Parobisium yuantongi, Feng & Wynne & Zhang, 2019
publication ID |
https://doi.org/ 10.11646/zootaxa.4661.1.7 |
publication LSID |
lsid:zoobank.org:pub:1239FB1C-0E57-4493-8236-079ADAD99918 |
persistent identifier |
https://treatment.plazi.org/id/F66CB38A-0F96-489D-AAD1-D5D517F818E1 |
taxon LSID |
lsid:zoobank.org:act:F66CB38A-0F96-489D-AAD1-D5D517F818E1 |
treatment provided by |
Plazi |
scientific name |
Parobisium yuantongi |
status |
sp. nov. |
Parobisium yuantongi View in CoL sp. n.
( Figs 6–8 View FIGURE 6 View FIGURE 7 View FIGURE 8 )
Type material. Holotype male (Ps.- MHBU-BJ 18061010 ): China, Beijing City, Fangshan District, Shijiaying Town , Shenxian cave , [39.867793°N, 115.704571°E], estimated cave deep zone, 603 m elevation, 10 June 2018, Zegang Feng leg. GoogleMaps
Diagnosis. Troglomorphic habitus; carapace without eyes or eyespots; epistome triangular, with rounded top; carapace with 6 setae on posterior margin; pedipalp slender and with granulation present on femur, inside lateral of patella and chelal hand, both chelal fingers with 115–118 teeth; femur 6.75 times (length 1.62), patella 5.70 times (length 1.54) longer than broad, pedicel about half of total length of patella. Hand with pedicel 3.00 times (length 1.05), chela with pedicel 8.00 times (length 2.80) longer than broad, finger 1.69 times longer than hand with pedicel. Chelicera: rallum with 8 pinnate setae, distal one with an expanded base.
Description. Male ( Fig. 6 View FIGURE 6 ). Carapace, chelicerae and pedipalps light yellow brown; abdomen and legs yellow- ish.
Carapace ( Figs 7A View FIGURE 7 , 8A View FIGURE 8 ): Smooth, 1.46 times longer than broad, with a total of 22 setae, including 4 on anterior margin and 6 on posterior margin; lacks eyes or eyespots; epistome small, triangular, with rounded top.
Chelicera ( Figs 7B View FIGURE 7 , 8B View FIGURE 8 ): Hand with 6 setae, movable finger with one submedial seta; fixed finger with 14 teeth; movable finger with 11 teeth; serrula exterior with 24–26 lamellae; serrula interior with 26–28 lamellae. Galea ( Fig. 8D View FIGURE 8 ) replaced by a small rounded transparent spinneret. Rallum ( Fig. 8C View FIGURE 8 ) with 8 pinnate setae, distal one separated and with expanded base, proximal one short.
Pedipalps ( Figs 7 View FIGURE 7 C–D, 8G–H): Apex of coxa rounded, with 4–5 setae on each side. Pedipalp slender and with granulation present on femur, inside lateral of patella and chelal hand. Trochanter 3.33, femur 6.75, patella 5.70, chela (with pedicel) 8.00, chela (without pedicel) 7.37 times longer than wide, movable finger 2.19 times longer than hand (without pedicel). Fixed chelal finger with 8 trichobothria, movable finger with 4, eb and esb on lateral margin of hand; ib, ist, and isb closely grouped at the base of the fixed finger; est situated at the subdistal of finger; est, et and it grouped together near fingertip; b situated at base of movable finger, sb situated at one-third base of the finger, st and t at one-third distal of movable finger, st nearer to t than to sb, the latter distinctly nearer to b than to st, the distance between b and sb longer than that between t and st. Venom apparatus present only in fixed chelal finger, venom duct short. Fixed chelal finger with 116 teeth, movable finger with 118 teeth.
Abdomen: Pleural membrane granulated. Tergal chaetotaxy (I–XI): 6: 9: 11: 11: 11: 12: 11: 11: 11: 10: 7; sternal chaetotaxy (IV–XI): 16: 14: 14: 13: 14: 12: 11: 3; stigmata with 3–5 setae around; anal cone with 2 dorsal and 2 ventral setae. Male genital area ( Fig. 8F View FIGURE 8 ): sternite III with 11 setae on the posterior margin; with 6 setae around the anteromedian groove; sternite III with a row of 11 setae on the posterior margin.
Legs: Leg I ( Figs 7E View FIGURE 7 , 8I View FIGURE 8 ) and Leg IV ( Figs 7F View FIGURE 7 , 8J View FIGURE 8 ) typical. Tibia IV with one submedial tactile seta (TS = 0.50), basitarsus IV with one basal tactile seta (TS = 0.11), telotarsus IV with one tactile seta (TS = 0.51). Subterminal tarsal seta ( Fig. 8E View FIGURE 8 ) bifurcate; arolium not divided, shorter than the slender and simple claws.
Measurements: (length/breadth or depth in mm; ratios for most characters in parentheses). Male. Body length 2.98. Carapace 1.46 (1.04/0.71). Pedipalpal trochanter 3.33 (0.80/0.24), femur 6.75 (1.62/0.24), patella 5.70 (1.54/0.27), chela (with pedicel) 8.00 (2.80/0.35), chela (without pedicel) 7.37 (2.58/0.35), hand length (without pedicel) 0.81, movable finger length 1.77 (2.19 times longer than hand without pedicel). Leg I: trochanter 1.42 (0.27/0.19), femur 5.80 (0.87/0.15), patella 4.15 (0.75/0.10), tibia 7.50 (0.75/0.10), basitarsus 5.00 (0.40/0.08), telotarsus 6.86 (0.48/0.07). Leg IV: trochanter 2.67 (0.46/0.18), femur + patella 5.07 (1.37/0.27), tibia 8.60 (1.29/0.15), basitarsus 4.00 (0.44/0.11), telotarsus 6.78 (0.61/0.09).
Distribution. This species is known only from the type locality.
Etymology. The species name, yuantongi , was derived from the Latinized Mandarin phrase for “shaped like a cylinder” or “cylindrical.” Yuán tǒng (Oifi) refers to the shape of chelal hand.
Remarks. The new species resembles P. longipalpus Hong, 1996 but is distinguished by the lack of eyes or eyespots ( P. longipalpus has four conspicuous eyes), the slender pedipalpal femur 6.75 longer than broad (3.6–4.9 times in P. longipalpus , patella 5.70 times longer than broad (2.9–3.3 times in P. longipalpus ).
P. yuantongi View in CoL sp. n. also resembles P. robustiellum Hong, 1996 View in CoL , but it can be differentiated from the latter by lack of eyes or eyespots ( P. robustiellum View in CoL has four eyes), chelal fingers with 115–118 teeth (about 51–66 teeth in P. robustiellum View in CoL ); the slender pedipalpal femur 6.75 longer than broad (2.5–3.6 times in P. robustiellum View in CoL ), patella 5.70 times longer than broad (2.7–3.4 times in P. robustiellum View in CoL ).
P. yuantongi View in CoL sp. n. can be easily distinguished from P. anagamidense ( Morikawa, 1957) View in CoL by the following characters: carapace without eyes/eyespots ( P. anagamidense ( Morikawa, 1957) View in CoL , epistome triangular, with rounded top (absent in P. anagamidense View in CoL ); pedipalpal femur 6.75 longer than broad (4.0–4.2 times in P. anagamidense ( Morikawa, 1957) View in CoL patella 5.70 longer than broad (2.9 times in P. anagamidense ( Morikawa, 1957) View in CoL .
P. yuantongi View in CoL sp. n. differs from P. magangensis View in CoL sp. n. by the pedipalpal morphology and size: pedipalp with granulation present on femur, inside lateral of patella and chelal hand (smooth in P. magangensis View in CoL sp. n.), pedipalpal femur 6.75 longer than broad (8.91–8.97 times in P. magangensis View in CoL sp. n.), patella 5.70 longer than broad (7.64–7.84 times in P. magangensis View in CoL sp. n.).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Genus |
Parobisium yuantongi
Feng, Zegang, Wynne, J. Judson & Zhang, Feng 2019 |
P. yuantongi
Feng & Wynne & Zhang 2019 |
P. yuantongi
Feng & Wynne & Zhang 2019 |
P. yuantongi
Feng & Wynne & Zhang 2019 |
P. magangensis
Feng & Wynne & Zhang 2019 |
P. magangensis
Feng & Wynne & Zhang 2019 |
P. magangensis
Feng & Wynne & Zhang 2019 |
P. magangensis
Feng & Wynne & Zhang 2019 |
P. robustiellum
Hong 1996 |
P. robustiellum
Hong 1996 |
P. robustiellum
Hong 1996 |
P. robustiellum
Hong 1996 |
P. robustiellum
Hong 1996 |
P. anagamidense (
Morikawa 1957 |
P. anagamidense (
Morikawa 1957 |
P. anagamidense (
Morikawa 1957 |
P. anagamidense (
Morikawa 1957 |