Allochthonius Chamberlin, 1929

Gao, Zhizhong, Zhang, Yanfen & Zhang, Feng, 2016, Two New Species Of Pseudotyrannochthoniidae, Including The First Species Of Pseudotyrannochthonius (Pseudoscorpiones) From China, Acta Zoologica Academiae Scientiarum Hungaricae 62 (2), pp. 117-131 : 123-130

Genus Allochthonius Chamberlin, 1929

Subgenus Allochthonius (Allochthonius) Chamberlin, 1929

BEIEr (1932): 61 – 62, MOrIkAwA (1960): 98, Hu & ZHANG (2011): 2168 – 2169, Hu & ZHANG (2012): 243 – 248, GAO & ZHANG (2013): 107 – 112.

Allochthonius (Allochthonius) fanjingshan sp. n.

(Figs 4–7)

Typematerial. Holotypemale (Ps.- MHBU-GZ14101202 ): China, GuizhouProvince , Ji- angkouCounty, FanjingshanNationalNatureReserve [27°54.486 ′ N, 108°41.843 ′ E], alt. 2210 m, 12 October 2014, ZhizhongGaoleg. Paratypes: twofemales (Ps.- MHBU-GZ14101203–04 ), samedataasholotype .

Etymology. Thespecificnameisanouninappositiontakenfromtothetypelocality.

Diagnosis. Thisnewspeciesdiffersfromallotherspeciesofthegenusby thefollowingcombinationofcharacters: epistomeabsent; palmofchelicera withfinegranulations; coxalbladesallsituatedonacommontubercle; sternitesIII–VIwithpalecolorarea; malepedipalpalfemur 5.32 (female 5.52–5.95) timeslongerthanbroad; malechela 5.03 (female 4.00–4.15) timeslongerthan broad. Chaetotaxyofcarapace: 8–6–6–2–4, 26.

Fig. 4. Allochthonius (Allochthonius) fanjingshan sp. n., habitus: a = dorsalviewofholotype; b = dorsalviewoffemaleparatype (Ps.-MHBU-GZ 14101203).

Fig. 5. Allochthonius (Allochthonius) fanjingshan sp. n., holotypeexceptb: a = carapace (dorsalview); b = carapaceoffemaleparatype (dorsalview); c = coxalbladesonlegI (ventral view); d = rallum; e = leftpalp (minuschela, dorsalview); f = leftchelicerae (lateralview); g = leftchela (dorsalview); h = legIV (lateralview); i = legI (lateralview). Scalebars: 0.25

mm (a–b, e–i); 0.20 mm (c–d).

Thisnewspeciesismostsimilarto A. (A.) fuscus fromChina; aftercomparingtheholotypeof A. (A.) fanjingshan , wefoundthecolorofcarapaceand tergitesaredistinctlydarkerthethatof A. (A.) fuscus whicharemostlyyellowish; thecarapacalchaetotaxyarealsodifferent (8–6–6–2–4, 26 vs 8–4–4–2–4,22); and A. (A.) fanjingshan hasalargerbodylength (2.41 vs 2.25). Thisnewspecies isalsosimilarto A. (A.) sichuanensis whichisalsodistributedinsouthwest China, butcanbedistinguishedfromthelatterbythenumberofcoxalblades Fig. 6. Allochthonius (Allochthonius) fanjingshan sp. n.: a = leftchela; b = carapaceandcheli- cerae, positionoflyrifissuresindicatedbyblackbars; c = genitalareaofholotype, positionof lyrifissuresindicatedbyblackbars; d = genitalareaofparatype (Ps.-MHBU-GZ 14101203). presentoncoxaI, A. (A.) fuscus have 11 while A. (A.) sichuanensis onlyhave eight; chelalfemurof A. (A.) fuscus issomewhatstouterthanthatof A. (A.) sichuanensis (5.32 vs 5.6).

Description. Male. Carapace, abdomen, chelalhandslightlyblack, otherpartspaleyellow.

Carapace (Fig. 5a; Fig. 6b) subquadrate, somewhatshorterthanbroad (0.84 times), scarcelyconstrictedposteriorly; anteriormarginwithoutdenticulate; bothpairsofeyes well-developedandlarge, withthelensvaulted; eyesalmost 1/2 diameterfromeachother, anteriorpairofeyesonediameterfromanteriormarginofcarapace; epistomeabsent, space betweenmediansetaestraightorslightlyrecurved; chaetotaxy: 8–6–6–2–4,26; withtwo pairsoflyrifissures, seeFig. 6b.

Coxalarea: tipofmanducatoryprocesswith 2 setae, onelongandtheothershort. Bisetoseintercoxaltuberclepresent; coxalblades (Fig. 5c) onlypresentoncoxaI, consisting ofatubercleexpandedterminallyintoacharacteristic “spray” or “fan” ofabout 9 elevate processeswhichextendapically; setaeP 3, I 4, II 5, III 6, IV 7.

Chelicera (Fig. 5f): almostaslongascarapace; palmofcheliceraewith 6 simplesetae, bs short, agalealsetalocatedonthemiddleofthemovablefinger; bothlateralsidesofpalm withfinegranulations. Fixedfingerwith 4–5 conspicuousteeth, onelyrifissuresattheba- salpart; movablefingerwith 20 conspicuousteeth, thebasaloneslargerthantheothers; Serrulaexteriorwith 17–18 lamellae; serrulainteriorwith 16–17 lamellae. Rallum (Fig. 5d) intworowsandcomposedof 11 bladeswithfinebarbulesexcepttheposteriorone, which isshorterthantheothers.

Pedipalp (Fig. 5g): chelalhandrobust, chelalfingerstraightindorsalview; movable fingershorterthanthefixedfinger. Fixedfingerwith 15–16 acuteteeth, whichthemiddle Fig. 7. Allochthonius (Allochthonius) fanjingshan sp. n., holotype: a = sternites; b = leg I; c. leg IV. oneslargerthanthatinbothends; movablefingerwith 20–21 acuteteeth, atuberclebe- tweenthetenthandeleventh. Trichobothrialpattern (Fig. 5e; Fig. 6a) typical: fixedfinger witheightandmovablefingerwithfour; trichobothrium sb indistinctlynearer b than st, estatlevelof t, line ib-isb-eb-esb-ist circledclusteredatthebaseoffixedfinger; inaddition, twospecialsensoryhairs (XS) present, whichnearthetipoffixedfinger; sensillaabsent.

Abdomenovate, sternitesIII–VIwithpalecolorarea (Fig. 7a); tergitesandsternites with numerous setae,tergal chaetotaxy I–XII: 4: 6: 8: 8: 11: 11: 12: 14: 10: 10: TT: 0; anteriorgenitaloperculumwith 8 glandularsetae, genitalopeningpit-likeinthebasalhalf, eachsidewith 12 marginalsetae, 20 intotal; sternalchaetotaxyIII–X: 17: 17: 16: 14: 14: 12: 11: 8; twolyrifissurespresent, seeFig. 6c.

Legs (Fig. 5h–I; Fig. 7b–c) typicaloffamily. LegIandIV, trochanterandfemurwith squamoussculpture. LegIVwithalongtactilesetaontarsus (TS = 0.24).

Briefdescriptionoffemaleparatypes. Generallysameastheholotype, anteriormarginofcarapace (Fig. 5b) withmoresetae (10–11); bodylengthalittlelargerthanthemale; moresetaepresentinanteriormarginofcarapace; chaetotaxy: ((10–11)–6–6–2–4,27).

Tergal chaetotaxy I–XII: 4: 6–7: 8–9: 11: 11: 11–13: 11–13: 13–14: 10–11: 8–9: TT: 0; anteriorgenitaloperculumwith 12 setae, posteriormarginwith 20 marginalsetae, 32 in total; sternal chaetotaxy III–X: 17: 17: 16–18: 16: 15: 12–14: 10–11: 10.

Measurements (length/breadthordepthinmm, ratiosinparentheses). Male. Body length 2.41. Carapace 0.49 × 0.58 (0.84). Palpaltrochanter 0.26 × 0.17 (1.53), femur 1.01 × 0.19 (5.32), patella 0.37 × 0.15 (2.47), chela 1.46 × 0.29 (5.03), palm 0.54 × 0.29 (1.86), movable finger length 0.88 (1.63 × palm). Leg I trochanter 0.21 × 0.17 (1.24), femur 0.57 × 0.10 (5.70), patella 0.32 × 0.10 (3.20), tibia 0.31 × 0.05–0.08 (3.88), tarsus 0.58 × 0.06 (9.67); leg IV tro- chanter 0.31 × 0.19 (1.63), femur+patella 0.87 × 0.25 (3.48), tibia 0.62 × 0.11 (5.64), metatarsus 0.30 × 0.08 (3.75), tarsus 0.58 × 0.07 (8.29).

Female (paratypes). Body length 2.32–2.43. Carapace 0.54–0.57 × 0.72 (0.75–0.79). Palpal trochanter 0.29 × 0.19–0.21 (1.38–1.53), femur 1.13–1.16 × 0.19–0.21 (5.52–5.95), patella 0.43–0.45 × 0.20 (2.15–2.25), chela 1.62–1.68 × 0.39–0.42 (4.00–4.15), palm 0.57–0.60 × 0.39–0.42 (1.43–1.46), movable finger length 1.02 (1.70–1.79 × palm). Leg I trochanter 0.23– 0.25 × 0.18–0.19 (1.28–1.32), femur 0.59–0.61 × 0.11–0.12 (4.92–5.55), patella 0.35 × 0.10–0.11 (3.18–3.50), tibia 0.32–0.34 × 0.08–0.09 (3.78–4.00), tarsus 0.62 × 0.06–0.07 (8.86–10.33); leg IV trochanter 0.21–0.26 × 0.19–0.20 (1.11–1.30), femur+patella 0.92–0.94 × 0.25 (3.68–3.76), tibia 0.67–0.68 × 0.13–0.14 (4.79–5.23), metatarsus 0.32–0.33 × 0.08–0.09 (3.67–4.00), tarsus 0.64–0.66 × 0.07 (9.14–9.43).

Distribution. China (Guizhou).

Habitat and ecology. Same as that of Pseudotyrannochthonius cheni sp. n.