Niarchos barragani, Platnick & Duperre, 2010

Platnick, Norman I. & Dupérré, Nadine, 2010, The Andean Goblin Spiders Of The New Genera Niarchos And Scaphios (Araneae, Oonopidae), Bulletin of the American Museum of Natural History 2010 (345), pp. 1-120 : 13-25

Niarchos barragani , new species Figures 1, 2 , 28–120

TYPE: Male holotype from Berlese sample of cloud forest litter with palm taken at an elevation of 1405 m at Tandapi, 2 km from the main road to Quito, 0u239170S, 78u499040W, Pichincha, Ecuador (Dec. 7, 2009; N. Dupérre´, E. Tapia, Niarchos Exped. ), deposited in QCAZ (PBI_OON 399) .

ETYMOLOGY: The specific name is a patronym in honor of Álvaro Barragán, of the Pontificia Universidad Católica del Ecua- dor, in recognition of his vital collaboration in the planning and execution of the Niarchos Expedition.

DIAGNOSIS: Males resemble those of N. cotopaxi but have a longer, thinner embolus (figs. 36–40); females also resemble those of N. cotopaxi but have a shorter and anteriorly wider anterior process near the tip of the anterior receptaculum and have the posterior extensions of the anterior thumblike process diverging at a narrow angle (figs. 119, 120).

MALE (PBI_OON 400, figs. 1, 28–75): Total length 1.67. Posterior eye row recurved from above; PLE-PME separated by less than PME radius. Sternum surface finely reticulate. Endites with posteriorly directed process shaped like duck’s beak. Leg spination: tibiae: III v0-0-1p; IV v0-1p-1p; metatarsi IV v0-0- 1p. Embolar region widened, about as wide as bulb; bulb with strong basal projection on retroventral side (figs. 36–40).

FEMALE (PBI_OON 400, figs. 2, 76– 120): Total length 1.83. Leg spination: tibiae: III v0-0-1p; IV v0-1p-1p; metatarsi IV v0-0- 1p. Posterior margin of epigastric scutum with pair of paramedian extensions overhanging atrium (figs. 119, 120).

OTHER MATERIAL EXAMINED: Ecuador: Cotopaxi: Otonga, 0u259110S, 78u599410W, Dec. 8, 2009, hand collecting, forest litter, elev. 1705 m (N. Dupérre´, E. Tapia, Niarchos Exped., AMNH PBI _OON 397), 2 -, same (AMNH PBI_OON 431), 1 U, same, canopy fogging (AMNH, MACN PBI_OON 30552), 2 -. Pichincha: Tandapi, 2 km from main road to Quito, 0u239170S, 78u499040W, Dec. 7, 2009, hand collecting, elev. 1405 m (N. Dupérre´, E. Tapia, Niarchos Exped., AMNH PBI _OON 400), 3 -, 1 U; 15 km E Tandapi, June 7, 1976, Berlese, moss, forest litter, elev. 2300 m (S. Peck, FMNH PBI_OON 10562), 1 U; 16 km E Tandapi, June 20, 1975, Berlese, dry litter, bamboo-moss forest, elev. 6600 ft (S. Peck, FMNH PBI_OON 10536), 1 -, same (S. Peck, FMNH PBI_OON 37833), 1 U; 21 km N Tandapi on main road to Quito, 0u27920.30S, 78u45915.50W, Dec. 7, 2009, Berlese, sifted cloud forest litter, elev. 2150 m (N. Dupérre´, E. Tapia, Niarchos Exped., AMNH PBI _OON 398), 1 U. Santo Domingo de Los Tsáchilas: Otongachi, 0u199150S, 78u579060W, Dec. 6, 2009, hand collecting, forest litter, elev. 855 m (N. Dupérre´, E. Tapia, Niarchos Exped., AMNH PBI _OON 405), 1 -, 1 U; Tinalandia, 0u179560S, 79u039090W, Dec. 6, 2009, hand collecting, forest litter, elev. 720 m, pair taken in copulation (E. Tapia, Niarchos Exped., AMNH PBI _OON 401), 1 -, 1 U, same, Berlese, forest litter (N. Dupérre´, E. Tapia, Niarchos Exped., AMNH PBI _OON 402), 1 U, same, forest litter, hand collecting (B. Baehr, Niarchos Exped., AMNH PBI _OON 403), 1 U, same (N. Dupérre´, E. Tapia, Niarchos Exped., AMNH, QCAZ, MACN PBI _OON 404), 9 -, 5 U; Tinalandia, 16 km NE Santo Domingo, June 5, 1976, Berlese, forest litter, elev. 700 m (S. Peck, FMNH 33711, PBI_OON 10213), 2 -, Berlese, debris from termite nests (S. Peck, FMNH PBI_OON 37832), 1 U.

DISTRIBUTION: Western slopes of the Andes, in the Santo Domingo region of central Ecuador.

Figures

Figs. 1–4. Posterior views of sternum and pedicel. 1. Niarchos barragani, new species, male. 2. Same, female. 3. Scaphios yanayacu, new species, male. 4. Same, female.

Figs. 28–40. Niarchos barragani, new species, male. 28. Habitus, dorsal view. 29. Same, ventral view. 30. Same, lateral view. 31. Carapace, dorsal view. 32. Habitus, anterior view. 33. Carapace, lateral view. 34. Epigastric region, ventral view. 35. Sternum and mouthparts, ventral view. 36. Embolus, ventral view. 37. Same, prolateral view. 38. Palp, prolateral view. 39. Same, ventral view. 40. Same, retrolateral view.

Figs. 41–48. Niarchos barragani, new species, male. 41. Habitus, dorsal view. 42. Same, lateral view. 43. Carapace, dorsal view. 44. Same, lateral view. 45. Same, anterior view. 46. Sternum, ventral view. 47. Chelicerae, anterior view. 48. Same, posterior view.

Figs. 49–56. Niarchos barragani, new species, male. 49. Labium and endites, ventral view. 50. Labrum and endites, dorsal view. 51. Serrula, dorsal view. 52. Trichobothrium, tibia II, lateral view. 53. Claws, leg I, oblique lateral view. 54. Same, leg II, distal view. 55. Same, leg III, lateral view. 56. Same, leg IV, lateral view.

Figs. 57–64. Niarchos barragani, new species, male. 57. Tibia III, prolateral view. 58. Metatarsus III, same. 59. Tarsal organ, leg I, dorsal view. 60. Same, leg II. 61. Same, leg III. 62. Same, leg IV. 63. Same, palp. 64. Embolus, ventral view.

Figs. 65–72. Niarchos barragani, new species, male. 65. Cuticle of dorsal abdominal scutum, dorsal view. 66. Epigastric region, ventral view. 67. Sperm pore, ventral view. 68. Respiratory system, dorsal view. 69. Spinnerets, distal view. 70. Anterior lateral spinneret, same. 71. Posterior median spinneret, same. 72. Posterior lateral spinneret, same.

Figs. 73–78. Niarchos barragani, new species. 73. Male palp, prolateral view. 74. Same, ventral view. 75. Same, retrolateral view. 76. Female carapace, dorsal view. 77. Same, lateral view. 78. Same, anterior view.

Figs. 79–86. Niarchos barragani, new species, female. 79. Habitus, dorsal view. 80. Same, lateral view. 81. Chelicerae, anterior view. 82. Same, posterior view. 83. Labium and endites, ventral view. 84. Labrum and endites, dorsal view. 85. Serrula, dorsal view. 86. Sternum, ventral view.

Figs. 87–94. Niarchos barragani, new species, female. 87. Palp, prolateral view. 88. Palp, retrolateral view. 89. Palpal tibia, dorsal view. 90. Palpal tarsus, dorsal view. 91. Claws of leg I, distal view. 92. Same, leg II. 93. Same, leg III. 94. Same, leg IV.

Figs. 95–102. Niarchos barragani, new species, female. 95. Tarsal organ, leg I, dorsal view. 96. Same, leg II. 97. Same, leg III. 98. Same, leg IV. 99. Same, palp. 100. Leg I, retrolateral view. 101. Tibia III, lateral view. 102. Tibia IV, same.

Figs. 103–110. Niarchos barragani, new species, female. 103. Metatarsus III, lateral view. 104. Metatarsus IV, lateral view. 105. Trichobothrial base, tibia IV, dorsal view. 106. Epigastric region, ventral view. 107. Spinnerets, distal view. 108. Genitalia, ventral view. 109. Same, dorsal view. 110. Same, anterior view.

Figs. 111–120. Niarchos barragani, new species, female. 111. Habitus, dorsal view. 112. Same, ventral view. 113. Carapace, dorsal view. 114. Sternum and mouthparts, ventral view. 115. Habitus, lateral view. 116. Same, anterior view. 117. Carapace, lateral view. 118. Epigastric region, ventral view. 119. Genitalia, ventral view. 120. Same, dorsal view.