<documentID-CLB-Dataset="3005"ID-DOI="http://dx.doi.org/10.3897/subtbiol.41.76926"ID-GBIF-Dataset="51e88f30-cebb-4ab4-97a1-64f972ad1e10"ID-Pensoft-Pub="1314-2615-41-1"ID-Pensoft-UUID="482986A3D1D15408B0FE4F5EF7587312"ID-ZooBank="73326F5CC4BE431DBE6D601A69BD7FFA"ModsDocID="1314-2615-41-1"checkinTime="1639196417009"checkinUser="pensoft"docAuthor="Nilsai 1, Areeruk, Detcharoen 1, Matsapume, Godeiro 2, Nerivania Nunes & Jantarit 3, Sopark"docDate="2021"docId="062ED1E3E1445A75B5F09CFD99785D66"docLanguage="en"docName="SubterBiol 41: 1-42"docOrigin="Subterranean Biology 41"docPubDate="2021-12-10"docSource="http://dx.doi.org/10.3897/subtbiol.41.76926"docTitle="Coecobrya troglobia Jantarit & Nilsai 2021, sp. nov."docType="treatment"docUuid="392BEEC9-7496-49B0-BF2E-3A3822F60A0B"docUuidSource="ZooBank"docVersion="6"id="482986A3D1D15408B0FE4F5EF7587312"lastPageNumber="1"masterDocId="482986A3D1D15408B0FE4F5EF7587312"masterDocTitle="Four new species of troglomorphic Coecobrya Yosii, 1956 (Collembola, Entomobryidae) from Thailand based on morphological and molecular evidence, with an updated key of Thai troglomorphic species"masterLastPageNumber="42"masterPageNumber="1"pageNumber="1"updateTime="1732799977463"updateUser="ExternalLinkService">
<mods:titleid="1008E5A49EE52E18603C46BA9CB322B6">Four new species of troglomorphic Coecobrya Yosii, 1956 (Collembola, Entomobryidae) from Thailand based on morphological and molecular evidence, with an updated key of Thai troglomorphic species</mods:title>
<mods:affiliationid="79A2BC861E4A191B9BB3CBD2300DFAEA">Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand</mods:affiliation>
<mods:affiliationid="44AB7AE833321B0E735E91B77A217BEB">Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand</mods:affiliation>
<mods:affiliationid="1B110B1D7F0EEEEEAEF7ECD803F2EBDA">Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand</mods:affiliation>
<mods:affiliationid="21BDD0524EBCAB3E69C9335FC84E57D2">Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand</mods:affiliation>
<taxonomicNameid="D29E89A900FDC6F39C6192BBE79C7A64"LSID="http://zoobank.org/392BEEC9-7496-49B0-BF2E-3A3822F60A0B"authority="Jantarit & Nilsai"authorityName="Jantarit & Nilsai"authorityYear="2021"class="Collembola"family="Entomobryidae"genus="Coecobrya"higherTaxonomySource="CoL"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Entomobryomorpha"pageId="0"pageNumber="1"phylum="Arthropoda"rank="species"species="troglobia"status="sp. nov.">Coecobrya troglobia Jantarit & Nilsai</taxonomicName>
<figureCitationid="D0AEA81A093DCCFDE917C4E7C096AB2F"captionStart="Figure 1"captionStartId="F1"captionText="Figure 1. The distribution map of the troglomorphic Coecobrya in Thailand and the habitus of the four new species. (1) A Coecobrya whitteni sp. nov. (2) B C. troglobia sp. nov. (3) C C. ellisi sp. nov. (4) D C. phitsanulokensis sp. nov. (5) C. chumphonensis Zhang & Nilsai, 2017 (6) C. sirindhornae Jantarit, Satasook & Deharveng, 2019 (7) C. polychaeta Zhang & Nilsai, 2017 and (8) C. cavicta Nilsai & Zhang, 2017. Scale bar: 1 mm."figureDoi="10.3897/subtbiol.41.76926.figure1"httpUri="https://binary.pensoft.net/fig/621479"pageId="0"pageNumber="1">Figures 1B</figureCitation>
<figureCitationid="278C772B758C50F17D35F25D45DEA0BD"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">, 5</figureCitation>
<figureCitationid="E4E9B32E37DBAC75C8802E7C36AA816F"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">, 6</figureCitation>
<figureCitationid="A3B3C6AFAF4A43DB1C88D5BC67FC2FEA"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">, 7</figureCitation>
<figureCitationid="76FCBD2FB84EACEA25F096AB438E9ADF"captionStart="Figure 1"captionStartId="F1"captionText="Figure 1. The distribution map of the troglomorphic Coecobrya in Thailand and the habitus of the four new species. (1) A Coecobrya whitteni sp. nov. (2) B C. troglobia sp. nov. (3) C C. ellisi sp. nov. (4) D C. phitsanulokensis sp. nov. (5) C. chumphonensis Zhang & Nilsai, 2017 (6) C. sirindhornae Jantarit, Satasook & Deharveng, 2019 (7) C. polychaeta Zhang & Nilsai, 2017 and (8) C. cavicta Nilsai & Zhang, 2017. Scale bar: 1 mm."figureDoi="10.3897/subtbiol.41.76926.figure1"httpUri="https://binary.pensoft.net/fig/621479"pageId="0"pageNumber="1">1B</figureCitation>
. Body length 2.0-2.4 mm (holotype 2.4 mm). No scales. Eyes absent. Color: whitish in alcohol, without pigmentation. Four antennal segments (sometimes Ant. II and III fused together). Body slender not bent nor humped at the level of Th. II., elongated antennae, legs and furca. Th. II slightly larger than Th. III; Abd. IV about 3.5 times as long as Abd. III along the dorsal midline.
<figureCitationid="F2DDA27E53EAB77E3AC4F82ED907873E"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6D</figureCitation>
<figureCitationid="8664B7BCADACD8E8CB6483EEA3CF1F17"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A-C</figureCitation>
<figureCitationid="EA3E40DC58E6FD26A66EB5D271893F64"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A-C</figureCitation>
), except for the coxae and manubrium where psp are as large as mac sockets, present on various parts of the body: antennae, head, tergites, coxae and manubrium. On antennae, psp located ventro-apically between the tip of antennal segments and the chaetae of the apical row, or just below apical row of chaetae (2 psp on Ant. I, 2-3 psp on Ant. II, and 3 psp on Ant. III). On head, 1-2 psp located externally on each peri-antennal area. On tergites, 1+1 psp close to the axis from Th. II to Abd. IV (Figs
<figureCitationid="A064FF08DC19E77FBFBBB9E489A14B16"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A-C</figureCitation>
). On coxae, 1-2 psp on coxae I, 2-3 psp on coxae II and 1-2 psp on coxae III, located close to longitudinal rows of chaetae. On manubrium, 2+2 dorso-apical ones (Fig.
<figureCitationid="CCDC88C15DF5989A50679FBABFC108FD"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6D</figureCitation>
<figureCitationid="EE7B71CBFD07334E387A2FDFDF6F9588"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5A, B, D, G, H</figureCitation>
<figureCitationid="CEBE56168E7C223BD5A9747661B936E1"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6H</figureCitation>
). Clypeal area with nine chaetae arranged in three rows, three long smooth prefrontal, 2+2 small ciliated chaetae sometimes asymmetric arrangement, and 1+1 long smooth facial chaetae, the lateral long smooth chaetae not seen (Fig.
<figureCitationid="B7BCFD52F8855271DC25C99ABE3DDCB8"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5H</figureCitation>
). Prelabral and labral chaetae 4/5, 5, 4, all thin and smooth; three median chaetae of the second rows longer and slightly larger than those of the distal and proximal rows and longer than lateral ones (35-40 vs. 25-30
<figureCitationid="1FB49E260CE689B7F90DC3AA2B83D953"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5A</figureCitation>
). Distal border of the apical non-granulated area of the labrum with a relatively narrow median U- or V-form intrusion into the granulated area dorsally; apical edge without spines (Fig.
<figureCitationid="61A8706F3129169B98D146D65BF94DD2"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5A</figureCitation>
). Ventro-distal complex of labrum well differentiated, asymmetrical, with 1+1 distal combs of 14-16 minute on the right side and 14-16 strong and larger teeth on the left side (Fig.
<figureCitationid="AB0D16E402EE07B108F8C9758FAA3AA7"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5B</figureCitation>
), and an axial pair of long sinuous tubules. Maxillary outer lobe with one basal chaeta, one apical chaeta (basal chaeta thicker than apical one) and three smooth sublobal hairs (60-65 vs. 35-38
<figureCitationid="FB5F59DD021F0B7A212BD467475854A6"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5D</figureCitation>
). Labial palp strongly modified for the genus, with 0, 5, 0, 4, 4 guards for papillae A-E. Lateral process of labial palp subcylindrical, as thick as normal chaetae with tip beyond the apex of the labial papilla (Fig.
<figureCitationid="7CD0D65D0F27E281ACD13C34F63E38DE"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5G</figureCitation>
<figureCitationid="639ECDA87B6D18B9D8E96AEBC3D0D8D5"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6H</figureCitation>
); molar plate with three strong pointed basal teeth, and 3-(5) smaller inner distal teeth, identical in both mandibles. Maxilla capitulum with a three-toothed claw and several stout ciliated lamellae; lamella 2 large and broad, lamella 3 well developed; several other lamellae present.
<taxonomicNameid="CD771DCCCF350689D51124B0EAB186CD"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
<taxonomicNameid="AD052C0F54285DD8312D9B125632C726"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
<taxonomicNameid="912071B1D189C9469159105CBD1EB58E"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
<figureCitationid="000077A4B0EFA2DA62577A2AA9E68D42"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5C, E</figureCitation>
). Antennae very long, approximately 4.0-6.8 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.1-2.7: 0.7-2.4: 2.1-4.6 (N = 5). Antennal segments not subdivided nor annulated. Antennal chaetal types not analysed in detail. Smooth spiny mic at base of antennae: 3 dorsal, 3 ventral on Ant. I, 1 internal, 1 external and 1 ventral on Ant. II, 1 smooth ventral on Ant. I, smooth straight long chaetae on antennae present. Ant. I ventrally with many smooth spiny mic of various sizes in its basal part, many subcylindrical, hyaline sens in its middle to apical part, and many long smooth straight chaetae. The paddle-like chaetae on Ant II absent. Ant. III organ with five sens; sens one and four subequal, hyaline; sens five acuminate, dark and shorter; sens two and three swollen (Fig.
<figureCitationid="769D4252DEDE2270DE566167B3AD80CB"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5C</figureCitation>
). Ant. IV very long, not subdivided, without apical bulb. Subapical organite not distinctly knobbed, swollen, slightly enlarged apically, inserted dorsally (Fig.
<figureCitationid="4473091709372527C2B80F7BE020249B"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5E</figureCitation>
<figureCitationid="62E16E1D962C96195491AADEB21AE216"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6I</figureCitation>
). Dorsal cephalic chaetotaxy with five antennal chaetae (An1-3, An3a, An3a2, An1 as mes), four anterior mac (A0, A2-3 and A5) three median (M1-2, M4) and eight sutural mac (S0, S1-7); Gr. II with four mac; A0 as mac; 6+6 scale-like structures present below sutural mac, probably inside the integument; a pair of short cephalic trichobothria, external and close to the middle of the head (Fig.
<figureCitationid="FE88B911D4D0F4C9753A18C3ED19BBE6"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6I</figureCitation>
<figureCitationid="6EE9CD6279A8455200EC374A77B02B67"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5F</figureCitation>
). Chaetae of labial basis all smooth (mrel1l2), chaetae m, e and l1 subequal, r thin and shortest, and l2 longest, The r/m length ratio: 0.11-0.16 (Fig.
<figureCitationid="87B40458F399ABA261E687E2B7737F8D"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5F</figureCitation>
). Postlabial chaetae X2, X and X4 smooth and minute chaetae, X1 and X3 absent. On each side of cephalic groove with 9 chaetae, of which the anterior six always long and smooth, 7thand 9th as mics, 8th always long and ciliated, one specimen with three mics distally in one side (Fig.
<figureCitationid="F7ECD746E04C2DCBB5C54EDEBCFBD060"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5F</figureCitation>
<figureCitationid="B1267EB07F7EB65CBB3B70601E1BD1C7"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A-D</figureCitation>
<figureCitationid="F7FBDCD550F106667A2DAE1BF41FB15C"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A</figureCitation>
<figureCitationid="B69FE9E74C00D4F20E6A41186FBDC014"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A</figureCitation>
<figureCitationid="05C415588BE8AA4996773AB98F10CCC1"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7B</figureCitation>
Abd. II with two (m3, m3e) central and one (m5) lateral mac. 2+2 tric without modified chaetae, 1+1 sens laterally and 1+1 mic near internal tric (Fig.
<figureCitationid="4A4BD94F0219E07C9AD486FD3BDEF322"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7B</figureCitation>
Abd. III with one (m3) central, and three (am6, pm6, p6) lateral mac. 3+3 tric without modified chaetae, 1+1 sens laterally, 1+1 mic near m3, ms not seen (Fig.
<figureCitationid="95CF161BF169848A36D1EA55AC47A757"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7B</figureCitation>
Abd. IV with five central mac (I, A5-6, B4-5) and six (D3, E1, E2p, E3-4, F3) lateral mac, 2+2 tric and about 18 long S-like chaetae anteriorly, without modified chaetae (Fig.
<figureCitationid="9694104DF6A5039717D84B4DDD8B3B64"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7C</figureCitation>
<figureCitationid="B12881BB8D5FD91B1C9AE83C8B5700DA"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7D</figureCitation>
). Abd. VI not analysed. S-chaetae formula from Th. II to Abd. V: 2+ms, 2/1+ms, 2, 2, ≈15-18, 3; ps not seen, as sens on Abd. IV 1/3 as long as S-like chaetae (Figs
<figureCitationid="9A359AD08F218F0AEB42770CB430FCCB"captionStart="Figure 7"captionStartId="F7"captionText="Figure 7. Coecobrya troglobia sp. nov., continued A Chaetotaxy of dorsal Th. II- III B dorsal Abd. I- III C Chaetotaxy of dorsal Abd. IV D Chaetotaxy of dorsal Abd. V."figureDoi="10.3897/subtbiol.41.76926.figure7"httpUri="https://binary.pensoft.net/fig/621485"pageId="0"pageNumber="1">7A-D</figureCitation>
<figureCitationid="6351CE51F268DD509BACC5758F47CE1E"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6E, G</figureCitation>
). Leg long; tita of leg III slightly longer than tita of legs I and II. Legs devoid of scales, covered with ordinary ciliated chaetae of various lengths, mic not seen. Trochanteral organ with 19-23 smooth, straight, unequal spine-like chaetae (Fig.
<figureCitationid="02EA89FADC5BE26686A08967E84F306B"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6E</figureCitation>
). The distal whorl of tita with 9-10 subequal ciliated mes, irregularly arranged, and usually dorso-apical clavate tenent hair present (two specimens claw III with pointed tenent hair). A smooth, thin and long chaeta close to the absent tenent hair. Ventro-distal smooth chaeta of tita III thick, erected, pointed, rather short. Claw rather slender and elongated. Unguis of all claws with two inner teeth, one-minute tooth at about 90 % from base of the claw, and a strong inner tooth at 40-46 %, and a pair of subequal basal teeth at about 30-34 % of inner edge from basis. Unguiculus approximately 2/3 as long as inner edge of the claw, rather swollen baso-externally, pointed apically, with one inner tooth and at least four minute outer teeth, often inconspicuous near the tip of its length (Fig.
<figureCitationid="AA54E8798DB1CC5FC9CC549D86E03EDB"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6G</figureCitation>
<figureCitationid="7786D96DA4A86499574C7AE956F82D21"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5I</figureCitation>
<figureCitationid="D5AA7548CA72660731AE3E7455D21B41"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6A-C</figureCitation>
). Ventral tube three to four times longer than wide. Lateral flaps usually with 7-9+7-9 smooth chaetae, sometimes 1-2 ciliated present. In the holotype, 10 smooth and one ciliated chaeta present on one side (Fig.
<figureCitationid="21A8802E78FF0F6940AC3ECD82B43EA6"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Coecobrya troglobia sp. nov. A Prelabral and labral chaetae B Ventro-distal complex of labrum C Ant. III organ D Outer maxillary lobe E Subapical organ of Ant. IV F Chaetae of labial basis and ventral chaetotaxy of head G Labial palp H Clypeal chaetae I Lateral flap."figureDoi="10.3897/subtbiol.41.76926.figure5"httpUri="https://binary.pensoft.net/fig/621483"pageId="0"pageNumber="1">5I</figureCitation>
<figureCitationid="75CC88166A53F2B0712BA759F99ED909"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6B</figureCitation>
); posterior face with 4 long, smooth chaetae apically, the middle chaetae with 4-6 long, smooth chaetae mixed with 5-6 mic arranged roughly asymmetrically, and 2-3 proximal chaetae, ciliated in the holotype (Fig.
<figureCitationid="8E9FD05669348EB39C4A6D69039D3771"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6C</figureCitation>
<figureCitationid="3BB14FA095810D0587A84ED202ED6417"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6A</figureCitation>
<figureCitationid="4899FD34EB5A91B3DF1CB4581F75981A"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6D, F</figureCitation>
). Tenaculum with four large teeth of decreasing size from the basal to the distal one of each ramus, on a prominent, irregular body, with a postero-basal strong serrated chaeta bent distally. Mucrodens 1.15-1.42 times longer than manubrium. Furcula without smooth chaetae. Manubrium densely cover of ciliated chaetae both dorsally and ventrally. Manubrial plaque with 2+2 psp and five ciliated chaetae (Fig.
<figureCitationid="F1614C534C4C0828B093036684D55463"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6D</figureCitation>
). Distal part of the ventral manubrium not clearly seen in all specimens. Dens without spines, annulated and covered with ciliated chaetae on both sides. Distal smooth part of dens as long as the mucro. Mucro strong and falcate, basal spine long, nearly reaching the tip of the mucronal tooth (Fig.
<figureCitationid="687CD5C68C609982201C09625B700B4E"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Coecobrya troglobia sp. nov., continued A Posterior side of ventral tube B Anterior side of ventral tube C Posterior side of ventral tube D Distal part of manubrium ventrally E Trochanteral organ F Mucro G Distal part of tita III and claw complex H Mandibles I Dorsal cephalic chaetotaxy."figureDoi="10.3897/subtbiol.41.76926.figure6"httpUri="https://binary.pensoft.net/fig/621484"pageId="0"pageNumber="1">6F</figureCitation>
<taxonomicNameid="F3939364E7346CE27293FB51D6641AB6"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
sp. nov. is restricted to the dark zone of the cave, where it was found in two chambers in an oligotrophic environment. Most individuals were found on the floor, on stalagmites and on the rock walls. The temperature in the dark zone was 21.4-23 °C and the relative humidity was about 75 %.
<taxonomicNameid="0BEEF093B36949549E1BC73A2DE6590B"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
Nilsai & Zhang, 2017 from Satun province, southern Thailand in the number of mac of M series and Gr. II of dorsal head chaetotaxy, labial chaetae, number of sublobal hairs on maxillary outer lobe, number of mac on medio-medial area of Th.II, number of mac on Abd. III. However,
<taxonomicNameid="71097A7D3E635EE98946B71ECF92A8D7"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
by having bigger body size, longer length of antennae, number of chaetae along cephalic groove, number of mac of dorsal tergits on Th. II (20-23 vs. 36-37), Th. III (24-27 vs. 35), Abd. II (2 vs. 3) and Abd. IV (11 vs. 18-20), number of inner teeth of claw (3 vs. 2) and number of smooth chaetae of trochanteral organ (19-23 vs. 15-16) (see Table
<tableCitationid="ECCF2DEDAF64112E14C678AC511F6512"captionStart="Table 1"captionStartId="T1"captionText="Table 1. Comparison of troglomorphic Coecobrya in Thailand: C. chumphonensis Zhang & Nilsai, 2017, C. cavicta Nilsai & Zhang, 2017, C. polychaeta Zhang & Nilsai, 2017, C. sirindhornae Jantarit, Satasook & Deharveng, 2019, C. nupa Christiansen & Bellinger, 1992. C. whitteni Nilsai and Jantarit sp. nov., C. troglobia Jantarit and Nilsai sp. nov., C. ellisi Jantarit and Nilsai sp. nov., C. phitsanulokensis Jantarit and Nilsai sp. nov. Key: c = ciliated chaetae, s = smooth chaetae,? = not given in literature description. Characters indicated in parentheses are rarely observed."httpUri="http://table.plazi.org/id/5378ECD9BC57B445F8A5FA2E10CEA7D7"pageId="0"pageNumber="1"tableUuid="5378ECD9BC57B445F8A5FA2E10CEA7D7">1</tableCitation>
<taxonomicNameid="5EE12CB367264689115B1CEB92FABC0B"authorityName="Jantarit & Nilsai"authorityYear="2021"family="Entomobryidae"genus="Coecobrya"kingdom="Animalia"lsidName="Coecobrya troglobia"order="Collembola"pageId="0"pageNumber="1"rank="species"species="troglobia">
sp. nov. from Tham Nayn Noi in Chum Phae district, Khon Kaen province, but they clearly differ from each other in a few morphological characters, see the detailed diagnosis in the remarks under
<tableCitationid="A10EE4AFE529A70E7820B36EDDF5B355"captionStart="Table 1"captionStartId="T1"captionText="Table 1. Comparison of troglomorphic Coecobrya in Thailand: C. chumphonensis Zhang & Nilsai, 2017, C. cavicta Nilsai & Zhang, 2017, C. polychaeta Zhang & Nilsai, 2017, C. sirindhornae Jantarit, Satasook & Deharveng, 2019, C. nupa Christiansen & Bellinger, 1992. C. whitteni Nilsai and Jantarit sp. nov., C. troglobia Jantarit and Nilsai sp. nov., C. ellisi Jantarit and Nilsai sp. nov., C. phitsanulokensis Jantarit and Nilsai sp. nov. Key: c = ciliated chaetae, s = smooth chaetae,? = not given in literature description. Characters indicated in parentheses are rarely observed."httpUri="http://table.plazi.org/id/5378ECD9BC57B445F8A5FA2E10CEA7D7"pageId="0"pageNumber="1"tableUuid="5378ECD9BC57B445F8A5FA2E10CEA7D7">1</tableCitation>
