Missulena faulderi, Harms, Danilo & Framenau, Volker W., 2013

Harms, Danilo & Framenau, Volker W., 2013, New species of Mouse Spiders (Araneae: Mygalomorphae: Actinopodidae: Missulena) from the Pilbara region, Western Australia, Zootaxa 3637 (5), pp. 521-540: 525-531

publication ID

http://dx.doi.org/10.11646/zootaxa.3637.5.2

publication LSID

lsid:zoobank.org:pub:447D8DF5-F922-4B3A-AC43-A85225E56C57

DOI

http://doi.org/10.5281/zenodo.5659702

persistent identifier

http://treatment.plazi.org/id/D70A3C3C-FFBA-5A62-FF6D-FD88DC4644A4

treatment provided by

Plazi

scientific name

Missulena faulderi
status

sp. nov.

Missulena faulderi   sp. nov.

Figs 2 View FIGURES 2 A – B , 4–7 View FIGURES 4 A − G View FIGURES 5 A − G View FIGURES 6 A − E View FIGURES 7 A − H , 12A, B, C View FIGURES 12 A − F

Type material. AUSTRALIA: Western Australia: holotype male, Jinayri, ca. 60 km NW of Newman, 22 ° 58 ’04”S, 119 ° 16 ’02”E, 1 February 2009, pitfall trap, J. Gollan, N. Sullivan, M. Semeniuk & M. Beatson (WAM T 97017 DNA). Paratypes: 1 male, same data as holotype, except 23 °02’ 27 ”S, 119 ° 16 ’ 47 ”E, 2 February 2009 (WAM T 96133); 1 male, as for holotype, except 23 °02’ 30 ”S, 119 º 16 ’ 40 ”E, 5 February 2009 (WAM T 96132).

Etymology. The specific epithet is a patronym in honour of Richard Faulder for his work on Missulena (Faulder 1995)   .

Diagnosis. Males of M. faulderi   sp. nov. differ from all other Missulena   from Australia by the very long and slightly curved embolus of the male bulb. They differ from other Missulena   , except the most similar species M. rutraspina   , by the presence of a pronounced rastellum, which is developed as a distinct process with three to five large conical spines rather than a series of narrow spines on a process or low mound. Missulena faulderi   sp. nov. males (carapace length <3.5) differ from the males of M. rutraspina   (carapace length> 3.8) by the smaller size, the presence of an interior row of seven to eight fused teeth in the cheliceral furrow (teeth divided in M. rutraspina   ), the shape of the male bulb which has no depressions, and a medially curved embolus (bulb with spiral depression and embolus almost straight in M. rutraspina   , see Faulder 1995). Missulena faulderi   sp. nov. males do not have any red markings on the carapace and chelicerae (as do males of M. occatoria   and M. langlandsi   sp. nov.), do not have rasps on patellae I, II (similar to M. dipsaca   , M. rutraspina   & M. tussulina   ) and IV, and have lateral ridges on the chelicerae. Females of M. faulderi   sp. nov. are unknown.

Description. Adult male, based on holotype WAM T 97017. Medium-sized spider (total length 7.5).

Colour: carapace ( Figs 4 A–C View FIGURES 4 A − G ) dark reddish-brown but distally lighter, margins dark brown; eye region ( Fig. 5 D View FIGURES 5 A − G ) dark brown, anterior median eyes on black tubercle; chelicerae ( Figs 4 B View FIGURES 4 A − G , 5 B, E View FIGURES 5 A − G ) proximally dark brown but distally lighter, fangs ( Figs 5 A, C View FIGURES 5 A − G ) dark brown; abdomen ( Figs 4 A, D View FIGURES 4 A − G ) dark grey with yellow longitudinal streaks and two proximomedial pale patches of two to three individual spots each, mottled with some more spots posteriorly which form oblique lines; sternum ( Fig. 6 A View FIGURES 6 A − E ) yellowish-brown, margins contoured greyish-brown, sigilla orange-brown; labium ( Figs 6 B, D View FIGURES 6 A − E ) and maxillae dark reddish-brown; legs ( Figs 4 A, E, F View FIGURES 4 A − G ) yellowish greybrown, tarsi and metatarsi ventrally yellow; spinnerets ( Fig. 6 C View FIGURES 6 A − E ) pale yellow, spigots white.

Carapace: 3.5 long, 3.9 wide; caput and eye region ( Fig. 4 C View FIGURES 4 A − G ) elevated in lateral view, strongly arched and differentiated from lower carapace; fovea ( Fig. 4 G View FIGURES 4 A − G ) very deep, strongly procurved ( Fig. 4 B View FIGURES 4 A − G ); lower carapace rugose with bands of fine, random fissures centered around fovea ( Fig. 4 B View FIGURES 4 A − G ).

Eyes: OQ 3.4 times wider than long, occupies 0.76 of cephalic width; MOQ 1.42 long; width of anterior eye group 2.3, width of posterior group 1.8, OQ length 0.6; AME on tubercle, 0.6 wide, 0.4 long; AME inter-distance 0.1; AME to ALE 0.35; PLE to ALE 0.4; PME to ALE 0.25; PLE to PME 0.35; eye region ( Fig. 5 D View FIGURES 5 A − G ) with reduced setation but some setae anterior to AME.

Chelicerae: 2.1 long, 1.3 wide; distally broad, diagonal, slightly conical; edges smoothly rounded; with very strong transverse ridges distally over entire length ( Figs 5 B, E View FIGURES 5 A − G ), without setae in area of transverse ridges but with 10 setae along inner margin of chelicera; rastellum ( Figs 5 A, C View FIGURES 5 A − G ) strongly developed, very pronounced, consisting of sclerotised process with four strong conical spines and 20−22 disordered setae ( Figs 5 A, E View FIGURES 5 A − G ), 10 long setae extend forward from anterior margin of each chelicera and cover base of fang, setae largest on latero-ventral side; inner margin of cheliceral furrow with three rows of teeth ( Figs 5 F, G View FIGURES 5 A − G ); prolateral (inner) row with 13 teeth, distal teeth entirely fused and forming blade, all teeth fused at base; intermediate row with four proximal, spaced teeth; retrolateral (outer) row with two proximal, spaced teeth; without basomedial teeth.

Maxillae: 1.6 long; 1.1 wide, almost square ( Fig. 6 E View FIGURES 6 A − E ), 50 pointed cuspules along entire anterior margin, distally pointed and extended onto prominent heel.

Labium: 0.7 long, 0.65 wide; conical, 18 pointed cuspules anteriorly ( Fig. 6 D View FIGURES 6 A − E ); labiosternal suture developed as shallow groove; pair of sigilla near labiosternal suture ( Fig. 6 A View FIGURES 6 A − E ), developed as irregular, poorly-defined patches. Sternum: 2.2 long, 1.8 wide; oval, rebordered ( Fig. 6 A View FIGURES 6 A − E ); with prominent setae, arranged irregular but denser lateral to labium; three pairs of sigilla, anterior pair smallest but well defined, posterior pair roughly oval but not well defined, all sigilla slightly depressed.

Abdomen: 3.7 long, 3.0 wide; roughly oval, without bumps or processes ( Fig. 4 D View FIGURES 4 A − G ); four spinnerets ( Fig. 6 C View FIGURES 6 A − E ), PLS 0.9 long, 0.4 wide; PMS 0.42 long, 0.2 wide.

Pedipalp: length of trochanter 0.7, femur 2.3, patella 1.2, tibia 1.8, tarsus 0.5; entire palp aspinose, tarsus terminally blunt ( Figs 7 B, C View FIGURES 7 A − H ); bulb pyriform and more stout than globular ( Figs 7 A, B, F, H View FIGURES 7 A − H ), two strongly sclerotised sections connected by median haematodocha ( Fig. 12 C View FIGURES 12 A − F ); bulb strongly twisted proventrally ( Figs 7 A, G View FIGURES 7 A − H ); embolus very long, tapering and slightly twisted medially ( Figs 12 A, B, C View FIGURES 12 A − F ); embolus tip simple, triangular, without processes ( Figs 7 D View FIGURES 7 A − H , 12 A, B, C View FIGURES 12 A − F ).

Legs: with less than 150 brown setae over all segments, ventral setae of tibiae and metatarsi generally much longer and thicker than dorsal setae and bent towards exterior, dorsal and lateral setae of tibiae and metatarsi shorter than diameter of respective segment, ventral setae as long or longer than respective leg segment; preening comb absent ( Figs 4 A, E, F View FIGURES 4 A − G ); metatarsi I and II ascopulate, tarsi I ascopulate but with 80 fine ventral setae distally, apical sections with tiny ventral scopula; tarsi II slightly scopulate ventrally across entire length but fine setae of scopula not very dense; tarsi and metatarsi III and IV scopulate ventrally across entire length.

Leg spination: pedipalp aspinose; leg I: tibia rv0, v 12, pv0, d0; metatarsus rv 3, v 17, pv0, d0; tarsus rv 3, v 4, pv 2, d0; leg II: tibia rv0, v 12, pv0, d0; metatarsus rv 4, v 8, pv0, d0; tarsus rv 4, v 4, pv 3, d0; leg III: tibia rv0, v 16, pv 8, d0; metasarsus rv 12, v0, pv 7, d 11; tarsus rv 3, v 3 (apical), pv 3, d 3 (apical); leg IV: tibia rv 13, v0, pv0, d0; metatarus rv 10, v0, pv 2, d0; tarsus rv 12, v 7 (apical), pv 5, d 2 (apical); patellae I, II without rasps and spines, patellae III with 31 rasps in eight oblique rows dorsally, median rows shorter than lateral rows and with less spines ( Fig. 4 E View FIGURES 4 A − G ); patella four with three to four thick, short spines ( Fig. 4 F View FIGURES 4 A − G ) retrolaterally.

Leg measurements: leg formula IV>I>II>III. Leg I: coxa 1.4, trochanter 0.8, femur 2.8, patella 1.4, tibia 2.0, metatarsus 1.8, tarsus 1.1, total = 11.3; tibia width 0.7, leg I index = 3.2. Leg II: coxa 1.3, trochanter 0.9, femur 2.6, patella 1.4, tibia 2.1, metatarsus 1.6, tarsus 1.0, total = 10.9; tibia width 0.8, leg II index = 3.1. Leg III: coxa 1.4, trochanter 0.7, femur 2.3, patella 1.3, tibia 1.4, metatarsus 2.1, tarsus 1.3, total = 10.5; tibia width 0.7, leg III index = 3.0. Leg IV: coxa 1.4, trochanter 0.8, femur 3.4, patella 1.3, tibia 2.2, metatarsus 2.3, tarsus 1.3, total = 12.7; tibia width 0.7, leg IV index = 3.6.

Trichobothria: arranged in discontinuous rows; tibiae I–IV with two rows of 3−4 in dorsolateral position, first row prodorsal and second row retrodorsal, metatarsi with 4 mediodorsal, tarsi I+II with 3, III+IV with 4 mediodorsal.

Tarsal claws: leg I: 5−6 / 2; leg II: 3−4 / 1; leg III: 1−2 / 1; leg IV: 1−2 / 0−1, teeth on claws III −IV very small and broad; claws slightly shorter than spines of tarsi.

Variation in paratypes (N= 2): total length 6.3–7.8; carapace 3.4–3.7 long, 3.9 –4.0 wide; number of labial cuspules 9–13, maxillary cuspules 28–38; labial groove may be inconspicuous; rastellum with 3–5 thick, conical spines.

Distribution. Currently known only from the Jinayri exploration lease (BHP Billiton Iron Ore) in the Pilbara region northeast of Newman ( Fig. 2 B View FIGURES 2 A – B ).

Phenology and habitat preferences. All males were collected in pitfall traps in February, the month of highest annual rainfall in the Pilbara region. The holotype was collected adjacent to a then dry creek bed near Weeli Wolli Creek.