, posterior view. 114. Labium and endites, ventral view. 115. Labrum and endites, dorsal view. 116. Serrula, dorsal view. 117. Sternum, ventral view. 118. Epigastric area, ventral view. 119. Palp, prolateral view. 120. Same, retrolateral view. 121. Palpal tibia, dorsal view. 122. Spinnerets, apical view. 123. Anterior lateral spinneret, same. 124. Posterior median spinneret, same. 125. Posterior lateral spinneret, same.

FIGURES 126–134. Triaeris ibadan, new species, male (126–128) and female (129–134). 126. Sternum and mouthparts, ventral view. 127. Left palp, prolateral view. 128. Same, retrolateral view. 129. Habitus, dorsal view. 130. Abdomen, ventral view. 131, 133. Epigastric area, ventral view. 132, 134. Internal genitalia, dorsal view.