Cyphoderopsis phangnga, Jantarit, Sopark, Satasook, Chutamas & Deharveng, Louis, 2013

Jantarit, Sopark, Satasook, Chutamas & Deharveng, Louis, 2013, The genus Cyphoderopsis Carpenter (Collembola: Paronellidae) in Thailand and a faunal transition at the Isthmus of Kra in Troglopedetinae, Zootaxa 3721 (1), pp. 49-70 : 54-58

publication ID	https://doi.org/ 10.11646/zootaxa.3721.1.2
publication LSID	lsid:zoobank.org:pub:935F1F1B-F09B-4BD0-A102-8FE8515CDC04
DOI	https://doi.org/10.5281/zenodo.6155351
persistent identifier	https://treatment.plazi.org/id/E170A43E-0251-FFD6-588D-4DDDFB45FB19
treatment provided by	Plazi
scientific name	Cyphoderopsis phangnga
status	sp. nov.

Treatment

Cyphoderopsis phangnga sp. nov.

( Figs 2–4 View FIGURE 2 View FIGURE 3 View FIGURE 4 )

Type material (point C 3 in Fig. 1 View FIGURE 1 ). Holotype female and one paratype juvenile on slides. THAILAND: Phangnga province: Muang Phangnga district: near Tham Russi, 17.vii.1987, secondary forest, litter, Berlese extraction, L. Deharveng leg. (sample # THA-PAG-010). Coordinates: 98.513991° E, 8.427287°N; about at sea level.

One paratype on slide, probably subadult or female adult (genital plate not seen clearly): ibid: Tham Tapan entrance, 16.vii.1987, forest, litter, Berlese extraction, L. Deharveng leg. (sample # THA-PAG-005). Coordinates: 98.528222°E, 8.454946°N; altitude 20 m.

Four paratypes on slides, probably subadult or female adult (genital plate not seen clearly): ibid: near Tham Poung Chang sink, 19.vii.1987, secondary forest, litter, Berlese extraction, L. Deharveng leg. (sample # THA- PAG-017). Coordinates: 98.515148°E, 8.442797°N, altitude 20m.

Holotype and three paratypes in PSU; three paratypes in MNHN.

Description. Habitus relatively stout. Body length 0.9–1.2 mm excluding antennae and furca ( Fig. 2 View FIGURE 2 A). Lengths of body parts in Table 1 View TABLE 1 . Fourth abdominal segment 5 times as long as the third one along axis. Furca well developed, 2.2–2.6 times shorter than body length. Body colour white. Eyes absent, no ocular patch. Scales present on antennae, head, body and furca, absent on ventral tube.

Mouthparts. Mandible head with 4 (left) and 5 (right) teeth. Maxilla head stocky, with tridentate claw and 6 ciliate lamellae. Labial basis chaetotaxy: M1M2ReL1l2, all mesochaetae, except l2 which is laterally displaced and mic-size, with R shorter than M2 and e smooth ( Fig. 2 View FIGURE 2 B). Outer maxillary lobe with one basal chaeta, a simple palp and two sublobal hairs ( Fig. 2 View FIGURE 2 C). Labral formula 4/554, with 4 prelabral chaetae bent and ciliate, labral chaetae smooth and acuminate ( Fig. 2 View FIGURE 2 D); distal part of labrum adorned with two strong central pointed spines dorsally ( Fig. 2 View FIGURE 2 E) and a complex structure constituted of two asymmetrical combs and two small adjacent curved rods ventrally, like in C. thachana sp. nov. (see Fig. 5 View FIGURE 5 C).

Antennae. Antennae about 1.5 times as long as head. Scales present dorsally on Ant.I and II. Ordinary chaetae as ciliate mes, numerous on all antennal segments (types 1, 2, 4 on Fig. 2 View FIGURE 2 F), and a few smooth basal mic on Ant.I, II and III (type 11 on Fig. 2 View FIGURE 2 F). S-chaetae of various morphology, present on all antennal segments (types 3, 7, 8, 9, 10 on Fig. 2 View FIGURE 2 F). Types 5 and 6 may correspond to smooth and to very slightly serrated variants of a same type of chaeta. Ant.IV not subdivided or annulated ( Fig. 2 View FIGURE 2 G), apical bulb absent, subapical organ rather long, thick, slightly thickened distally ( Fig. 2 View FIGURE 2 H).

Dorsal chaetotaxy. Dorsal chaetae of 6 types: ciliate, very long and thin tric; serrated or ciliate mac, of various length and thickness; finely serrated and rather thin mes; modified mes around tric (enlarged with special morphology, Figs 3 View FIGURE 3 E, F). Sens of 2 types: dark, short, straight, pointed (type 1 on Fig. 3 View FIGURE 3 A) and longer, thinner, hyaline (type 2 on Fig. 3 View FIGURE 3 A).

Dorsal chaetotaxy and pseudopore arrangement illustrated on Figs 3 View FIGURE 3 B and D. Trichobothria formula 0, 0/0, 2, 3, 3. Macrochaeta formula 0/4, 0/0, 2, 4, 5. Dorsal pseudopore formula 1, 1/1, 1, 1, 1+4.

No dorsal mac on head except an antenno-basal row of 6–8 mac on each side; cephalic mes short, feebly serrated, equal, symmetrically arranged ( Fig. 3 View FIGURE 3 B). A pair of thin trichobothria-like chaetae present antero-laterally on head ( Figs 3 View FIGURE 3 B, C). Suture zone visible on head ( Fig. 3 View FIGURE 3 B). Thin serrated mes present on all tergites in uncertain number ( Fig. 3 View FIGURE 3 D). Th.II with 4+4 central mac and 2+2 antero-lateral sens (1+1 sens1 and 1+1 sens2). Th.III without mac, sens not seen. Abd.I without mac, with 1+1 sens1. Abd.II with 2+2 tric, 1+1 sens2 near internal tric, 1+1 mac external to internal tric, 1+1 mac external to external tric, and several modified mes around tric ( Fig. 3 View FIGURE 3 E).

Abd.III with 3+3 tric, 4+4 mac (1+1 near internal tric, 3+3 near postero-external tric), several modified mes around tric and 2+2 sens (1+1 sens2 anterior to internal tric, 1+1 sens1 posterior to external tric) ( Fig. 3 View FIGURE 3 E). Abd.IV with 3+3 tric (2+2 anterior, 1+1 postero-lateral), 5+5 dorsal mac (1+1 anterior to pseudopores, 1+1 near T2, 1+1 near T3, 2+2 posterior), and several mac external to the anterior trichobothrial complex T1-T2; several modified mes around T1 and T2; presence of short to medium-size chaetae, not easily assignable to mes or S-chaetae ( Fig. 3 View FIGURE 3 F). Abd.V with 2+2 sens2. Abd.VI chaetotaxy not analyzed.

Legs. Tibiotarsus chaetotaxy mostly composed of strongly to weakly ciliate mesochaetae, 2–3 shorter dorsal ciliate mes (1/5 of the long ones), one thick smooth ventro-subapical chaeta on hind tita, a dorso-apical tenent hair thin, smooth and acuminate on all tita, and 3 smooth pointed dorsal mic, the distal one close to the tenent hair ( Fig. 4 View FIGURE 4 A); distal row of 9–10 serrated chaetae arranged obliquely on all legs. Claw small, 7–8.5 times shorter than tita, moderately slender; with one small tooth at 60% of inner edge, a small dorsal tooth basally and a pair of inner basal teeth of unequal size ( Fig. 4 View FIGURE 4 B). Unguiculus pointed, narrow, lanceolate and elongate, 2/3 as long as claw, its external edge smooth ( Fig. 4 View FIGURE 4 B).

Ventral tube. With 3+3 long serrated mac anteriorly and at least 5–6 smooth mes on each lateral flap ( Fig. 4 View FIGURE 4 C); posteriorly with 3 long smooth mes distally and a symmetrical pattern of normal and short ciliate mes ( Fig. 4 View FIGURE 4 D).

Furca. Tenaculum with 4 teeth on each branch and a strong, densely serrated, bent distally chaeta. Manubrium about 1.2 times longer than mucrodens. Dens about 3 times (subadult, Fig. 4 View FIGURE 4 E) to 3.8 times (female) as long as mucro. Manubrium with dorsal ciliate mes (none smooth) arranged in two longitudinal stripes separated by a glabrous axial stripe; ventrally with oval scales and a distal group of 2–3+2–3 ciliate mes. Dens elongate, hairy, with 2 dorso-lateral rows of spines; the external row with 10 (subadult, Fig. 4 View FIGURE 4 E) to 12 (female) thick, serrated, spiny chaetae, blunt apically (type 5 on Fig. 4 View FIGURE 4 F); the internal row with to 13–14 spines in subadult and 19 spines in female, subequal, pointed, smooth and shorter than the external ones (type 6–7 on Fig. 4 View FIGURE 4 F). Dorsally between the two spine rows, one (distally) to 3 (proximally) irregular lines of ciliate chaetae of various length (1–4 on Figs 4 View FIGURE 4 E, F). Scales on ventral and ventro-lateral sides of dentes, arranged in multiplets of 3–4 scales, more visible distally ( Fig. 4 View FIGURE 4 E); scales elongate, enlarged distally, of various morphology ( Fig. 4 View FIGURE 4 G). Mucro rather stout and rather long, straight, with 3 main teeth, the apical one blunt, the subapical one small and acute, the dorso-basal one acute and longer with 2 toothlets basally ( Fig. 4 View FIGURE 4 E).

Occurrence. Only known from type locality.

Habitat. Rainforest leaf litter at cave entrance.

Etymology. The species name is taken from the type locality.

Remarks. Cyphoderopsis phangnga sp. nov. is similar to C. kempi in having short antennae, long manubrium and mucro, and complex claw structure. It differs from it by the absence of an ocular patch and pigment (diffusely pigmented with an ocular patch in C. kempi ), smaller body size (0.9–1.2 mm versus 1.5 mm), pointed (versus clavate) tenent hairs, shorter dens (manubrium about 1.2 times as long as mucrodens, versus subequal) and absence of the distal scale appendage on dens figured by Carpenter (1917). Most characters of chaetotaxy and mouthparts are lacking in the original description of C. kempi , making a more detailed comparison impossible.