Karschia (Karschia) shannan, Fan & Zhang & Zhang, 2024
|
publication ID |
https://doi.org/ 10.3897/BDJ.12.e129933 |
|
publication LSID |
lsid:zoobank.org:pub:8F5C936C-FF8C-4B5B-97C5-26091D4F0987 |
|
persistent identifier |
https://treatment.plazi.org/id/86A99BAB-8D68-4E65-8AEA-EF0237744532 |
|
taxon LSID |
lsid:zoobank.org:act:86A99BAB-8D68-4E65-8AEA-EF0237744532 |
|
treatment provided by |
|
|
scientific name |
Karschia (Karschia) shannan |
| status |
sp. nov. |
Karschia (Karschia) shannan sp. nov.
Materials
Type status: Holotype. Occurrence: recordedBy: Xiangbo Guo; sex: male; lifeStage: adult; occurrenceID: 1C596901-1780-5A92-8615-CB5AC70B46E9; Taxon: scientificName: Karschia (Karschia) shannan ; Location: country: China; stateProvince: Xizang Autonomous Region; county: Gongga; municipality: Shannan; locality: Jiangtang Town ; verbatimElevation: 3560 m; verbatimCoordinates: 29.3213 ° N, 90.6874 ° E; Identification: identifiedBy: Wenlong Fan; Event: year: 2023; month: July; day: 6; Record Level: language: English; institutionID: the Museum of Hebei University (MHBU); institutionCode: MHBU-Sol-XZ 2023070601 GoogleMaps
Type status: Paratype. Occurrence: recordedBy: Xiangbo Guo; sex: 1 male, 1 female; lifeStage: adult; occurrenceID: F48EB559-A918-5B3B-933C-9E7D9F1C91AC; Taxon: scientificName: Karschia (Karschia) shannan ; Location: country: China; stateProvince: Xiang Autonomous Region; county: Gongga; municipality: Shannan; locality: Jiangtang Town ; verbatimElevation: 3560 m; verbatimCoordinates: 29.3213 ° N, 90.6874 ° E; Identification: identifiedBy: Wenlong Fan; Event: year: 2023; month: July; day: 6; Record Level: language: English; institutionID: the Museum of Hebei University (MHBU); institutionCode: 1 male MHBU-Sol-XZ 2023070602 1 female MHBU-Sol-XZ 2023070603 GoogleMaps
Description
Adult male (holotype) (Fig. 1 View Figure 1 A, B, Figs 2 View Figure 2 , 3 View Figure 3 , Fig. 10 View Figure 10 A, B and E).
Measurements. Total body length 19.16, CH 1.84, CL 5.67, CW 1.72, PL 2.67, PW 3.31, A / CP 6.84, CL / CH 3.08. Pedipalp 19.42 (4.21, 6.80, 4.28, 1.14), leg Ⅰ 14.45 (2.97, 4.17, 2.48, 1.20), leg Ⅱ 12.74 (2.81, 3.25, 1.98, 0.98), leg Ⅲ 16.06 (3.51 4.34, 2.35, 0.96), leg Ⅳ 23.06 (4.33, 7.04, 3.63, 1.72).
Coloration. General body colouration pale yellowish with opisthosoma slightly darker; a chestnut pigmentation may be present on distal areas of the propeltidium, on the pedipalps (from the femur to the tarsus) and dorsal surface of the legs (from the femur to the tarsus) (Fig. 1 View Figure 1 A and B). Cheliceral manus predominantly yellowish, with some black areas and, in retrolateral view, with three black longitudinal stripes; cheliceral fingers with apices burnt umber (Fig. 2 View Figure 2 A and B). Opisthosomal tergites black and the side of sternites black (Fig. 1 View Figure 1 A and B).
Prosoma. Propeltidium wider than long (i. e. ratio of PL / PH 0.81), with very thin, filiform hair-like setae and some bifurcated tip setae of different sizes perpendicular to the surface of the propeltidium (Fig. 2 View Figure 2 D). Anterior arci with four spiniform setae of different sizes on each side of ocular tubercle; posterior arci bears a row of 12 longer, thin, filiform setae (partial shedding) (Fig. 2 View Figure 2 D). Ocular tubercle with four anterior medial spiniform setae, one central medial spiniform seta and two posterior medial spiniform setae (Fig. 2 View Figure 2 D). Lateral lobes partially fused to the propeltidium and each lobe with one spiniform seta (Fig. 2 View Figure 2 D). Mesopeltidium and metapeltidium wider than long; mesopeltidium rhomboidal; metapeltidium rectangular.
Cheliceral dentition and processes. Fixed finger with median teeth series comprising three primary teeth ( FP, FM and FD), graded as FD ﹤ FP ﹤ FM, plus two secondary FSM teeth and two secondary FSD teeth; profondal teeth series with four teeth (a very reduced PFM, a tiny PFP, two tiny PFSP) (not annotated on Figs.); retrofondal teeth series with four teeth ( RFA, RFM, RFP, RFSP); mucron with a small dorsal crest and apex (FT tooth) curved and hook-shaped (Fig. 2 View Figure 2 A, B, Fig. 3 View Figure 3 A and B). Movable finger with median teeth series comprising two primary teeth ( MM and MP), plus two secondary MSM and three MSP teeth; mucron with a centrally depressed prolateral flange (Fig. 2 View Figure 2 A, B, Fig. 3 View Figure 3 A and B).
Cheliceral setose areas and stridulatory plate. Retrolateral and dorsal surface of the manus with large bifurcated tip setae and short simple tip bristle-like setae (rlm series); retrolateral and dorsal surfaces of the fixed finger with simple tip setae of different sizes (rlf series) (Fig. 2 View Figure 2 A and Fig. 3 View Figure 3 A); prolateral surface with an array of setal types, as follows: proventral distal setae (pvd) consisting of two rows of plumose setae, the ventral-most reaching the distal PFSP tooth and the dorsal-most reaching the prolateral interdigital condyle (pic); two fcp (i. e. modified pvd); proventral subdistal setae (pvsd comb) forming a single row with about 13–15 spindly setae; the promedial setae (pm) series made up of thin, barbed, simple tipped bristle-like setae; the proximal prodorsal area is covered with some long, simple tipped, non-barbed bristle-like setae (pdp); stridulatory apparatus with 4 well-developed ridges occupying the anterior ventral region of the stridulatory plate (Fig. 2 View Figure 2 B and Fig. 3 View Figure 3 B). Distal limit of the prolateral setose area of the movable finger reaching the MSM tooth; movable finger prodorsal (mpd) setal series consisting of plumose setae arranged in a rather staggered row, adjacent to abundant non-plumose setae of the movable finger promedial (mpm) and proventral (mpv) setal series (Fig. 2 View Figure 2 B and Fig. 3 View Figure 3 B).
Cheliceral flagellar complex. Of the composite type, sessile, without fringe, but with a very small lateral apophysis (Fig. 2 View Figure 2 C and Fig. 3 View Figure 3 E). Flagellum rotatable, long, rolled and structure immovably attached prodorsally to the fixed finger (Fig. 2 View Figure 2 B and Fig. 3 View Figure 3 B). Two medium-length flagellar complex plumose (fcp) setae located ventrally to the flagellum and two swollen-based flagellar complex spiniform (fcs) setae arising dorsoproximally to the flagellar attachment point (Fig. 2 View Figure 2 B, C, Fig. 3 View Figure 3 B and E).
Opisthosoma. Entire surface covered with almost adpressed fine setae and numerous long, curved, bifurcate setae and tergites with abundant setae. Sternite Ⅲ with two posterior paramedian groups of needle-like ctenidia, being gradually larger towards the posterior margin (Fig. 2 View Figure 2 E and Fig. 3 View Figure 3 H); sternite Ⅳ with a row of 13 short and thick columnar ctenidia (Fig. 2 View Figure 2 F and Fig. 3 View Figure 3 I).
Pedipalps. All segment covered with short fine setae and long, thick setae. Tarsus ventrally with nine short strong spines without symmetrical arrangement; metatarsus with seven ventral spines, 2 / 1 / 2 / 1 / 1 pattern and with densely packed papillae (Fig. 10 View Figure 10 A and B).
Legs. Totally covered with long, thick setae and short setae. Leg Ⅰ spineless with two small claws. Tibiae Ⅱ, Ⅲ and Ⅳ with a pair of distal spiniform setae ventrally, tibiae Ⅱ and Ⅲ each with one distal spiniform seta dorsally. Metatarsi Ⅱ and Ⅲ with a series of three dorsal spiniform setae, a pair of distal spiniform setae ventrally and some paired short, thick, spiniform setae over their entire ventral surface, metatarsus Ⅳ also with these paired spiniform setae over its entire ventral surface and two distal spiniform setae ventrally. Additionally, ventral coxae of leg Ⅲ with special tubular setae (Fig. 10 View Figure 10 E): which are absent in other congeners, instead with only fine and bifurcate setae (e. g. Fig. 10 View Figure 10 F).
Adult female (paratype female) (Fig. 1 View Figure 1 C, D, Figs 3 View Figure 3 , 4 View Figure 4 ). Mostly same as males, except where noted.
Measurements. Total body length 18.02, CH 2.36, CL 6.51, CW 2.01, PL 2.65, PW 4.36, A / CP 5.28, CL / CH 2.76. Pedipalp 15.62 (3.01, 4.74, 3.64, 1.39), leg Ⅰ 11.03 (2.41, 3.42, 2.03, 0.89), leg Ⅱ 9.37 (1.60, 2.59, 1.09, 0.93), leg Ⅲ 12.94 (2.79, 3.12, 1.73, 1.13), leg Ⅳ 21.74 (4.56, 6.09, 3.65, 1.53).
Coloration. General body colouration as the male (Fig. 1 View Figure 1 C and D).
Cheliceral dentition and processes. Fixed finger with median teeth series comprising three well-developed primary teeth ( FP, FM and FD), FD tooth smaller, while FM and FP similarly sized, plus two secondary FSD and two FSM teeth, all secondary teeth smaller than primary teeth, distal-most of each pair smallest; retrofondal teeth series uninterrupted with five teeth ( RFSP, RFP, RFM, two RFA); profondal teeth series with five teeth (three PFSP, PFP, PFM) (Fig. 3 View Figure 3 C, D, Fig. 4 View Figure 4 A, B and C). Movable finger with median teeth series comprising two primary teeth ( MM and MP), both similar in size, plus four secondary MST, two secondary MSM and three secondary MSP teeth (Fig. 3 View Figure 3 C, D, Fig. 4 View Figure 4 A, B and D).
Opisthosoma. Genital operculum typical triangular-shaped and with no clear demarcation between the plates; the rear edge of the genital sternite not chitinised and without clear opening (Fig. 3 View Figure 3 F and Fig. 4 View Figure 4 F). Sternite Ⅲ without ctenidia; only sternite Ⅳ with a row of 16 long and needle-like ctenidia, extending across the entirety of the adjacent sternite, reaching its posteror border. (Fig. 3 View Figure 3 G and Fig. 4 View Figure 4 G).
Pedipalps. Tarsus and metatarsus without spines and papillae.
Legs. Coxae of leg Ⅲ without special tubular setae.
Diagnosis
Karschia shannan sp. nov. differs in the male from all Karschia species by the ventral coxae of leg Ⅲ with special tubular setae (Fig. 10 View Figure 10 E). The new species can be further diagnosed by their pedipalpal metatarsi with densely packed papillae (Fig. 10 View Figure 10 B), the apex of their cheliceral fixed finger (FT) tapering (Fig. 2 View Figure 2 B and Fig. 3 View Figure 3 B), the reduced number of ctenidia on sternite Ⅳ - only with 13 short and thick columnar ctenidia (Fig. 2 View Figure 2 F and Fig. 3 View Figure 3 I) and flagellum proximally with a small lateral apophysis; flagellar complex plumose setae (fcp) medium-length (Fig. 2 View Figure 2 B, C, Fig. 3 View Figure 3 B and E). Females can diagnosed by the genital operculum, which, although typically triangular-shaped, has no clear demarcation between the genital plates, while the genital opening is not visible between, nor distal to the genital plates (Fig. 4 View Figure 4 F and Fig. 3 View Figure 3 F). Otherwise, females have long (i. e. reaching the posterior border of the adjacent sternite) and needle-like ctenidia on sternite Ⅳ (Fig. 4 View Figure 4 G and Fig. 3 View Figure 3 G).
Etymology
Noun in apposition, taken from Shannan City where this type materials of the new species were collected.
Distribution
China (Xizang) (Fig. 5 View Figure 5 ).
| PL |
Západoceské muzeum v Plzni |
| PW |
Paleontological Collections |
| FM |
Department of Nature, Fujian Province Museum |
| RFA |
Universidade Federal do Rio de Janeiro |
| MM |
University of Montpellier |
| MP |
Mohonk Preserve, Inc. |
| MSM |
Marine Science Museum, Tokai Univ. |
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.