Phlogiellus raveni, 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 : 498-502

Phlogiellus raveni sp. nov. Sivayyapram &Warrit, 2020

( Figs 10a, b , 11a, b , 12a, b , 13 a–d, 14a–c, 15a, b, 16a, b, 17a–d, 18) zoobank.org:act: D9FE8B1B-7AAE-4626-94E6-7C311629983B

Type material. Holotype ♂. PHILIPPINES, Talamban, Cebu City, Small forest behind University of San Carlos. , 16–18 August 1986, Gerd Alberti ( QM S22518 a) . Paratypes 1 ♀ allotype, same data as holotype ( QM S22518 b) .

Diagnosis. Phlogiellus raveni sp. nov. differs from other Phlogiellus species, except P. aper , P. brevipes , P. mutus , P. bundokalbo , P. watasei , P. moniqueverdezae , P. longipalpus , and Phlogiellus daweiensis sp. nov. in lacking a maxillary lyra in both males and females. Phlogiellus raveni sp. nov. differs from those of the alyrate species of Phlogiellus , in the different shape of the male palpal bulb and shape of the female spermathecae ( Figs 13 , 17 ).

Descriptions. Holotype Male. QLM S22518 a: coloration (in alcohol; Fig. 10a ): carapace reddish brown, with short fine brown hair, lateral and posterior margin with curved brown bristles. Abdomen hirsute with pale brown hair. Palp and legs paler than carapace. Body length: with chelicerae 15.68; without chelicerae 13.60. Carapace ( Fig. 11a ): 1.19 length to width (7.04 length, 5.92 width). Ocular tubercle: wider than long; width to length 1.80 (0.8 length, 144 width); clypeus absent. Eyes group: in rectangular shape on ocular tubercle; anterior eye row slightly procurved; posterior eye row recurved. AME> ALE> PLE> PME. Fovea straight, 3.92 apart to ocular tubercle; fovea width indistinct to ocular tubercle width. Labium ( Fig. 10b , 11a ): sub-rectangular; 1.55 width to length (0.88 length, 1.36 width); ventrally with black bristle and patch of cuspules on 1/3 of anterior part (ca. 100; <1 diameter apart); anterior margin concave with row of setae. Labiosternal groove distinct. Sternum ( Fig. 10b ): ventrally with black bristles on peripheral area and fine hair uniformly; 1.05 length to width (3.20 length, 3.04 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 slender than other pairs, ≥ 1 diameter from sternal margin, opposite coxae III. Maxillae ( Fig. 12 ): ventrally with black bristle and patch of cuspule in proximal anterior corner (ca. 130; 2–3 diameters apart); prolaterally with rows of short stout setae above the suture and long thin setae on the area that lyra should occur, lyra absent. Chelicerae ( Fig. 13 ): prolaterally with 9 promarginal teeth, ca. 40 mesoventral dentricles, intercheliceral peg absent; retrolaterally with rows of pseudostrikers (ca. 30) on ventral margin, lyra absent. Spinnerets: PMS 0.56 length; PLS 3.84 length (1.44+0.88+1.52). Palp and legs: measurements: pedipalp length: 9.36 (3.44+2.08+2.56+1.28), leg I: 21.04 (6.24+3.76+4.88+3.76+2.40), leg II: 17.60 (5.04+2.96+3.84+3.44+2.32), leg III: 15.04 (4.40+2.40+2.64+3.36+2.24), leg IV: 21.76 (6.00+2.88+4.80+5.36); palpal tibia incrassate, tapering distally, with line of glabrous area ventrally along distal half of tibia length; tibial spur entirely absent; paired tarsi claws and palpal claw with two small teeth; third claws on leg III–IV; tarsal weakness present as paler area on prolateral and retrolateral legs II–IV. Scopulae: entire in all legs and palp tarsi and metatarsi I–II; 2/3 from distal metatarsi III; and 1/2 from distal metatarsi IV. Scopulae division: undivided on leg I–II and metatarsi III; clearly divided with rows of setae on tarsi III–IV, undivided but possessed row of setae on metatarsi IV. Spines: absent on metatarsi I; metatarsi II with 2 dV; metatarsi III with 3 dV, and 2 dD and metatarsi IV with 3 dV and 2 dD. Genitalia ( Fig. 14 ): subtegulum distinct; haematodoca well developed; tegulum tapering and partly concave; embolus short, overall tapered and further tapering to the tip; with distinct basal lobe and strong retrolateral keel; embolus tip slightly bent. ( Fig 14b ).

Variation. Unknown

Descriptions. Female. QM S22518 b: coloration (in alcohol; Fig. 10b ): as for male. Carapace reddish brown, with short fine brown hair, lateral and posterior margin with curved brown bristle.Abdomen hirsute with pale brown hair. Palp and legs paler than carapace. Body length 16.00. Carapace ( Fig. 15 ): 1.22 length to width (7.52 length, 6.16 width). Ocular tubercle: wider than long; width to length 1.38 (1.04 length, 1.44 width); clypeus absent. Eyes group: in rectangular shape on ocular tubercle; anterior eye row slightly procurved; posterior eye row recurved. ALE> AME> PLE> PME. Fovea: straight, 4.32 apart to ocular tubercle; fovea width indistinct to ocular tubercle width. Labium ( Figs 15b , 16a ): sub-rectangular; 1.75 width to length (0.96 length, 1.68 width); ventrally with black bristle and patch of cuspules on 1/3 of anterior part (ca. 200; <1 diameter apart); anterior margin with row of setae. Labiosternal groove distinct. Sternum ( Fig. 15b ): ventrally with black bristles and fine hair; 1.00 length to width (3.60 length, 3.60 width). Sigilla: three-pairs; anterior pair indistinct, close to sternal margin, opposite to coxae I; median pair ovoid, <1 diameter from sternal margin, opposite to coxae II; posterior pair ovoid, clearly bigger and slender than other pair, ≥ 1 diameters from sternal margin, opposite to coxae III. Maxillae ( Fig. 16 ): maxillary pro- cess well developed; ventrally with black bristles and patch of cuspules in proximal anterior corner (ca. 120; 2–3 diameters apart); prolaterally with rows of long black setae above suture and on area that lyra should occur, lyra absent. Chelicerae ( Fig. 17 ): prolaterally with 11 promarginal teeth, ca. 40 small mesoventral denticles, intercheliceral pegs absent; retrolaterally with row of striker-like setae (ca. 40) on ventral margin, lyra absent. Spinnerets: PMS 0.80 length; PLS 4.24 length (1.36+1.20+1.68). Palp and legs: measurements: pedipalp length: 19.36 (5.68+3.60+4.24+3.52+2.32), leg I: 19.36 (5.68+3.60+4.24+3.52+3.32), leg II: 16.40 (4.80+3.20+3.36+3.20+1.84), leg III: 13.92 (3.92+2.40+2.40+3.20+2.00), leg IV: 19.12 (4.80+2.64+4.40+4.88+2.40); tibial spur absent in all legs, paired tarsi claws and palpal claw with two small teeth; third claw present only on leg IV; tarsal weakness present as crack on ventral of tarsi IV. Scopulae: entire in legs I–II and palp tarsi and metatarsi I–II; 1/2 from distal metatarsi III; and absenton tarsi III and leg IV (may be an artifact of old collection). Scopula division: undivided on leg II, metatarsi I and III tarsi I and metatarsi I and III), clearly divided with rows of setae on tarsi I. Spines: absent on metatarsi I; metatarsi II with 1 dV; metatarsi III with 3 dV and 2 dL and metatarsi IV with 3 dV. Genitalia ( Fig. 18 ): unilobed but not fused, sclerotized from apex to base, each lobe with tapered base and slightly tapering before widening to tip.

Variation. Unknown

Etymology. .—The new species is dedicated to Dr. Robert J. Raven, the senior curator ( Arachnida) at the Queensland Museum, Australia for his incalculable contribution to spider systematics.

Figures

FIGURE 10. Phlogiellus raveni sp. nov.: Dorsal habitus in alcohol (a) male and (b) female.

FIGURE 11. Phlogiellus raveni sp. nov. (male, holotype): (a) carapace; (b) sternum and mount parts.

FIGURE 12. Phlogiellus raveni sp. nov. (male, holotype): (a) labium and maxillae (ventral view); (b) left maxillae (prolateral view).

FIGURE 13. Phlogiellus raveni sp. nov. (male, holotype): left chelicerae (a) retrolateral view (b) prolateral view; (c) close up of pseudostrikers (arrow); (d) close up of mesoventral dentricles (arrow).

FIGURE 14. Phlogiellus raveni sp. nov. (male, holotype): left pedipalp (a) prolateral view; (b) ventral view; (c) retrolateral view.

FIGURE 15. Phlogiellus raveni sp. nov. (female, allotype): (a) carapace; (b) sternum and mount parts.

FIGURE 16. Phlogiellus raveni sp. nov. (female, allotype): (a) labium and maxillae (ventral view); (b) left maxillae (prolateral view).

FIGURE 17. Phlogiellus raveni sp. nov. (female, allotype): left chelicerae (a) retrolateral view (b) prolateral view; (c) close up of pseudostrikers (arrow); (d) close up of mesoventral dentricles (arrow).

FIGURE 18. Phlogiellus raveni sp. nov. (female, allotype): spermathecae (dorsal view).