Balkanodesminus serbicus gen. nov. et, 2022
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publication ID |
https://dx.doi.org/10.3897/zookeys.1097.83916 |
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publication LSID |
lsid:zoobank.org:pub:66F17436-DF36-4FFD-B2D3-021F14D40D62 |
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persistent identifier |
https://treatment.plazi.org/id/2684D82A-21C8-4235-8B2C-39886C7440B1 |
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taxon LSID |
lsid:zoobank.org:act:2684D82A-21C8-4235-8B2C-39886C7440B1 |
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treatment provided by |
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scientific name |
Balkanodesminus serbicus gen. nov. et |
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sp. nov. |
Balkanodesminus serbicus gen. nov. et sp. nov.
Figs 10 View Figure 10 , 11 View Figure 11 , 12 View Figure 12 , 13 View Figure 13 , 17J View Figure 17 , 18 View Figure 18
Diagnosis.
Differs from Balkanodesminus dentatoides gen. nov. et sp. nov. and B. dentatus gen. nov., comb. nov. by the presence of longer (vs. shorter) metatergal setae and their smaller (vs. greater) number of rows, as well as by the presence of more simplified gonopods, with uniramous (vs. biramous) distal solenomeral process and smaller and smooth (vs. larger and denticulated) lamella of solenophore. From B. bulgaricus gen. nov., comb. nov., with which it shares similar habitus and similar gonopods, it differs by the presence of smaller (vs. larger) lamella of solenophore, more robust and sigmoid (vs. slender, almost straight) distal projection of solenophore, distal projection with (vs. without) basal lobe, and more robust (vs. slenderer) solenomere, exceeding the distal solenomeral process by ¼ (vs. ½) of its length.
Name.
The specific name is an adjective derived from the type locality.
Material examined.
Holotype ♂ (NHMW MY10262), Serbia, Niš, Mt. Kalafat, village of Cerje, Cerjanska Cave (= Provalija Cave ), 29.X.2017, leg. D. Antić.
Paratypes. 1 ♂ (NHMW MY10263), 1 ♀ (used for SEM, NHMW MY10264), 1 ♀, 7 juveniles (NHMW MY10265), same data as for holotype .
Description.
Number of body rings and measurements: Body with 19 rings (including telson) in adults, moniliform (Fig. 10 View Figure 10 ). Holotype male and paratype male 4.8 mm and 4.7 mm long, respectively; width of midbody pro- and metazonae 0.30 mm and 0.45 mm, respectively. Paratype females 5.0 mm and 5.2 mm long, width of midbody pro- and metazonae 0.35 mm and 0.50 mm, respectively.
Coloration: Entirely pallid, slightly translucent (Fig. 10 View Figure 10 ).
Head: Broader than collum, setose; epicranial suture poorly developed; isthmus between antennae ≈ 1.7 × broader than diameter of antennal socket (Fig. 11A, B View Figure 11 ). Labrum with three labral teeth, and with 3+3 labral and five supralabral setae (Fig. 11A View Figure 11 ). Gnathochilarium without peculiarities. Antennae rather short, clavate (Fig. 11 View Figure 11 ). Antennomere length 6> 2 = 3 = 4> 5> 7 = 1. Antennae 0.7 mm long in the holotype male; length/breadth ratios of antennomeres 1-7: 1 (1), 2 (2), 3 (2), 4 (2), 5 (1), 6 (1.5) and 7 (1). Antennomere 6 with four sensilla trichoidea and with strongly developed disto-dorsal pit with numerous long sensilla basiconica partially exposed outside the pit (Fig. 11E, F View Figure 11 ). Antennomere 7 with one sensillum trichodeum and a small bulge with three sensilla basiconica spiniformia (Fig. 11E View Figure 11 ). Four apical cones (Fig. 11C View Figure 11 ).
Collum: Semi-circular, with one or two lateral incisions and ≈ 5 irregular rows of relatively long and trichoid setae.
Body rings: Tegument shining, texture alveolate, reticulate and scaly. Setae relatively long and trichoid, originating from small tubercules (Figs 10B View Figure 10 , 12 View Figure 12 ). Posteriormost tubercules mostly with a small thorn (Fig. 12A, E View Figure 12 ). Rings 2-4 with three mostly regular rows of setae, one anterior and two posterior (Fig. 10B View Figure 10 ). Rings 5-18 with ≈ 4-6 irregular rows of setae (Figs 10B View Figure 10 , 12 View Figure 12 ). Paraterga serrated, with four or five teeth (Fig. 12A, D, E View Figure 12 ). Pore formula normal: 5, 7, 9, 10, 12, 13, 15-18. Poriferous metazonae with an enlarged posterolateral cone bearing an ozopore and three medium-sized setae (Fig. 12C View Figure 12 ). Epiproct blunt, directed slightly ventrad (Fig. 12G, H View Figure 12 ). Paraprocts semi-spherical, each with 2 long setae originating from small tubercules and ≈ 10 shorter setae without tubercules (Fig. 12H View Figure 12 ). Hypoproct trapeziform, with two long distal setae and numerous shorter setae throughout (Fig. 12H View Figure 12 ). Sterna unmodified, poorly setose. Pleurosternal carinae absent, only a few small teeth sometimes present on rings 2 and 3. Gonopod’s aperture large, subsemi-circular.
Walking legs: Legs 1-3 in males with swollen femur; coxa 2 with a short mesal apophysis (cf. Strasser 1966a: 341, fig. 13). No other peculiarities.
Gonopods (Figs 13 View Figure 13 , 17J View Figure 17 ): Coxa (cx) large, semi-circular in ventral and lateral views, with differentiated gonocoel mesally; lateral part swollen, alveolate, with three long setae near mesal ridge. Cannula (ca) long, C-shaped. Telopodite long compared to coxa, consisting of a transverse, setose prefemorite (pf) and a somewhat C-shaped (in lateral and mesal views) acropodite (a) longitudinally divided in its distal half into two branches, solenomeral branch (sb) and solenophore (sph). Solenomeral branch positioned mesally, with a narrow base, then abruptly expands and transversely divides into two processes, solenomere (s) and distal solenomeral process (dsp). Solenomere (s) long, slender, distally expanded (in lateral and mesal views), forming U-shaped rift with distal solenomeral process. Distal solenomeral process (dsp) extends in the same direction as solenomere, ¾ the length of solenomere; ending with a small expansion (in lateral and mesal views). Solenophore (sph) longer and more robust than solenomeral branch, characterized by a lateral, ear-shaped lamella (ll) and a distal projection (dp). Lateral lamella (ll) begins at bifurcation of solenomeral branch and solenophore, surrounding laterally solenophore up to beginning of distal projection; lateral margins of lamella smooth. Distal projection (dp) sigmoid (in lateral and mesal views), with well-developed, basal lamellar lobe (bl). Seminal groove (sg) starts from seminal fossa (sf) mesally on prefemorite, extends along mesal side of acropodite up to bifurcation of solenomeral branch and solenophore, then passes on lateral side of solenomeral branch, further on solenomere, ending subdistally.
Habitat.
With its 6131 m of explored channels, the Cerjanska Cave represents one of the longest and most significant fluviokarst underground systems in Serbia. This is a relatively simple speleological object, consisting of one main river channel in two levels with a length of 4903 m, as well as several side channels with a total length of 1228 m ( Nešić 2016). Numerous arthropod taxa have been registered in the cave, from epigean, guanophiles, trogloxenes, and troglophiles to troglobionts ( Pavićević et al. 2016). The troglobionts include the endemic Balkan harvestman Paranemastoma bureschi (Roewer, 1926), the millipede Dazbogosoma naissi Makarov & Ćurčić in Makarov et al. 2012, and the carabid beetle Duvalius rtanjensis provalijae Pavićević, Zatezalo & Popović, 2016, the latter two endemics of Cerjanska Cave.
Despite many years of speleological and biospeleological research in the Cerjanska Cave, the new taxon was not registered until the first Biospeleological Expedition of the Serbian Biospeleological Society, organized at the end of October 2017. All 11 specimens were found in a small area, in the initial part of the cave. One male, one female and seven juveniles were found on the left side of the river, on a small branch of a tree lying on the wet sand. Another male and female were found just on the opposite side of the river, on the wall, in copulation (Fig. 10A View Figure 10 ).
Distribution.
So far, known only from its type locality, the Cerjanska Cave, Serbia (Fig. 18 View Figure 18 ).
Remarks.
This is the first representative of the family Trichopolydesmidae in Serbia.
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.