<documentID-CLB-Dataset="55458"ID-DOI="http://dx.doi.org/10.3897/zookeys.1102.81247"ID-GBIF-Dataset="0eae6a15-7637-4b60-ad9c-1a12e28e0d7a"ID-PMC="PMC9848831"ID-Pensoft-Pub="1313-2970-1102-163"ID-Pensoft-UUID="016AD5CFD72859D382A2EB728342F84E"ID-PubMed="36761154"ID-ZooBank="858E536906844DE7AE5C5482472191BA"ModsDocID="1313-2970-1102-163"checkinTime="1653131551996"checkinUser="pensoft"docAuthor="Godeiro, Nerivania Nunes, Zhang, Feng & Bellini, Bruno Cavalcante"docDate="2022"docId="418B71061BFB5A4791C91053FD32A87F"docLanguage="en"docName="ZooKeys 1102: 163-176"docOrigin="ZooKeys 1102"docPubDate="2022-05-20"docSource="http://dx.doi.org/10.3897/zookeys.1102.81247"docTitle="Arrhopalites brevicornis Godeiro & Zhang & Bellini 2022, sp. nov."docType="treatment"docUuid="FED6DB53-B746-424D-93B0-105DA1AFA930"docUuidSource="ZooBank"docVersion="6"id="016AD5CFD72859D382A2EB728342F84E"lastPageNumber="163"masterDocId="016AD5CFD72859D382A2EB728342F84E"masterDocTitle="A new species of Arrhopalites Boerner (Collembola, Symphypleona, Arrhopalitidae) from China, with a key to the Asian species of the caecus group"masterLastPageNumber="176"masterPageNumber="163"pageNumber="163"updateTime="1732855049520"updateUser="ExternalLinkService">
<mods:titleid="CD2B593A0AD4233312CE37A196F2FBB6">A new species of Arrhopalites Boerner (Collembola, Symphypleona, Arrhopalitidae) from China, with a key to the Asian species of the caecus group</mods:title>
<mods:affiliationid="88DC8C3B0BB6053E04E27801233F6E94">Shanghai Natural History Museum, Shanghai Science & Technology Museum, Shanghai 200041, China & Department of Entomology, College of Plant Protection, Nanjing Agricultural University, 210095, Nanjing, China</mods:affiliation>
<mods:affiliationid="D950F4C2E26C21676FD8A5A0D7767FBF">Department of Entomology, College of Plant Protection, Nanjing Agricultural University, 210095, Nanjing, China</mods:affiliation>
<mods:affiliationid="4B8DE66C18268C260FFE5A6D60DAD534">Department of Botany and Zoology, Biosciences Center, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil</mods:affiliation>
<taxonomicNameid="09D99FCEA21F702CF160BBDD7F6F0AA1"LSID="http://zoobank.org/FED6DB53-B746-424D-93B0-105DA1AFA930"authority="Godeiro & Zhang & Bellini, 2022"authorityName="Godeiro & Zhang & Bellini"authorityYear="2022"class="Collembola"family="Arrhopalitidae"genus="Arrhopalites"higherTaxonomySource="CoL"kingdom="Animalia"lsidName="Arrhopalites brevicornis"order="Symphypleona"pageId="0"pageNumber="163"phylum="Arthropoda"rank="species"species="brevicornis"status="sp. nov.">Arrhopalites brevicornis</taxonomicName>
<figureCitationid="BB163DD0880090BC5C6EF46CB8BB3EE6"captionStart="Figure 1"captionStartId="F1"captionText="Figure 1. Arrhopalites brevicornis sp. nov.: habitus of specimen fixed in ethanol."figureDoi="10.3897/zookeys.1102.81247.figure1"httpUri="https://binary.pensoft.net/fig/686722"pageId="0"pageNumber="163">Figs 1</figureCitation>
<figureCitationid="7197CAA4E2691199075202242BF477AD"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">, 2</figureCitation>
<figureCitationid="8B91787FED90BACCC11D7C2D6AAD1B11"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">, 3</figureCitation>
<figureCitationid="B015816FFBB45758C74C69BE431203DF"captionStart="Figure 4"captionStartId="F4"captionText="Figure 4. Arrhopalites brevicornis sp. nov. legs A-C trochanters and femurs I-III (anterior side), respectively D-F tibiotarsi and empodial complexes I-III (anterior side), respectively."figureDoi="10.3897/zookeys.1102.81247.figure4"httpUri="https://binary.pensoft.net/fig/686725"pageId="0"pageNumber="163">, 4</figureCitation>
on slides: 9 females on slides, same data as holotype. Besides the type material, 78 specimens are kept in 98% ethanol at the SNHM, plus several paratype slides are kept at the laboratory of Entomology, NJAU, China.
Antennae short, about 1.4 times the head length. Ant IV not subdivided and short, about twice or less the length of Ant III. Eyes 1+1. Clypeal area a-f lines with 7(+1)/7/5/4-5/5/6 chaetae respectively, plus 3 central chaetae with unclear homologies, frontal area A-C lines with 1/1/2(+1) short stout spines. Small abdomen, dorsal anal valve with 2 cuticular spines per side and 4 sword-shaped smooth chaetae (ms1, mps1-3), ventral anal valves with 2 cuticular spines each and 3 sword-shaped smooth chaetae (mi3, mpi1-2), subanal appendage long, similar in length to mi3, mpi1-2, with a spatulated and apically serrated apex. Manubrium with 5 chaetae on each side, dens ventral formula from the apex to the basis as 3,2,1,1,1, dorsally with 16 chaetae. Mucro with both edges serrated, apically swollen. Ungues I slender, III broad, all with an underdeveloped tunica, unguiculus III with 2 inner teeth.
. Specimens pale yellowish with brownish spots of pigment on frontal and dorsal head and dorso-lateral large abdomen. Body chaetae smooth and acuminate, with the exception of the subanal appendage.
<taxonomicNameid="4D137337E14D9F890C85E7F8BB0A3ABE"authorityName="Godeiro & Zhang & Bellini"authorityYear="2022"family="Arrhopalitidae"genus="Arrhopalites"kingdom="Animalia"lsidName="Arrhopalites brevicornis"order="Collembola"pageId="0"pageNumber="163"rank="species"species="brevicornis">
<figureCitationid="F4D3AF5F7AC96F0CB04FACF6A64187DD"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2</figureCitation>
), ratio antennae: head length of the holotype 1.3:1, type series average 1.4:1. Holotype antennal segments ratio of Ant I:II:III:IV as 1:1.6:2.3:4.3, and of type series (
= 4) as 1:1.3-2.7:2.1-3.3:3.8-6.7. Ant IV short and stout, about twice or less the size of Ant III (in holotype, ratio Ant III:IV = 1:1.87), without subsegments, with about 87 regular chaetae of different sizes distributed in apparently 13 whorls (Fig.
<figureCitationid="275DAFC80E106D3C77EB662721454337"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2A</figureCitation>
). Ant III slightly swollen with 17 chaetae, Ape, Ae, Ap, Ai, Aa, Api, and Aai present, Api slightly reduced, Aai as the accessory microsensillum, sense rods not swollen inside separate invaginations (Fig.
<figureCitationid="62BFCE823FA756FF1E7887383094D75B"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2B</figureCitation>
<figureCitationid="43820249DA85587DC8D322DF94BF1321"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2C</figureCitation>
). Eyes 1+1, head length (eyes to mouth) of holotype 0.25 mm. Clypeal area a-f lines with 7(+1)/7/5/4-5/5/6 chaetae respectively, plus 3 central chaetae of unclear homologies; interantennal area
lines with 2/1(+1) short chaetae respectively, plus 2+2 small oval organs (pseudopores) and 1+1 large circles lacking tegument granules near the lateral chaetae on
<figureCitationid="6102EA39726AB95D79972F92EB2AC6F6"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2D</figureCitation>
<figureCitationid="2B6FD24F89F1231BA54D1AE7393352F1"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2E</figureCitation>
). Labial papilla E lateral finger-shaped, not reaching the papilla apex, other labial structures unclear. Maxillary outer lobe apical chaeta longer than the basal one, sublobal plate with three sublobal hairs (Fig.
<figureCitationid="5455D39241A43D5E539E6937A4F04901"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2F</figureCitation>
<figureCitationid="9AFF8F063A9773188293349E5190C33A"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Arrhopalites brevicornis sp. nov. head A left Ant IV (dorsal side) B left Ant III (ventral side) C left Ant I-II (dorsal side) D anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae E ventral head chaetotaxy - right side shows the complete chaetotaxy, including labial basomedian and basolateral fields F left maxillary outer lobe and sublobal plate G prelabral chaetae and labrum."figureDoi="10.3897/zookeys.1102.81247.figure2"httpUri="https://binary.pensoft.net/fig/686723"pageId="0"pageNumber="163">2G</figureCitation>
<taxonomicNameid="4EEF592F6BB2F653D92088CFB917EFE1"authorityName="Godeiro & Zhang & Bellini"authorityYear="2022"family="Arrhopalitidae"genus="Arrhopalites"kingdom="Animalia"lsidName="Arrhopalites brevicornis"order="Collembola"pageId="0"pageNumber="163"rank="species"species="brevicornis">
anterior head - left side shows the complete chaetotaxy, * marks unpaired chaetae, white arrow points to chaeta present or absent, large dashed circle on central clypeal region marks asymmetrical chaetae
<figureCitationid="3D5B2EAEAE343AAB260722AFB38CC395"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3A, B</figureCitation>
). Trunk length of holotype 0.5 mm. Large abdomen: thorax continuous with abdomen, without any constrictions. Th II with 1 a and 3 m chaetae; Th III with 1 a and 3 m chaetae; Abd I with 5 a, 4 m and 1 p chaetae, respectively. Three chaetae (1-3) on the upper side of bothriotrichum A, plus accessory a1 nearby its alveolus; b1 accessory chaeta between B and C bothriotricha, c2 just under C, c1 absent; bothriotricha A-C misaligned, with B bothriotrichum closer to C than A; dorso-posterior longitudinal series dI-1, dII-1, dIII-1 with 5-7, 9-10 and 6-8 chaetae, respectively; two rows with 3 chaetae each between C and D bothriotricha; D with 4 surrounding chaetae posteriorly; parafurcal area (furcula basis) with 8 regular chaetae; ventral complex with 1 chaeta (Fig.
<figureCitationid="490C907230E8172C95F1ED46CFF70D3E"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3A</figureCitation>
). Small abdomen of the female: dorsal anal valve with as2-4, ms1-5?, mps1-3, and ps1-2 chaetae, ms1 and mps1-3 sword-shaped and smooth, 2 cuticular spines surrounding mps2; ventral anal valves each with ai1-6, ami1-2, mi1-5, mpi1-2, and pi1-3 chaetae, mi3 and mpi1-2 sword-shaped and smooth, mi5 as the subanal appendage long (similar in length to mi3, mpi1-2) with a spatulated and apically serrated apex (sometimes one of the lateral edges is also distally serrated), curved toward the genital opening, 2 cuticular spines surrounding mpi2 (Fig.
<figureCitationid="AD84C9277D5D917FE486046148D9A017"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3B</figureCitation>
<taxonomicNameid="A49028FED3C5397929B1DCE89926640D"authorityName="Godeiro & Zhang & Bellini"authorityYear="2022"family="Arrhopalitidae"genus="Arrhopalites"kingdom="Animalia"lsidName="Arrhopalites brevicornis"order="Collembola"pageId="0"pageNumber="163"rank="species"species="brevicornis">
<figureCitationid="6072B6A6D94937AB19572DE3C765A4E5"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3C-F</figureCitation>
) Collophore with 1 distal chaeta on each side, with a pair of a little wrinkled, almost smooth, sacs. Tenaculum with 3 teeth on each ramus plus the basal tubercle, with a single unpaired apical chaeta. Furcal size length in holotype: manubrium = 75
<figureCitationid="AB90242D2DACCE83015DAF18605C9936"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3C</figureCitation>
<figureCitationid="8497AAD8AF4D4A297FCD066B149974BC"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3D</figureCitation>
<figureCitationid="DA443F44EA30371A15F85DC28BAD0EBB"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3E</figureCitation>
<figureCitationid="6853EA0E67838AA451A30A0C9A435E6D"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3F</figureCitation>
<figureCitationid="9B3625A7F9775DA94FC7B58DEB9663ED"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3A</figureCitation>
<figureCitationid="1170F865C17E5C1E2DFBA876E1EC5003"captionStart="Figure 3"captionStartId="F3"captionText="Figure 3. Arrhopalites brevicornis sp. nov. trunk, proximal legs and furca A large abdomen and coxae chaetotaxy (right side) B female's small abdomen (left side) C right manubrial chaetotaxy (dorsal side) D right dens ventral chaetotaxy E right dens dorsal chaetotaxy F mucro."figureDoi="10.3897/zookeys.1102.81247.figure3"httpUri="https://binary.pensoft.net/fig/686724"pageId="0"pageNumber="163">3A</figureCitation>
). Tibiotarsi without oval organs, tibiotarsus I region F with 3 chaetae (FPae, FPe, and FPpe), whorls I-V with 9,8,8,8,9 chaetae respectively, whorl I without clearly modified chaetae except for a larger dorsal one, whorl V with 2 ventro-distal chaetae (Fig.
). Tibiotarsus II region F with 3 chaetae (FPae, FPe, and FPpe), whorls I-V with 9,8,8,8,7 chaetae respectively, whorl I without clearly modified chaetae except for a slightly larger dorsal one, whorl V with 1 ventro-distal chaeta (Fig.
). Tibiotarsus III region F with 4 chaetae (FPae, FPe, FPpe, and FSa), whorls I-V with 9,8,8,8,7 chaetae respectively, whorl I without clearly modified chaetae except for a slightly larger dorsal one, whorl V with 1 ventro-distal chaeta (Fig.
). Foot complexes I-III with 2 pretarsal chaetae each, 1 anterior and 1 posterior; ungues (claws) without cavity or pseudonychia, but with an underdeveloped tunica covering about 2/3 up to 3/4 of the dorsal ungues, lateral lamellae apparently lacking teeth, each unguis with one internal tooth; unguis I slender, III broad (Fig.
). Unguiculi (empodia) never surpassing the ungues, unguiculus I almost reaching the apex of unguis I, unguiculi II-III clearly shorter; unguiculi I-II with one proximal internal tooth each, unguiculus III with 2 more distal teeth (Fig.
<taxonomicNameid="606D375DAA6CD5D4804C35E075909451"authorityName="Godeiro & Zhang & Bellini"authorityYear="2022"family="Arrhopalitidae"genus="Arrhopalites"kingdom="Animalia"lsidName="Arrhopalites brevicornis"order="Collembola"pageId="0"pageNumber="163"rank="species"species="brevicornis">
<paragraphid="E310AB0185803738E7062EDE63A8509E"pageId="0"pageNumber="163">Distribution and habitat.</paragraph>
<paragraphid="9C2D3346163A06CD8D2428E2047053D2"pageId="0"pageNumber="163">The new species was collected and only recorded in Jilin Province, Changling County, at the Ecological Research Station for Grassland Farm (ERSGF). This region is characterized by a semi-arid continental monsoon climate, with cold, dry winters and warm, rainy summers. Annual mean temperature in the region ranges from 4.68 to 6.48 °C, and annual precipitation is 280 to 400 mm with about 70% falling in the June-August period (Changling County Climate Station, Jilin Province). Changling County is located at a transitional zone of cropping and grazing, with high economical potential. However, drastic environmental disturbances are happening in this region, like sand and dust storms, emergence of saline-alkali soils, and land over-utilization.</paragraph>
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<bibRefCitationid="EEC01CD59480DC428DF82E8D167B0E89"DOI="https://doi.org/10.11646/zootaxa.3666.1.2"author="Vargovitsh, RS"journalOrPublisher="Zootaxa"pageId="0"pageNumber="163"pagination="16 - 30"refId="B31"refString="Vargovitsh, RS, 2013. Cavernicolous Arrhopalites abchasicus sp. nov. (Collembola: Symphypleona: Arrhopalitidae) from the West Caucasus with a key to the World species of the genus. Zootaxa 3666 (1): 16 - 30, DOI: https://doi.org/10.11646/zootaxa.3666.1.2"title="Cavernicolous Arrhopalites abchasicus sp. nov. (Collembola: Symphypleona: Arrhopalitidae) from the West Caucasus with a key to the World species of the genus."url="https://doi.org/10.11646/zootaxa.3666.1.2"volume="3666"year="2013">Vargovitsh (2013)</bibRefCitation>
, according to its ventral (or anterior) dental chaetotaxy (3, 2, 1, 1, 1). Currently, there are ten other Asian species of the genus which belong to this group:
<bibRefCitationid="21CCE39E67010300BCF4000D5A6241B9"author="Bellinger, PF"pageId="0"pageNumber="163"publicationUrl="http://www.collembola.org"refId="B1"refString="Bellinger, PF, Christiansen, KA, Janssens, F, 1996-2022. Checklist of the Collembola of the world. http://www.collembola.org"title="Checklist of the Collembola of the world."url="http://www.collembola.org"year="1996 - 2022">Bellinger et al. 1996-2022</bibRefCitation>
<bibRefCitationid="389388D164024D0D80BB56D972BF5EC2"DOI="https://doi.org/10.11646/zootaxa.3174.1.1"author="Vargovitsh, RS"journalOrPublisher="Zootaxa"pageId="0"pageNumber="163"pagination="1 - 21"refId="B30"refString="Vargovitsh, RS, 2012. New troglomorphic Arrhopalitidae (Collembola: Symphypleona) from the Western Caucasus. Zootaxa 3174 (1): 1 - 21, DOI: https://doi.org/10.11646/zootaxa.3174.1.1"title="New troglomorphic Arrhopalitidae (Collembola: Symphypleona) from the Western Caucasus."url="https://doi.org/10.11646/zootaxa.3174.1.1"volume="3174"year="2012">Vargovitsh 2012</bibRefCitation>
<bibRefCitationid="6F6604F3BF03743378D8FF81785D4485"DOI="https://doi.org/10.11646/zootaxa.3666.1.2"author="Vargovitsh, RS"journalOrPublisher="Zootaxa"pageId="0"pageNumber="163"pagination="16 - 30"refId="B31"refString="Vargovitsh, RS, 2013. Cavernicolous Arrhopalites abchasicus sp. nov. (Collembola: Symphypleona: Arrhopalitidae) from the West Caucasus with a key to the World species of the genus. Zootaxa 3666 (1): 16 - 30, DOI: https://doi.org/10.11646/zootaxa.3666.1.2"title="Cavernicolous Arrhopalites abchasicus sp. nov. (Collembola: Symphypleona: Arrhopalitidae) from the West Caucasus with a key to the World species of the genus."url="https://doi.org/10.11646/zootaxa.3666.1.2"volume="3666"year="2013">2013</bibRefCitation>
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sp. nov. can be distinguished from all of them especially by the unguiculus III with 2 internal teeth (0-1 in all other species). Also, the combination of antennae less than 2 times the size of the head, Ant IV without annulations, 1+1 eyes, dorsal head with 9 spines, 2+2 regular spines per side on the anal valves, circumanal chaetae without basal serrations, subanal appendage long and apically serrated, similar in length to mi3, mpi1-2, manubrium with 5+5 and dorsal dens with 16 chaetae is unique among the Asian species of the
<tableCitationid="2BAEB04AD8742C0D140C42D3EF6AE4B5"captionStart="Table 1"captionStartId="T1"captionText="Table 1. Comparison between the Asian species of Arrhopalites from the Arrhopalites caecus group."httpUri="http://table.plazi.org/id/A4A03F279612A5AD91A0FB2781FC6249"pageId="0"pageNumber="163"tableUuid="A4A03F279612A5AD91A0FB2781FC6249">1</tableCitation>
<bibRefCitationid="E600C5BCEC67D5E15B6E852267099CA9"DOI="https://doi.org/10.1163/ej.9789004157705.i-265"author="Fjellberg, A"journalOrPublisher="Fauna Entomologica Scandinavica"pageId="0"pageNumber="163"pagination="1 - 264"refId="B17"refString="Fjellberg, A, 2007. The Collembola of Fennoscandia and Denmark, Part II: Entomobryomorpha and Symphypleona. Fauna Entomologica Scandinavica 42: 1 - 264, DOI: https://doi.org/10.1163/ej.9789004157705.i-265"title="The Collembola of Fennoscandia and Denmark, Part II: Entomobryomorpha and Symphypleona."url="https://doi.org/10.1163/ej.9789004157705.i-265"volume="42"year="2007">Fjellberg 2007</bibRefCitation>
<bibRefCitationid="AEBF4188684189EF4CBCFCF021C9A4F3"DOI="https://doi.org/10.11646/zootaxa.3666.1.2"author="Vargovitsh, RS"journalOrPublisher="Zootaxa"pageId="0"pageNumber="163"pagination="16 - 30"refId="B31"refString="Vargovitsh, RS, 2013. Cavernicolous Arrhopalites abchasicus sp. nov. (Collembola: Symphypleona: Arrhopalitidae) from the West Caucasus with a key to the World species of the genus. Zootaxa 3666 (1): 16 - 30, DOI: https://doi.org/10.11646/zootaxa.3666.1.2"title="Cavernicolous Arrhopalites abchasicus sp. nov. (Collembola: Symphypleona: Arrhopalitidae) from the West Caucasus with a key to the World species of the genus."url="https://doi.org/10.11646/zootaxa.3666.1.2"volume="3666"year="2013">Vargovitsh 2013</bibRefCitation>
share a similar color pattern, number of eyes, the presence of dorsal spines on head and number of dorsal dens chaetae with the new species. However the later differs from them by: the absence of Ant IV annulations (7 of
anal valves have no cuticular spines and their subanal appendage is short (vs. 2+2 spines per side and the subanal appendage is long, respectively) and its dorsal dens shows 15 chaetae (vs. 16 in the new species). A detailed comparison of the morphology and the known distribution of all the cited species is presented in Table
<tableCitationid="02511A3E559C4E28646AD27C6501BD35"captionStart="Table 1"captionStartId="T1"captionText="Table 1. Comparison between the Asian species of Arrhopalites from the Arrhopalites caecus group."httpUri="http://table.plazi.org/id/A4A03F279612A5AD91A0FB2781FC6249"pageId="0"pageNumber="163"tableUuid="A4A03F279612A5AD91A0FB2781FC6249">1</tableCitation>
