Campylothorax notidanus Soto-Adames, 2016, sp. nov.
Creators: name: Felipe N. Soto-Adames
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Paronellidae
Campylothorax
Campylothorax notidanus

description: Campylothorax notidanus sp. nov.
Figures 4 – 6
Etymology
The epithet refers to the greatly enlarged, conic metanotum.
Material examined
Holotype, on slide, Dominican Republic, La Vega, Cordillera Central, Loma Casabito, 15.8 km NW, Bonao, 19°2'11.976''N, 70°31'8.0034''W, 1455 m elevation, evergreen cloud forest, yellow pan trap, 28 May 2003, sample DR21262, J. Rawlins, C. Young, R. Davidson, C. Núñez, P. Acevedo; four paratypes on slides and 32 adults, subadults and juveniles in alcohol, same collection information as holotype; one paratype in alcohol, La Vega, Cordillera Central, 4.1 km SW El Convento, 19°2'15.5394''N, 70°42'48.024''W, 1730 m elevation, dense secondary evergreen forest, yellow pan trap, 31 May 2003, sample DR22262, J. Rawlins, R. Davidson, C. Young, C. Núñez and P. Acevedo.
Size. Up to 4.0 mm.
Colour pattern. Antennae white or lightly pigmented with purple (Figure 4 A); head light purple, Th. 2, anterio-lateral margins of Th. 3, coxae and trochanters dark purple; legs white distal to trochanter; Abd. 3 with separated medial and lateral spots or bands; Abd. 4 anteriorly with 1 – 3 paired narrow longitudinal stripes (Figure 4 A, C), sometimes reaching latero-medial patches; Abd. 4 triangular latero-medial patches (Figure 4 B, C) sometimes extending medio-posteriorly to join narrow band along posterior margin of segment (Figure 4 A); collophore and furcula white.
Head. Antennae broken beyond second antennal segment. Eyes 8 (Figure 5 A), eyes G and H reduced; eye valley with five ciliate chaetae. Head with up to 11 Mc along antennal margin and four other Mc along inner margin of eye patch. Head dorsally (Figure 5 A) with seven anterior (A0, A2, A3, A5, S3, S4, S5) and one posterior (Pa5) Mc. Pre-labral chaetae finely denticulate, appearing smooth at low magnification. Labral chaetae 5, 5, 4, all smooth; chaeta length heterogeneous (Figure 5 D): proximal row (P) with middle chaeta (P0) longest and P1 shortest; medial row (M) with second chaeta (M1) longest and M2 shortest; distal row (D) with inner chaeta (D1) longer than outer chaeta (D2). Peristomal chaetae ciliate, bothriotricha-like. Proximal pleural chaeta (pps) denticulate, appearing smooth at low magnification, distal chaeta (dps) reduced, short and smooth (Figure 5 D). Basal chaeta of maxillary palp ostensibly shorter than distal chaeta (Figure 5 E); sublobal plate with two short chaetae. Maxillary head with three teeth and four lamellae; lamella 1 apically acuminate, with a subapical rounded expansion and short, straight papillae (Figure 5 B, C), lamella 2 apically rounded, densely packed with micropapillae (Figure 5 B). Lateral appendage of labial papilla E not quite reaching tip of papilla (Figure 5 F). Labial palp with five smooth proximal chaeta. Labial triangle with M1M2rEL1l2A1 – 5 (Figure 5 G); r smooth 3/4 as long as E; l2 short, spine-like. All post-labial chaetae coarsely ciliate; with six chaetae along cephalic groove.
1Species not included due to inadequate descriptions: C. camelinus Womersley, 1930 and C. shae ff eri Börner, 1906.
2 1 + 1 means there are two columns, each with one seta; 2 + 2 means there are two columns each with two setae; 2 means there is only one column along the eye margin with two setae.
Body. Body Mc 23/0241+7+0+5. Th. 2-Abd. 3 tergal S-chaetae as 11/011?3, S-microchaetae as 10/10100. Th. 2 dorsally flat; Th. 3 greatly developed (Figures 4 A, B and 5H), conic, extending posteriorly to cover medial section of Abd. 1 to intersegmental membrane with Abd. 2. Th. 2 with one S-chaeta and one S-microchaeta on lateroanterior corner, and two Mc in p3 complex (Figure 5 H); Th. 3 with one latero-anterior S-chaeta and three Mc in p2-3 complex. Abd. 1 with one anterior S-microchaeta; chaeta a6 absent. Abd. 2 (Figure 5 I) with two bothriotricha (m2, a5), two Mc (m3, m5), and S-chaeta as; number and distribution of lateral microchaetae unclear. Abd. 3 (Figure 6 A) with three bothriotricha (m2, a5, m5), four Mc (m3, am6, pm6, p6), S-chaeta as, S-microchaeta d2 inserted posterior to Mc p6, and five lateral mesochaetae. Abd. 4 (Figure 6 C) with four bothriotricha (B6, T2, T4, an secondary bothriotrix F3p?/F3 near latero-posterior margin); S-chaetae as and ps present, additional S-chaetae present but specimen condition does not allow us to ascertain their number. Pseudopore on Abd. 4 inserted in field just posterior to T4; tergum with eight inner Mc, one medial unpaired and seven paired (Figure 6 C): anterior triangle formed by paired A1 and one medial unpaired Mc; Mc A3 anterior and internal to pseudopore; Mc A5 and A6 near posterior margin of segment; Mc B3, B4 and B5 forming a group; lateral Mc E2, E3, E4, F1 and F3 present, E1 a microchaeta, E4 inserted anterior to D2, F2 absent. Posterior chaetae 23 – 34. Chaetotaxy of Abd. 5 as in C. sabanus (Figure 3 E).
Legs. Trochanteral organ with up to 54 chaetae. Th. 3 claw complex as in Figure 6 B: tenent hair spatulate, relatively long, surpassing level of inner paired ungual teeth; claws with three inner teeth; basal teeth short, subequal, inserted on basal half of inner edge; unpaired tooth shorter than basal teeth, inserted on distal half of inner edge. Outer teeth ending on basal quarter of unguis (Figure 6 D); lateral teeth short but conspicuous; dorsal tooth short, clearly visible only on dorsal perspective. Unguiculus shorter on fore and middle legs than on hind legs, usually truncate, sometimes lanceolate, with a small inner tooth; posterior lamella smooth.
Furcula. Dens with one inner and one outer row of spines. Mucro with five teeth, typical for genus, but unusually short, 0.6 – 0.8 as long as inner edge of hind claw (Figure 6 E).
Remarks
Campylothorax notidanus sp. nov. is the only member of the genus with a greatly enlarged, dorsal fin-shaped metathorax. The species is also unusual in having a greatly reduced dorsal chaetotaxy, with only three dorsal head Mc in row S, two Mc on Th. 2 p3 complex, three Mc on Th. 3 p2 – 3 complex and lacking Abd. 4 lateral Mc F2. The new species shares with C. hexosetosa sp. nov. the number and arrangement of inner Mc on Abd. 4, and the number and arrangement of lateral mesochaetae on Abd. 3, but otherwise it is quite different from all known Campylothorax (Table 2).
The identity of thoracic Mc is unclear. The two Mc on Th. 2 are probably homologous with p2 and p3, whereas those on Th. 3 may be a2, p2 and a4. Unfortunately, all of the specimens studied are opaque and the microchaetae that could provide points of reference on the identity of the Mc are invisible.
description: Published as part of Felipe N. Soto-Adames, 2016, Chaetotaxy of first-instar Campylothorax sabanus (Wray), and description of three new Campylothorax species from Hispaniola (Collembola, Paronellidae), pp. 1583-1612 in Journal of Natural History 50 (25) on pages 1593-1598, DOI: 10.1080/00222933.2016.1145272, http://zenodo.org/record/269880