<documentid="5AAF0D5236EFB1E15BAEDA97B2EC4799"ID-DOI="10.3897/zookeys.1210.125990"ID-ZooBank="B158276E-7AC6-40AF-8713-0881D42F3953"ID-publisher-id="125990"URI-arpha="623FCD42-3006-5A97-92A2-6C9D7C9EE9FC"URI-zoobank="http://zoobank.org/B158276E-7AC6-40AF-8713-0881D42F3953"XM.bibliography_approvedBy="admin"XM.materialsCitations_approvedBy="admin"XM.taxonomicNames_approvedBy="admin"XM.treatmentCitations_approvedBy="admin"article-type="research-article"checkinTime="1724683991208"checkinUser="pensoft"docAuthor="Yodprasit, Kuntima, Buddhakala, Nopparat, Tasen, Wattanachai & Jaitrong, Weeyawat"docDate="2024"docId="5D5203100B0054B796CE127B6CAFD2F2"docLanguage="en"docName="ZooKeys 1210: 207-227"docOrigin="ZooKeys 1210"docSource="https://zookeys.pensoft.net/article/125990/download/xml/"docStyle="DocumentStyle:PensoftTaxPub.0000.journal_article.generic"docStyleName="PensoftTaxPub.0000.journal_article.generic"docTitle="Meranoplus siamensis Yodprasit & Jaitrong 2024, sp. nov."docType="treatment"docUuid="752DDF38-72E5-4325-9B3D-4C70BEEFA1DF"docUuidSource="ZooBank"docVersion="3"dtd-version="3.0"lastPageNumber="227"masterDocId="623FCD4230065A9792A26C9D7C9EE9FC"masterDocTitle="Two new species and a new record of the ant genus Meranoplus Smith, 1853 (Hymenoptera, Formicidae, Myrmicinae) from Thailand"masterLastPageNumber="227"masterPageNumber="207"pageNumber="207"updateTime="1724690887243"updateUser="admin">
<mods:titleid="797853C2678F672CE54690E46EA4CD30">Two new species and a new record of the ant genus Meranoplus Smith, 1853 (Hymenoptera, Formicidae, Myrmicinae) from Thailand</mods:title>
<mods:affiliationid="6BA21C1F74AC07E73AB050C0830AAA08">Division of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani, 12120 Thailand</mods:affiliation>
<mods:affiliationid="5163EE2A8AFA1E5DC28126442ABD51EC">Division of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani, 12120 Thailand & Office of Natural Science Research, National Science Museum, 39 Moo 3, Khlong 5, Khlong Luang, Pathum Thani, 12120, Thailand</mods:affiliation>
<taxonomicNameid="42536B95EA48993CF82E8670BAE908EA"authority="Yodprasit & Jaitrong"authorityName="Yodprasit & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="siamensis"status="sp. nov.">
<figureCitationid="DBA65E24152F1BBECC903051B6961140"captionStart="Figure 2"captionStartId="F2"captionText="Figure 2. Meranoplus siamensis sp. nov. (holotype, THNHM - I- 00027303) A head in full-face view B body in profile view C promesonotal shield in dorsal view D body in dorsal view."figureDoi="10.3897/zookeys.1210.125990.figure2"httpUri="https://binary.pensoft.net/fig/1121261">Figs 2 A – D</figureCitation>
,
<figureCitationid="CC2D58E3CE515C4D5C56526A88CEF4BF"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Characters used in key A, B, E Meranoplus tanomtongi (holotype, THNHM - I 00028903) F, G M. tanomtongi (non-type worker, THNHM - I- 00028904) C, D M. bicolor (non-type, THNHM - I- 00027270) H M. siamensis (holotype, THNHM - I- 00027303) I M. siamensis (non-type worker, THNHM - I- 00028942) A, C petiole and postpetiole in profile B, D petiole and postpetiole in dorsal view E, H anterior corners of frontal lobes F, I head in full-face view G eye."figureDoi="10.3897/zookeys.1210.125990.figure5"httpUri="https://binary.pensoft.net/fig/1121265">5 H – I</figureCitation>
,
<figureCitationid="9D2263FE46918C26FAFAB8AE256A40B3"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Characters used in key A Meranoplus siamensis (non-type worker, THNHM - I 00028942) B, F M. castaneus (non-type, THNHM - I- 00027323) C M. laeviventris (non-type, THNHM - I- 00027329) D, E M. bellii (lectotype, CASENT 0908933) G, H M. dlusskyi (in Zryanin 2015) I M. levis (holotype, CASENT 0902025) A eye B, C petiole and postpetiole in profile D, F, G, I mesosoma in profile E gaster in dorsal view H head in profile."figureDoi="10.3897/zookeys.1210.125990.figure6"httpUri="https://binary.pensoft.net/fig/1121266">6 A</figureCitation>
<materialsCitationid="682FA4F80DEE6952055588E1A700C098"collectedFrom="dry dipterocarp forest"collectingDate="2002-06-01"collectionCode="THNHM"collectorName="W. Jaitrong"country="Thailand"county="Ban Rai District"latitude="15.1225"location="Kaen Ma Kurd Village"longLatPrecision="7"longitude="99.2755"municipality="Kaen Ma Kurd Village"specimenCode="THNHM-I-00028919"specimenCount="1"specimenCount-worker="1"stateProvince="Uthai Thani Province">
<materialsCitationid="F47107855ECE6960D5C713BEEE573F95"collectedFrom="dry dipterocarp forest"collectingDate="2002-06-01"collectionCode="THNHM"collectorName="W. Jaitrong"country="Thailand"county="Ban Rai District"latitude="15.1225"location="Western"longLatPrecision="7"longitude="99.2755"municipality="Kaen Ma Kurd Village"specimenCode="THNHM-I-00028920, THNHM-I-00028940"specimenCount="21"specimenCount-worker="21"stateProvince="Uthai Thani">
<materialsCitationid="87662782EBF6B0B88ED5126134E855CB"collectedFrom="dry dipterocarp forest"collectingDate="2022-06-05"collectionCode="THNHM"collectorName="W. Jaitrong"country="Thailand"county="Wang Nam Kheao District"latitude="14.5031"location="Sakaerat Environmental Research Station"longLatPrecision="7"longitude="101.9368"municipality="Sakaerat Environmental Research Station"specimenCode="THNHM-I-00027315"specimenCount="7"specimenCount-worker="7"stateProvince="Nakhon Ratchasima Province">
<taxonomicNameid="E7CBC362C7EA203893A138AA37E22F51"authorityName="Yodprasit & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="siamensis"status="sp. nov.">
in full-face view subquadrate, slightly shorter than broad, with sides broadly convex, posterior margin distinctly convex, posterolateral corner bluntly angulate. Antennal scapes short, reaching level of posterior margin of compound eyes, apical half incrassate; antennal segment II slender, longer than each of segments III – VI, and almost as long as III + IV + V; segment VI broader than each of segments II – V. Clypeus roughly subrectangular, shorter than broad, its anterior margin feebly concave medially, while posterior clypeal margin almost straight. Mandibles subtriangular, masticatory margin with four teeth. Compound eyes large and convex when seen in full-face view, located laterally and well behind mid-length of head, with 8 or 9 ommatidia along longest axis, each facet hexagonal (Fig.
<figureCitationid="95E5C9C6264F7A881FDF70AA280C8511"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Characters used in key A Meranoplus siamensis (non-type worker, THNHM - I 00028942) B, F M. castaneus (non-type, THNHM - I- 00027323) C M. laeviventris (non-type, THNHM - I- 00027329) D, E M. bellii (lectotype, CASENT 0908933) G, H M. dlusskyi (in Zryanin 2015) I M. levis (holotype, CASENT 0902025) A eye B, C petiole and postpetiole in profile D, F, G, I mesosoma in profile E gaster in dorsal view H head in profile."figureDoi="10.3897/zookeys.1210.125990.figure6"httpUri="https://binary.pensoft.net/fig/1121266">6 A</figureCitation>
). Frontal lobes broad, its anterior corners right angled and lateral margin almost straight (Fig.
<figureCitationid="C0ABE8C4A4462D1CD8E67BA658AD2006"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Characters used in key A, B, E Meranoplus tanomtongi (holotype, THNHM - I 00028903) F, G M. tanomtongi (non-type worker, THNHM - I- 00028904) C, D M. bicolor (non-type, THNHM - I- 00027270) H M. siamensis (holotype, THNHM - I- 00027303) I M. siamensis (non-type worker, THNHM - I- 00028942) A, C petiole and postpetiole in profile B, D petiole and postpetiole in dorsal view E, H anterior corners of frontal lobes F, I head in full-face view G eye."figureDoi="10.3897/zookeys.1210.125990.figure5"httpUri="https://binary.pensoft.net/fig/1121265">5 H</figureCitation>
). Frontal carinae long reaching posterolateral corners of head.
in dorsal view, promesonotal shield distinctly shorter than broad, its lateral margin convex, serrate, margined and slightly overhanging mesosoma; lateral and posterior portions of promesonotal shield with translucent fins; posterior margin of promesonotal shield sinuate and distinctly concave; anterolateral corners of promesonotal shield bluntly angulate and posterolateral corners of promesonotal shield roundly angulate; promesonotal shield with two pairs of fenestrae laterally; metanotal groove absent. Declivity of propodeum almost invisible from above, mostly overhung by posterior margin of promesonotal shield (propodeal spines are visible in profile). Mesosoma in profile subquadrate, dorsal outline weakly convex, lateral face of mesosoma relatively flat; lateral portion of pronotum subtriangular; metapleuron not clearly demarcated from mesopleuron and lateral face of propodeum. Propodeal spines long and acute, longer than wide at its base, located at middle of propodeal declivity length.
in profile subquadrate, shorter than high; in dorsal view, distinctly shorter than broad, anterior margin weakly convex, posterior margin distinctly convex; dorsum of postpetiole somewhat flat, marginated with distinct ridge, posterior face convex.
<paragraphid="36609F367F66BBCEB80EF88491B745FE">Mandibles striate, shiny. Antennal scapes superficially striate. Head dorsally sparsely reticulate-rugulose laterally, while median portion weakly sculptured; half posterior portion of antennal scrobes shagreened mixed with few transverse ridges. Promesonotal shield more weakly sculptured than dorsum of head, with median portion smooth, shiny, and lacking any rugae; in profile, upper one-third portion of pronotum shagreened, while lower two-third portion with sparse irregular ridges; upper one-third portion of mesopleuron shagreened, lower two-thirds longitudinal weakly striate; metapleuron, and lateral faces of propodeum somewhat smooth and shiny. Propodeum declivity shagreened. Petiole smooth and shiny, postpetiole somewhat smooth but posterior face of postpetiole scabrous. First gastral tergite superficially shagreened with smooth and shiny interspaces.</paragraph>
</subSubSection>
<subSubSectionid="SECID0EOXAE"type="Pilosity and coloration">
<paragraphid="FDD269B1C6D96319840A30B5E64C8848">
<headingid="73FD6EB39F769CC50697E6BA09EBF2A8"reason="title">Pilosity and coloration.</heading>
</paragraph>
<paragraphid="F671CF166760EA74AD6ECABC4D9808F1">Dorsa of head and mesosoma with dense erect hairs mixed with sparse longer hairs; antennae with dense suberect hairs; in profile, lower two-thirds of pronotum with sparse suberect hairs; lower one-third of mesopleuron and metapleuron with sparse suberect hairs; area around propodeal spiracle with sparse suberect hairs; femora and tibiae with numerous long outstanding hairs as well; petiole with weakly sparse erect hairs on its anterior face and dorsum; postpetiole with dense long erect hairs, except anterior face without hairs; gaster with dense long erect hairs. Body mainly reddish brown; mandibles, antennae, legs, and tip of gaster yellowish brown.</paragraph>
<figureCitationid="17E00BB8B9D252C35321E264C4E55F98"captionStart="Figure 4"captionStartId="F4"captionText="Figure 4. Distribution of Meranoplus Thai species in Thailand."figureDoi="10.3897/zookeys.1210.125990.figure4"httpUri="https://binary.pensoft.net/fig/1121263">4</figureCitation>
<taxonomicNameid="6EE7BFE62DEA174A119C05117B632764"authorityName="Yodprasit & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="siamensis"status="sp. nov.">
<taxonomicNameid="B1B8A4150E5724047C5D47D7EF054B64"authorityName="Yodprasit & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi"status="sp. nov.">
in general appearance, having a pair of fenestrae along each lateral margin of the promesonotal shield, and having a subrectangular postpetiole when seen in profile. However,
<taxonomicNameid="49EB0C775205F1C64B5196DB80CBB339"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="siamensis">
<taxonomicNameid="960779883C41747E7EE71EE23EADE957"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi">
by: 1) anterior corners of frontal lobes right angled and lateral margin almost straight (round and lateral margin weakly convex in
<taxonomicNameid="37BEB037FCC118B81364F2B25D633456"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi">
<figureCitationid="C900374FDAB46B6665CD18E0766100B9"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Characters used in key A, B, E Meranoplus tanomtongi (holotype, THNHM - I 00028903) F, G M. tanomtongi (non-type worker, THNHM - I- 00028904) C, D M. bicolor (non-type, THNHM - I- 00027270) H M. siamensis (holotype, THNHM - I- 00027303) I M. siamensis (non-type worker, THNHM - I- 00028942) A, C petiole and postpetiole in profile B, D petiole and postpetiole in dorsal view E, H anterior corners of frontal lobes F, I head in full-face view G eye."figureDoi="10.3897/zookeys.1210.125990.figure5"httpUri="https://binary.pensoft.net/fig/1121265">5 E, H</figureCitation>
for comparison); 2) compound eyes with 8 or 9 ommatidia along longest axis, each facet hexagon (each facet round or elliptical in
<taxonomicNameid="520F0AFC48FA0B8AF070AB160E6D7B6A"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi">
<figureCitationid="33112B9773602C1FB036B82E39EFE084"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Characters used in key A, B, E Meranoplus tanomtongi (holotype, THNHM - I 00028903) F, G M. tanomtongi (non-type worker, THNHM - I- 00028904) C, D M. bicolor (non-type, THNHM - I- 00027270) H M. siamensis (holotype, THNHM - I- 00027303) I M. siamensis (non-type worker, THNHM - I- 00028942) A, C petiole and postpetiole in profile B, D petiole and postpetiole in dorsal view E, H anterior corners of frontal lobes F, I head in full-face view G eye."figureDoi="10.3897/zookeys.1210.125990.figure5"httpUri="https://binary.pensoft.net/fig/1121265">5 G</figureCitation>
,
<figureCitationid="EAF4D0F100D565C039D51027C79F5AA8"captionStart="Figure 6"captionStartId="F6"captionText="Figure 6. Characters used in key A Meranoplus siamensis (non-type worker, THNHM - I 00028942) B, F M. castaneus (non-type, THNHM - I- 00027323) C M. laeviventris (non-type, THNHM - I- 00027329) D, E M. bellii (lectotype, CASENT 0908933) G, H M. dlusskyi (in Zryanin 2015) I M. levis (holotype, CASENT 0902025) A eye B, C petiole and postpetiole in profile D, F, G, I mesosoma in profile E gaster in dorsal view H head in profile."figureDoi="10.3897/zookeys.1210.125990.figure6"httpUri="https://binary.pensoft.net/fig/1121266">6 A</figureCitation>
for comparison); 3) dorsum of head weakly sculptured (dorsum of head entirely and distinctly reticulate in
<taxonomicNameid="C8AB28AC33A3CC3FBA8FFB282D7BCBE6"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi">
<figureCitationid="66F4B648BFB7864C3C626C74BD0F3BDE"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Characters used in key A, B, E Meranoplus tanomtongi (holotype, THNHM - I 00028903) F, G M. tanomtongi (non-type worker, THNHM - I- 00028904) C, D M. bicolor (non-type, THNHM - I- 00027270) H M. siamensis (holotype, THNHM - I- 00027303) I M. siamensis (non-type worker, THNHM - I- 00028942) A, C petiole and postpetiole in profile B, D petiole and postpetiole in dorsal view E, H anterior corners of frontal lobes F, I head in full-face view G eye."figureDoi="10.3897/zookeys.1210.125990.figure5"httpUri="https://binary.pensoft.net/fig/1121265">5 F, I</figureCitation>
for comparison); 4) dorsum of postpetiole somewhat flat, marginated with distinct ridge (shallowly concave, marginated with distinct ridge in
<taxonomicNameid="6F7DF996FD1AD3A108B69E472326843B"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi">
); 5) entire head with dense short hairs mixed with sparse longer hairs (hairs along head margin clearly longer than hairs on middle of head in
<taxonomicNameid="60EE2A878B1264973036512FBE3CE4F1"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="tanomtongi">
<figureCitationid="E545E7BE4F284ECA9D4AB75ACB3AA0B0"captionStart="Figure 5"captionStartId="F5"captionText="Figure 5. Characters used in key A, B, E Meranoplus tanomtongi (holotype, THNHM - I 00028903) F, G M. tanomtongi (non-type worker, THNHM - I- 00028904) C, D M. bicolor (non-type, THNHM - I- 00027270) H M. siamensis (holotype, THNHM - I- 00027303) I M. siamensis (non-type worker, THNHM - I- 00028942) A, C petiole and postpetiole in profile B, D petiole and postpetiole in dorsal view E, H anterior corners of frontal lobes F, I head in full-face view G eye."figureDoi="10.3897/zookeys.1210.125990.figure5"httpUri="https://binary.pensoft.net/fig/1121265">5 F, I</figureCitation>
for comparison).
</paragraph>
<paragraphid="302C3A398B1E829FEA36B0707F8EDC91">
The type series of
<taxonomicNameid="B8F737C361D2250C0D3369C26CC4BA99"authorityName="Yodprasit & Buddhakala & Tasen & Jaitrong"authorityYear="2024"class="Insecta"family="Formicidae"genus="Meranoplus"kingdom="Animalia"order="Hymenoptera"phylum="Arthropoda"rank="species"species="siamensis"status="sp. nov.">
(TH 02 - WJT- 039). However, the two colonies have some variations: 1) compound eyes with 9 ommatidia along longest axis in the type series (8 ommatidia in colony no. TH 02 - WJT- 039); 2) promesonotal shield shorter than broad in the type series (almost as long as broad in colony no. TH 02 - WJT- 039); 3) posterior half of head with sparse and weak reticulation in the type series (dense distinct reticulations in colony no. TH 02 - WJT- 039); 4) propodeal declivity somewhat shagreened in the type series (smooth and shiny in colony no. TH 02 - WJT- 039); 5) first gastral tergite superficially shagreened with smooth and shiny interspaces in the type series (distinctly shagreened in colony no. TH 02 - WJT- 039). These characters are not clear enough to distinguish the two populations.
