Nannarrup oyamensis Tsukamoto, 2022
|
publication ID |
https://dx.doi.org/10.3897/zookeys.1115.83946 |
|
publication LSID |
lsid:zoobank.org:pub:AB895061-8444-4026-B593-37331E598259 |
|
persistent identifier |
https://treatment.plazi.org/id/1543ADD5-1C03-4471-9B6F-D473E4BB0F22 |
|
taxon LSID |
lsid:zoobank.org:act:1543ADD5-1C03-4471-9B6F-D473E4BB0F22 |
|
treatment provided by |
|
|
scientific name |
Nannarrup oyamensis Tsukamoto |
| status |
sp. nov. |
Nannarrup oyamensis Tsukamoto sp. nov.
New Japanese name: Amefuri-himejimukade Figs 12 View Figure 12 , 13 View Figure 13 , 14 View Figure 14 , 15 View Figure 15 , 16 View Figure 16 , 17 View Figure 17
Type material.
Holotype 1 adult male, Hinata, Isehara-shi, Kanagawa prefecture, Japan (35°26.07'N, 139°14.75'E), 17 February 2021, coll. Sho Tsukamoto (labeled as TS20210217-04), deposited at the Collection of Myriapoda, Department of Zoology, NSMT. Paratype 1 subadult male, Hinata, Isehara-shi, Kanagawa prefecture, Japan (35°26.07'N, 139°14.75'E), 25 July 2021, coll. Sho Tsukamoto (labeled as TS20210725-02), deposited at MNHAH.
Etymology.
The species name is derived from the name of Japanese mountain, namely Mt. Oyama. The word was further Latinized by adding the Latin masculine adjective suffix - ensis, to form Nannarrup oyamensis oyamensis . The last “a” of Oyama and the first “e” of -ensis are merged into “e.” Examined specimens were collected from Mt. Oyama, an object of the mountain worship.
Diagnosis.
Clypeus without smooth or weakly areolate areas along the posterior part of the paraclypeal sutures; forcipular trochantroprefemur with a large denticle (longer than wide); tarsungulum with a well-pigmented denticle; metasternite of ultimate leg-bearing segment wider than long.
Description.
General features: Body 8.6 mm long (holotype), gradually attenuate posterior, almost uniformly very pale yellow, with head and forcipular segment pale ocher.
Cephalic capsule (Fig. 12A, B View Figure 12 ): Cephalic plate ca 1.5 × as long as wide, lateral margins more distinctly converging anteriorly than posteriorly, posterior margin straight; scutes approximately isometric and up to ca 15 μm wide; transverse suture absent; setae up to ca 50 μm long. Clypeus ca 1.5 × as wide as long, with lateral margins complete, almost uniformly areolate, with scutes ca 10 μm wide, a pair of clypeal areas absent; 13 setae in holotype, 1+1 postantennal, 1+1 median, 5+4 prelabral; clypeal ratio ca 1: 7; clypeal plagulae without additional smooth area along posterior part of paraclypeal sutures; 17 pore-like organs on entire part of clypeus. Anterior and distolateral parts of pleurites areolate, without setae. Side-pieces of labrum medially in contact, only incompletely divided into anterior and posterior alae by weak chitinous line, without longitudinal stripes on posterior alae; with slightly visible short fringe on posterior margin of side-pieces; mid-piece as long as wide, converging anteriorly and posteriorly.
Antenna (Fig. 13A-D View Figure 13 ): Antenna with 14 articles, when stretched, ca 2.3 × as long as head length. Intermediate articles slightly longer than wide. Article XIV ca 2.0 × as long as wide, ca 1.9 × as long as article XIII, and 1.9-2.1 × as long as intermediate articles. Setae on articles VIII-XVI denser than articles I-VII. Setae gradually shorter from article VIII to XIV, up to 50 μm long on article I, up to 33 µm long on article VIII and <18 μm long on article XIV. Article XIV with two types of sensilla, apical sensilla (arrows in Fig. 13C, D View Figure 13 ) ca 5 μm long, with wide flat ring at mid-length; club-like sensilla (arrowheads in Fig. 13C, D View Figure 13 ) ca 10 μm long, clustered in the distal parts of the internal and external sides of the article. Three longitudinal rows consisted of ca 9 proprioceptive spine-like sensilla at bases of antennal articles II-V, VII-IX, approximately dorsal, ventro-internal and ventro-external; rows reduced to 1-3 spines on antennal articles I and VI, and 0-1 spine on antennal articles X-XIV. A few pointed sensilla, up to 2.5 μm long, on both dorso-external and ventro-internal position, close to distal margin of articles II, V, IX and XIII.
Mandible (Fig. 14A View Figure 14 ). At least four pectinate lamellae, with elongated teeth. Each tooth ca 2 × as long as wide.
First maxillae (Fig. 14B View Figure 14 ): Coxosternite medially divided but slightly, without setae, faintly areolate. Coxal projections well developed and hyaline distally, provided with 1+1 setae and 3+4 small sensilla. Telopodite uni-articulated and hyaline distally, with one (two) seta(e). No lobes on either coxosternite or telopodites.
Second maxillae (Fig. 14B View Figure 14 ): Coxosternite medially undivided, without suture, with 2+3 setae along the anterior margin, with 4+4 setae located behind anterior margin, with anterior margin slightly concave, with metameric pores on posterior part. Telopodites tri-articulate overreaching medial projections and telopodites of first maxillae. Claw of telopodite virtually absent, represented by short spine only.
Forcipular segment (Fig. 15A-D View Figure 15 ): Tergite trapezoidal, ca 1.9 × as wide as long, with lateral margins converging anteriorly, approximately as wide as cephalic plate and ca 0.7 × as wide as following tergite, 1+1 setae of similar length arranged in an anterior row, and 3+3 setae of similar length arranged in a posterior row, one pair of longitudinal rows of three tiny setae located between middle and distal setae in posterior row. Mid-longitudinal sulcus of tergite not visible. Exposed part of coxosternite ca 1.3 × as wide as long; anterior margin with shallow medial concavity and with one pair of denticles; coxopleural sutures complete in entirely ventrum, sinuous and diverging anteriorly; chitin-lines absent. Basal distance between forcipules ca 0.1 × of maximum width of coxosternite. Trochanteroprefemur ca 1.3 × as long as wide; with a well-developed and strong pigmented denticle at distal internal margin, ca 1.3 × as long as wide. Intermediate articles distinct, tubercle on tibia not visible. Tarsungulum with basal denticle well-pigmented; both external and internal margins uniformly curved, except for moderate mesal basal bulge; ungulum not distinctly flattened. Elongated poison calyx (circle in Fig. 15D View Figure 15 ), ca 6 × as long as wide, lodged inside intermediate forcipular articles.
Leg-bearing segments (Fig. 16A-D View Figure 16 ): Forty-one pairs of legs present. Metatergite 1 slightly wider than subsequent one, with two paramedian sulci visible on tergites of anterior half of body, without pretergite. No paratergites. Walking legs shorter than width of trunk; legs of first pair much smaller than following ones; claws simple, uniformly bent, with two accessory spines; anterior spine reaching at most 10% of length of claw; posterior spine shorter than anterior spine. Metasternites slightly longer than wide. Sternal sulcus visible on a few anterior sternites, represented by very shallow mid-longitudinal thickening, anterior not furcate. No ventral glandular pores on each metasternite.
Ultimate leg-bearing segment (Fig. 17A-D View Figure 17 ): Pretergite not accompanied by pleurites but incomplete traces of sutures present at both sides. Metatergite subtrapezoidal, almost as wide as long, lateral margins convex and converging posteriorly; posterior margin slightly curved. Coxopleuron ca 1.2 × as long as metasternite; coxal organs of each coxopleuron opening through five or six independent pores, placed ventrally. Metasternite subtriangular, ca 1.6 as wide as long, anteriorly ca 3.5 × as wide as posteriorly; lateral margins slightly convex and converging backward; setae almost arranged symmetrically, dense on posterior margin. Telopodite ca 11 × as long as wide, ca 1.9 × as long and ca 1.3 × as wide as penultimate telopodite, with 6 articles; tarsus 2 ca 2.7 × as long as wide and ca 1.5 × as long as tarsus 1; setae arranged uniformly, <50 μm long. Pretarsus represented by spines, up to 5 µm.
Male postpedal segments (Fig. 17A, B View Figure 17 ): Two gonopods, very widely separated from one another, conical in outline, uni-articulated without any sutures, covered with setae. Anal pore present.
Female postpedal segments unknown (female unknown).
Distribution.
Only known from Mt. Oyama, located in Isehara-shi, Kanagawa prefecture.
Remarks.
Nannarrup oyamensis sp. nov. is distinguishable from the two congeners by the absence of smooth or weakly areolate areas along the posterior part of the paraclypeal sutures. Specifically, N. oyamensis sp. nov. can be clearly distinguished from N. hoffmani by the presence of a well-developed denticle on the trochanteroprefemur (width: length = 1:1.3) and the absence of smooth or weakly areolate areas along the posterior part of the paraclypeal sutures. Furthermore, N. oyamensis sp. nov. can be distinguished from N. innuptus sp. nov. by the absence of a pair of smooth or weakly areolate areas along the posterior part of the paraclypeal sutures (see Table 3 View Table 3 for a comparison of characteristics).
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.