identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03CC3F276D28EB17FF4837B2FD80FDB4.text	03CC3F276D28EB17FF4837B2FD80FDB4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Catasetum humaitaense Krahl, D. R. P. Krahl, Schmal & Cantuaria	<div><p>Catasetum × humaitaense Krahl, D.R.P.Krahl, Schmal &amp; Cantuária nothosp. nov.</p><p>Diagnosis: Catasetum × humaitaense hybrida naturalis inter C. boyi et C. ivanae cum characteribus intermediis est. inflorescentia arcuatis et descendentibus, flores pallidi sparsim brunneomaculati, sepala oblongo-elliptica, petala elliptica, labelum ovatum subtrilobatum margine irregulariter denticulum cum duobus callis in loborum lateralium basi.</p><p>Type. BRAZIL. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-62.710144&amp;materialsCitation.latitude=-6.772808" title="Search Plazi for locations around (long -62.710144/lat -6.772808)">Amazonas</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-62.710144&amp;materialsCitation.latitude=-6.772808" title="Search Plazi for locations around (long -62.710144/lat -6.772808)">Humaitá</a>, Madeira River, Carapanatuba Lake, igapó forest, 6°46´22.11´´ S-62 °42´36.51´´W, 33 m a.s.l., 23 march 2023, R. R. P . Nascimento ex A. H . Krahl &amp; P . Schmal 1690 ♂ (holotype: HUAM012581!) .</p><p>Description. Epiphytic caespitose plant. Roots fasciculate, filiform, whitish, ca. 0.4-0.5 cm diam. Rhizome inconspicuous. Stem swollen into a pseudobulb, 6.4-7.9 × 1.9-2.5 cm, fusiform, covered by leaf sheaths, multi-leaved, greenish. Leaves 7.1- 16.6 × 2.5-3.9 cm, oblanceolate, plicate, abaxially clearly 5-6-nerved, entire and slightly undulate margin, acute apex, green. Staminate inflorescence 8.2-9.9 cm long, lateral, racemose, arched descending, 5-6-flowered; peduncle 0.2-0.3 cm long, cylindrical, greenish becoming purplish towards apex; bracts at the peduncle base 0.6-0.7 cm long, amplective, entire margin, acute apex, greenish; floral bract 0.8-0.9 × 0.3-0.4 cm, lanceolate, concave, symmetrical, entire margin, acute apex, greenish. Staminate flowers light green with brown-spotted, spaced by about ca. 1 cm, resupinate, pedicelled; pedicel 1.6-1.8 cm long, cylindrical, sinuous, brownish; sepals 2.5-2.8 × 0.9-1.1 cm, ellipticlanceolate, involute, symmetrical, entire margin, acute apex; petals 2.2-2.4 × 0.8-0.9 cm, ellipticlanceolate, slightly revolute at base, symmetrical, entire margin, acute apex; lip 1.2-1.4 × 1.0- 1.1 cm, ovate, subtrilobed, tough and fleshy, with an ovoid bottom ca. 0.5-0.6 cm deep and two discreet calli at the base of the lateral lobes; calli 0.1-0.2 × 0.1-0.2 cm, transversely laminar, obtuse; lateral lobes 0.5-0.6 × 0.7-0.8 cm, semi-ovate, irregularly denticulated margin; apical lobe 0.5-0.6 × 0.7-0.8 cm, deltoid, discreetly denticulated margin, obtuse and revolute apex; column 1.8-2.0 cm long, oblanceoloid, thick, contracted at base, rostrate apex, greenish with brown-spotted; antennae 0.6-0.7 cm long, filiform, symmetrical, convergent, brownish; anther cap 0.6- 0.7 × 0.3-0.4 cm, subtriangular, purplish brown, rostrate apex; viscidium ca. 0.1 × 0.1 cm, rounded, sticky; stipe ca. 0.3 × 0.1 cm, blade-shaped, rolled, yellowish; pollinia 2, 0.1-0.2 × 0.1 cm, oblong, hard, sulcate, compressed, yellowish. Pistillate and staminate + pistillate inflorescences not seen. Fruit not seen.</p><p>Etymology. The specific epithet refers to the name of the municipality of Humaitá (Amazonas, Brazil), where the new nothospecies was found.</p><p>Distribution, habitat and ecology. The new nothospecies flowered in cultivation during March, a period that corresponds to the rainy season in the Brazilian Amazon (Braga, 1977). It is currently known only from the type locality: Lake Carapanatuba, situated in the municipality of Humaitá, Amazonas state, Brazil (Figure 2). The species was observed growing epiphytically on thin tree branches in igapó forest, a typical Amazonian environment subject to seasonal flooding. Field observations indicate that C. × humaitaense grows in sympatry with one of its putative parental species, C. ivaneae, and both share the same locality (see Petini-Benelli,2016b; vouchers: CNMT6768!, CNMT6769! and RB01017642!). This type of flooded habitat is also known to support other congeneric nothospecies, such as C. × sheyllae Krahl, Cantuária &amp; J.B.F.Silva, recently described from the state of Pará (Cantuária et al., 2021).</p></div>	https://treatment.plazi.org/id/03CC3F276D28EB17FF4837B2FD80FDB4	Public Domain	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.		Plazi	Krahl, Dayse R. P.;de Oliveira, Miguel S.;Schmal, Philippe;da Silva, João B. F.;Chiron, Guy;Krahl, Amauri H.;Cantuária, Patrick de C.	Krahl, Dayse R. P., de Oliveira, Miguel S., Schmal, Philippe, da Silva, João B. F., Chiron, Guy, Krahl, Amauri H., Cantuária, Patrick de C. (2025): Catasetum × humaitaense (Orchidaceae: Catasetinae), a new nothospecies from the Brazilian Amazon. Biota Colombiana 26: 1-14, DOI: 10.21068/2539200X.1263, URL: https://doi.org/10.21068/2539200X.1263
03CC3F276D2AEB14FF48356BFD3CF832.text	03CC3F276D2AEB14FF48356BFD3CF832.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Catasetum Rich.	<div><p>Key to the species and nothospecies of Catasetum with symmetrical and convergent antennae from the state of Amazonas, Brazil</p><p>1. Non-resupinate flowers……….…… C. kraenzlinianum</p><p>1’. Resupinate flowers………………..…...…...……………….2</p><p>2. Lip trilobed or subtrilobed………………….………….……3</p><p>2’. Lip entire…………………………………………..……………….4</p><p>3. Mid-lobe of the lip deltoid with a small acute callus……………….…………………..….…………… C. × sheyllae</p><p>3’. Mid-lobe of the lip oval and devoid of callosity………………………………….…... C. × humaitanense</p><p>4. Lip with fimbriae…………………………….…………………..5</p><p>4’. Lip without fimbriae…………………………….…………...7</p><p>5. Lip oblong………………………….…………………... C. krahlii</p><p>5’. Lip triangular, subtriangular or ovoid……….....…….6</p><p>6. Lip ovoid and densely fimbriated……………………….……... C. reichenbachianum</p><p>6’. Lip triangular to subtriangular with a sparsely fimbriate margin that is concentrated at the apex…………………………………………………..… C. rivularium</p><p>7. Margin of the lip crenate or denticulate……..………………………....…………… C. ivaneae</p><p>7’. Margin of the lip smooth………………………...…..……8</p><p>8. Lip oblong to lingulate………………….…….. C. tigrinum</p><p>8’. Lip obovate to oval or triangular to deltoid…...….9</p><p>9. Inflorescence arched to pendent; lip deeply concave; apex of lip without callus…………………..….…………………..………… C. pulchrum</p><p>9’. Inflorescence erect to arched; lip relatively flat with a slight depression near the base; apex of lip with callus………………………………………………………….…10</p><p>10. Apex of the lip ending in an obtuse to truncated callus...………..………………………………….... C. tenebrosum</p><p>10’. Apex of the lip ending in an acute callus…...………………………….....………………….. C. sophiae</p></div>	https://treatment.plazi.org/id/03CC3F276D2AEB14FF48356BFD3CF832	Public Domain	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.		Plazi	Krahl, Dayse R. P.;de Oliveira, Miguel S.;Schmal, Philippe;da Silva, João B. F.;Chiron, Guy;Krahl, Amauri H.;Cantuária, Patrick de C.	Krahl, Dayse R. P., de Oliveira, Miguel S., Schmal, Philippe, da Silva, João B. F., Chiron, Guy, Krahl, Amauri H., Cantuária, Patrick de C. (2025): Catasetum × humaitaense (Orchidaceae: Catasetinae), a new nothospecies from the Brazilian Amazon. Biota Colombiana 26: 1-14, DOI: 10.21068/2539200X.1263, URL: https://doi.org/10.21068/2539200X.1263
