Trogolaphysa octosetosa Soto-Adames, 2015, sp. nov.
Creators: name: Soto-Adames, Felipe N.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Paronellidae
Trogolaphysa
Trogolaphysa octosetosa

description: Trogolaphysa octosetosa sp. nov.
Figs. 4 F, 18A–F Table 4
Etymology. The epithet refers to the presence of 5 and 3 posterior macrochaetae on the meso- and metathorax, respectively.
Material examined. Holotype female, in preparation. MEXICO, Yucatan, Chichen Itza, Berlese sample, leaf mould from moist woods and dry cenote, 25.vi.1951, L. J. Stannard, coll., acc. no. 49763, INHS 579,835; 3 paratypes in preparation and 73 in alcohol (mostly small juveniles in poor condition) with same collection information as holotype.
Description. Size up to 2.0 mm.
Color pattern. Body with evenly distributed granular light blue pigment (Fig. 4 F), more intense on coxae; head lighter
Head. Antennae up to 2.1x head length. Guard sensillum of subapical sense organ relatively large, truncate; sensillar pit not seen. Sensilla in Ant. 3 sense organ laterally expanded. Eyes 6, eyes G and H absent; eye valley with 3 ciliate chaetae. Head dorsally with 2 anterior (A0, A2) and 2 posterior (Pa5, Pm3) macrochaetae. Pre-labral chaetae weakly ciliate. Spines on distal margin of labrum distinct, separated. Labial triangle variable, M1 and M2 smooth or ciliate, either only one ciliate or both ciliate; r smooth and shortest of all; chaetae E, L1 and L2 ciliate; anterior chaetae smooth. Post-labial field with 6–9 ciliate chaetae between columns I and O.
Body. Body macrochaetae 53/0243+0+6. Mesothorax with 1 anterior (a5) and 5 posterior (p3 complex) macrochaetae (Fig. 18 A). Metathorax with 3 (a2, p2, p3) macrochaetae (Fig. 18 B). Abd. 1 chaeta a6 absent. Abd. 4 (Fig. 18 C) with pseudopore inserted in field posterior to T4; macrochaetae A3, A5 and B5 present; A 3 in field anterior to T2; A5 closer to pseudopore than B5; 6 large lateral macrochaetae present. Posterior chaetae 9–10+9– 10.
Legs: Trochanteral with up to 28 chaetae. Metathoracic claw complex as in Fig. 18 D: tenent hair spatulate on all legs, 1.1x as long as unguiculus; claws with 4 inner teeth, one basal tooth slightly wider and longer than other, proximal unpaired tooth shorter than basal teeth but well developed, distal unpaired tooth minute; teeth spread as 38%, 42%, 60%, 86%. Dorsal and lateral teeth ending on basal quarter of unguis, lateral teeth subequal to dorsal tooth. Unguiculus lanceolate, varying from narrow to normal, posterior edge smooth (Fig. 18 D).
Furcula. Dens with 2 rows of ciliate spines: with up to 23 inner and 19 outer spines. Mucro with 4 sequential teeth (Figs. 18 E–F); mucro subrectangular in shape ≈ 2.3x as long as width of distal end of dens and 0.85x as long as inner margin of metathoracic unguis.
Remarks. Trogolaphysa octosetosa sp. nov. is the only Neotropical member of the genus with 6 eyes, 2 anterior dorsal head macrochaetae, 5 mesothoracic macrochaetae and 3 metathoracic macrochaetae. Six other species (T. carpenteri, T. cotopaxiana, T. palaciosi sp. nov., T. paracarpenteri sp. nov., T. relicta and T. subterranea) have 2 anterior head macrochaetae, but none has 3 metathoracic macrochaetae (Table 4). The color pattern of T. octosetosa sp. nov. is identical to that in T. paracarpenteri sp. nov., but in addition to the difference in number of thoracic macrochaetae, the species differ in the number (3 in T. paracarpenteri sp. nov., 4 in T. octosetosa sp. nov.) and shape of inner ungual teeth (basal teeth needle shaped in T. paracarpenteri sp. nov., keelshaped in T. octosetosa sp. nov.). The indistinct, diffuse blue color pattern of T. octosetosa sp. nov. is also seen in T. jataca, T. geminata, T. riopedrensis (Mari Mutt, 1987), T. subterranea, T. paracarpenteri sp. nov. and T. luquillensis (Mari Mutt, 1987), but the number of thoracic macrochaetae and details of unguis morphology distinguish all species.
Trogolaphysa octosetosa sp. nov. was collected in sympatry with T. stannardi sp. nov. The paratypes of the two new species are mostly small juveniles, but color pattern and the relatively longer antennae in T. stannardi sp. nov. easily distinguish the species. In addition, adult T. stannardi sp. nov. are large and slender, whereas T. octosetosa sp. nov. adults are plump.
description: Published as part of Soto-Adames, Felipe N., 2015, The dorsal chaetotaxy of first instar Trogolaphysa jataca, with description of twelve new species of Neotropical Trogolaphysa (Hexapoda: Collembola: Paronellidae), pp. 1-41 in Zootaxa 4032 (1) on pages 32-35, DOI: 10.11646/zootaxa.4032.1.1, http://zenodo.org/record/289744