Phlogiellus daweiensis, Sivayyapram & Kunsete & Songsangchote & Thanoosing & Traiyasut & Warrit, 2020

Sivayyapram, Varat, Kunsete, Chawakorn, Songsangchote, Chaowalit, Thanoosing, Chawatat, Traiyasut, Prapun & Warrit, Natapot, 2020, Two new species of the Southeast Asian Dwarf tarantula genus Phlogiellus Pocock 1887 (Theraphosidae, Selenocosmiinae) and a discussion on the taxonomic problem of the genus, Zootaxa 4859 (4), pp. 487-506 : 490-497

publication ID	https://doi.org/ 10.11646/zootaxa.4859.4.2
publication LSID	lsid:zoobank.org:pub:751BFE57-265B-4F06-920D-1F781DA57199
DOI	https://doi.org/10.5281/zenodo.4537374
persistent identifier	https://treatment.plazi.org/id/C01F3B21-FFBE-FFD3-14A6-FEAFFBB9301B
treatment provided by	Plazi
scientific name	Phlogiellus daweiensis
status	sp. nov.

Treatment

Phlogiellus daweiensis View in CoL sp. nov. Sivayyapram & Warrit 2020

( Figs 1a, b View FIGURE 1 , 2a, b View FIGURE 2 , 3a, b View FIGURE 3 , 4 View FIGURE 4 a–d, 5a–c, 6a, b, 7a, b, 8a–d, 9a–c. Tables 1, 2) zoobank.org:act: 098A7449-8D97-432C-B024-001E8E927AC6

Type material. Holotype ♂. MYANMAR: Dawei (14°4.272’ N, 98°15.913’ E) 179 m, 4 May 2018, Warrit N. et al. (ARA-2018-159) GoogleMaps . Paratypes 1 ♀ allotype, same data as holotype (ARA-2018-160) GoogleMaps ; 2 ♂, 2 ♀ Myanmar, Dawei (13°48.361’ N, 98°09.564’ E) 19 m, 3 May 2018, Warrit N. et al. (ARA-2018-177–180).

Diagnosis. Males differ from those of other Phlogiellus species, except P. moniqueverdezae , in possessing long white setae dorsally on tibiae and metatarsi I and II ( Fig. 1a View FIGURE 1 ) and from the latter species in the absence of a maxillary lyra and embolus process ( Figs 3b View FIGURE 3 , 5 View FIGURE 5 ). Females differ from those of P. moniqueverdezae in the less swollen tip of the spermathecae and the narrower spermathecal groove ( Fig. 9 View FIGURE 9 ).

Description. Male Holotype; ARA-2018-159 (Measurements in mm): coloration (alive; Fig. 1a View FIGURE 1 ): carapace black, covered with short fine brown hair, lateral and posterior margins with curved brown bristles. Abdomen hirsute with reddish brown hair with black bristles and long white setae. Palp uniformly black. All pedal femora, patellae and tarsi black; distal tibiae and entire metatarsi covered with white setae, distinct on legs I and II. Body length: with chelicerae 18.08; without chelicerae 15.04. Carapace ( Fig. 2a View FIGURE 2 ): length to width 1.19 (6.56 length, 5.52 width). Ocular tubercle ( Fig. 2a View FIGURE 2 ): wider than long; width to length 1.58 (0.96 length, 1.52 width); clypeus absent; Eye group ( Fig. 2a View FIGURE 2 ): rectangular in shape, on ocular tubercle; anterior eye row slightly procurved; posterior eye row recurved. AME> ALE> PLE> PME. Fovea ( Fig. 2a View FIGURE 2 ): straight, 3.52 from ocular tubercle; fovea width similar to ocular tubercle width. Labium ( Figs 2b View FIGURE 2 , 3a View FIGURE 3 ): sub-rectangular, wider than long; width to length 1.36 (0.88 length, 1.2 width); anterior margin slightly concave with row of setae; ventrally with black bristles and patch of cuspules on anterior 1/3 (ca. 230–240; <1 diameter apart). Labiosternal groove distinct, a continuous narrow groove. Sternum ( Fig. 2b View FIGURE 2 ): ventrally with black bristles and fine hair uniformly; length to width 1.11 (3.12 length, 2.80 width). Sigilla: three pairs: anterior pair indistinct, close to sternal margin, opposite coxae I; median pair ovoid, <1 diameter from sternal margin, opposite coxae II; posterior pair ovoid, clearly bigger and more slender than other pairs, ≥ 1 diameter from sternal margin, opposite coxae III. Maxillae ( Figs 2b View FIGURE 2 , 3 View FIGURE 3 ): anterior maxillary process well developed; ventrally with black bristles and triangular patch of cuspules in proximal anterior corner of heel (ca. 120–130; 2–3 diameters apart); prolaterally with rows of long black setae above suture and on anterior face on which a lyra should occur, lyra entirely absent. Chelicerae ( Fig. 4 View FIGURE 4 ): 4.00 length, 2.24 width, prolaterally with 8 promarginal teeth, ca. 20 mesoventral denticles, [intercheliceral pegs absent]; retrolaterally with rows of strong black erect striker-like setae (hereafter pseudostrikers; ca. 40) on retroventral margin. Spinnerets: PMS 0.80 length; PLS 4.00 length (1.60, 0.80, 1.60). Palp and legs: measurements: pedipalp length: 10.56 (3.60+2.16+3.20+1.60), leg I: 20.16 (5.84+3.68+5.12 +3.52+2.00), leg II: 17.12 (5.04+3.12+3.84+3.20+1.92), leg III: 14.24 (4.24+2.40+2.88+2.96+1.76), leg IV: 20.16 (5.68+2.96+4.56+4.88+2.08); palpal tibia ventrally with line of glabrous area along almost the tibia length; tibial spur absent on all legs, paired tarsal claws and palpal claw with 2–4 small teeth; third claw present only on leg IV; tarsal weakness, evident as a pale area ventrally and laterally, on all legs. Scopula: full length on all leg tarsi, palpal tarsi and metatarsi I–II; 2/3 from distal metatarsi III; and 1/2 from distal metatarsi IV. Scopula may be undivided (tarsi I, metatarsi I, III), clearly divided with rows of setae (tarsi and metatarsi IV), undivided but with row of setae (tarsi and metatarsi II and tarsi III). Spines: absent on metatarsi I; metatarsi II with 1 dV; metatarsi III with 3 dV, and 2 dD and metatarsi IV with 3 dV. Genitalia ( Fig. 5 View FIGURE 5 ): subtegulum partly concave; haematodoca less developed; embolus tapers and tapering to the tip; with retrolateral keel and shallow basal lobed; basal part of the embolus without any process.

Variation. Male (Holotype and 2 male Paratypes; N=3): body length: with chelicerae 15.20–18.08 (16.37±1.51); without chelicerae 12.64–15.04 (13.92±1.21). Carapace 5.44–6.56 (6.11±0.59) length, 5.20–5.52 (5.39±0.17) width. Maxillary cuspules 113–153. Labial cuspules 221–235. Variation of palp and leg measurements are shown in Table. 1. No significant difference in their genitalia.

Description. Female. Allotype; ARA-2018-160 (Measurements in mm): coloration (alive; Fig. 1b View FIGURE 1 ): uniformly reddish brown. Carapace hirsute with brown hair; lateral and posterior margin possesses curved brown bristles. Abdomen hirsute with reddish brown hair with long white setae. Palp and legs reddish brown, darker in femora; leg patellae, tibiae and metatarsi with paler hair ring distally. Body length: with chelicerae 22.08; without chelicerae 18.68. Carapace ( Fig. 6a View FIGURE 6 ): length to width 1.18 (6.40 length, 5.44 width). Ocular tubercle ( Fig. 6a View FIGURE 6 ) wider than long; clypeus absent; width to length 1.67 (0.96 length, 1.60 width); clypeus absent. Eye group: in rectangular shape on ocular tubercle; anterior eye row slightly procurved; posterior eye row recurved. AME> ALE> ALE> PLE. Fovea ( Fig. 8a View FIGURE 8 ): straight, 3.52 apart to ocular tubercle; fovea width similar to ocular tubercle width. Labium ( Figs 6b View FIGURE 6 , 7 View FIGURE 7 ) sub-rectangular; wider than long; width to length 1.46 (1.04 length, 1.52 width); ventrally with black bristles and patch of cuspules on 1/3 of anterior part (ca. 320; <1 diameter apart); anterior margin with row of setae. Labiosternal groove distinct. Sternum ( Fig. 6b View FIGURE 6 ): ventrally with black bristles and fine hair uniformly; length to width 0.96 (3.44 length, 3.60 width). Sigilla: three-pairs; anterior pair indistinct close to sternal margin, opposite coxae I; median pair ovoid, <1 diameter from sternal margin, opposite coxae II; posterior pair ovoid, clearly bigger and more slender than other pairs, ≥ 1 diameter from sternal margin, opposite coxae III. Maxillae ( Fig. 7 View FIGURE 7 ): anterior conical process well developed; ventrally with black bristles and patch of cuspules in proximal anterior corner (ca. 150; 2–3 diameters apart); prolaterally with rows of long black setae above suture and on area that lyra would occur, lyra absent. Chelicerae ( Fig. 8 View FIGURE 8 ): 3.68 length, 2.80 width; prolaterally with 7 promarginal teeth, ca. 20 mesoventral dentricles, intercheliceral pegs absent; retrolaterally with row of pseudostrikers (ca. 50) on ventral margin, lyra absent. Spinnerets: PMS 1.20 length; PLS 4.40 length (1.76+1.20+1.44). Palp and legs: measurements: pedipalp length: 10.32 (3.28+2.32+2.24+2.88), leg I: 17.76 (5.20+3.60+3.92+3.04+2.00), leg II: 15.12 (4.72+2.80+3.28+2.48+1.84), leg III: 13.04 (4.72+2.80+3.28+2.48+1.84), leg IV: 18.16 (5.20+3.04+4.08+3.84+2.00); paired tarsal claws and palpal claw with two small teeth; third claw present only on leg IV; tarsal weakness present only as paler area on retrolateral of tarsus IV. Scopulae: full length on all legs and palp tarsi and metatarsi I–II; 3/4 from distal metatarsi III; and 1/2 from distal metatarsi IV. Scopula can be undivided (tarsi I–II), clearly divided with rows of setae (tarsi III–IV and metatarsi IV), undivided but possessed row of setae (metatarsi I–III). Spines: metatarsi I with 1 dV; metatarsi II with 3 dV; metatarsi III with 3 dV, 2 dL and 2 dD and metatarsi IV with 3 dV. Genitalia ( Fig. 9 View FIGURE 9 ): spermathecae unilobed, fused with non-sclerotized base; each lobe tombstone-shaped with slightly swollen apical.

Variation. Female (Allotype and 2 other female Paratypes; N=3): body length: with chelicerae 18.08–22.08 (20.11±2.00); without chelicerae 15.20–18.68 (17.32±1.86). Carapace 6.00–6.40 (6.16±0.0.21) length, 4.80–5.44 (5.20±0.35) wide. Maxillary cuspules 113–153. Labial cuspules 231–316. Variations of palp and leg measurements are showed in Table. 2. No significant different on their genitalia.

Etymology. .—The specific epithet refers to the type locality, Dawei City, Myanmar.

Distribution and natural history. Phlogiellus daweiensis sp. nov. was found in two localities more than 50 kilometers apart and divided by the Dawei River, both localities are in Dawei, Myanmar. All specimens were found in soil burrows on man-made road cuttings. Adult male specimens were found in their natural habitats in early May that might be correspond to their breeding season.