identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
D8FBB0CC60065E98B77434D6FEBC2BF2.text	D8FBB0CC60065E98B77434D6FEBC2BF2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Listrura elongata Costa & Feltrin & Mattos & Vilardo & Katz 2025	<div><p>Listrura elongata sp. nov.</p><p>Figs 2, 3, 4, 5 A – C, Table 3</p><p>Holotype.</p><p>Brazil • 1 ex., 58.1 mm SL; Santa Catarina State: Camboriú Municipality: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-48.755833&amp;materialsCitation.latitude=-27.106112" title="Search Plazi for locations around (long -48.755833/lat -27.106112)">near the village of Cobra Fria and the road Estrada Morro do Gavião, in a stream tributary of the upper Rio Camboriú</a>; 27°06'22"S 48°45'21"W; about 50 m asl; 14 February 2023; C. R. M. Feltrin, leg.; UFRJ 14279 .</p><p>Paratypes.</p><p>(all from Santa Catarina State: Camboriú Municipality: Rio Camburiú basin): BRAZIL • 3 ex., 20.5–44.7 mm SL; collected with holotype; UFRJ 14281; 2 ex. (C &amp; S), 40.3–43.8 mm SL; idem; UFRJ 14280; 2 ex. (DNA), 20.2–22.2 mm SL; idem; UFRJ 13473; 2 ex., 26.5–34.8 mm SL; idem; CICCAA 05057; 1 ex., 49.0 mm SL; <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-48.75611&amp;materialsCitation.latitude=-27.092222" title="Search Plazi for locations around (long -48.75611/lat -27.092222)">stream close to the street Rua Manuel Maturino Anastácio</a>; 27°05'32"S, 48°45'22"W; about 30 m asl; 6 February 2023; A. M. Katz and P. J. Vilardo, leg.; UFRJ 13418 .</p><p>Diagnosis.</p><p>Listrura elongata is distinguished from all other congeners, except L. boticario, L. depinnai, and L. menezesi, by the absence of dorsal fin. Listrura elongata is immediately distinguished from L. boticarioi and L. depinnai, its two congeners of the subgenus Prolistrura lacking dorsal fin, by having a different colour pattern of flank, comprising the presence of minute dark brown dots on caudal peduncle and dorsal portion of flank that are smaller than the eye diameter (Fig. 2), vs. dark brown dots larger than the eye diameter (de Pinna and Wosiacki 2002: fig. 1; Villa-Verde et al. 2008, 2013). Listrura elongata is also distinguished from L. boticarioi, its hypothesised sister species (Fig. 1), by having more dorsal (38 vs. 28–30) and ventral (32 or 33 vs. 28) caudal procurrent rays, more interopercular odontodes (11–13 vs. eight), and a larger eye (eye diameter 8.5–11.5 % of heel length vs. 6.0 % of heel length). Listrura elongata also differs from L. depinnai by having more vertebrae (52 vs. 45 or 46), more interopercular odontodes (11–13 vs. four), and a slenderer body (body depth 8.9–11.3 % SL vs. 12.3–12.7 % SL, caudal peduncle depth 8.4–12.6 % SL vs. 14.2–14.5 % SL). Listrura elongata differs from L. menezesi of the subgenus Listrura by having more teeth in the premaxilla (20 or 21 vs. 15–18) and dentary (20 vs. 12–16), more dorsal caudal procurrent rays (38 vs. 28–30), and more interopercular odontodes (11–13 vs. five to seven).</p><p>Description.</p><p>External morphology. Morphometric data appear in Table 3. Body elongated, greatest body depth approximately at vertical through area midway distance between pectoral-fin base and anal-fin origin, trunk compressed, dorsal and ventral profiles almost straight (Figs 2, 4). Anus and urogenital papilla in shallow cavity immediately anterior to anal-fin base. Head slightly depressed, subtrapezoidal in dorsal view, anterior profile convex (Fig. 3). Minute skin papillae on anterior portion of ventral surface of head and lips. Eye small, round, positioned on anterior dorsal area of head, nearer snout tip than opercular patch of odontodes, separated by small interspace from posterior nostril (Fig. 3). Posterior nostril approximately equidistant from orbit and anterior nostril (Fig. 3). Mouth subterminal (Fig. 3). Branchial membrane attached to isthmus only at its middle anterior point (Fig. 3).</p><p>Barbels relatively long (Fig. 3); nasal barbel reaching between opercular patch of odontodes and area just anterior to it, maxillary barbel reaching between pectoral-fin base and area immediately anterior to it, rictal barbel reaching between posterior limit of interopercular patch of odontodes and pectoral-fin base. Jaw teeth pointed, arranged in two rows. Total premaxillary teeth 20 or 21, outer row 8, inner row 12 or 13; total dentary teeth 20, outer row 8 or 9, inner row 11 or 12. Odontodes pointed (Fig. 5 B). Opercular odontodes 6 or 7, interopercular odontodes 11–13. Branchiostegal rays 6. Cephalic latero-sensory system represented by short postorbital canal with 2 pores above opercular patch of odontodes, connected to short lateral line on anterior portion of trunk, with 1 or 2 pores.</p><p>Dorsal fin absent. Anal fin small, rounded, total anal-fin rays 8 (ii + 6). Pectoral fin narrow, total pectoral-fin rays 2 or 3, all segmented and unbranched, first ray longer, second ray about one-third to half first ray length, third ray when present rudimentary. Pelvic fin and girdle absent. Caudal fin spatula-shaped, total principal caudal-fin rays 13 (II + 9 + II), total dorsal procurrent rays 38 (xxxvii + I – II), total ventral procurrent rays 32 or 33 (xxxi – xxxii + I).</p><p>Osteology. Mesethmoid thin, abruptly widening posteriorly, with narrow and straight cornu (Fig. 5 A). Lacrimal nearly rectangular, with pronounced postero-lateral pointed expansion (Fig. 5 A). Sesamoid supraorbital small, elliptical (Fig. 5 A). Premaxilla broad, sub-triangular in dorsal view, with narrow lateral expansion (Fig. 5 A). Maxilla straight, relatively short, slightly shorter than premaxilla, tapering laterally (Fig. 5 A). Autopalatine sub-rectangular in dorsal view, lateral margin slightly concave, medial margin weakly sinuous (Fig. 5 B). Autopalatine postero-lateral process short, dorsally directed (Fig. 5 B). Autopalatine articular facet for mesethmoid wide, without distinctive processes (Fig. 5 B). Metapterygoid small, subtrapezoidal (Fig. 5 B). Quadrate slender, L-shaped, dorsal process small, with short posterior expansion (Fig. 5 B). Hyomandibula long, anterior outgrowth narrow, anteriorly tapering and terminating in sharp tip (Fig. 5 B). Hyomandibular articular facet for opercle robust, without distinctive ventral expansion (Fig. 5 B). Opercle and interopercle slender; transverse length of opercular odontode patch about half length of dorsal hyomandibular articulation for neurocranium, transverse length of interopercular odontode patch about three-fourths that length (Fig. 5 B). Preopercle narrow and long (Fig. 5 B). Parurohyal with narrow and pointed lateral process and moderate posterior process, its length about two-thirds of length between anterior margin of parurohyal and posterior process base (Fig. 5 C). Parurohyal head with prominent anterolateral paired process (Fig. 5 C). Middle foramen of parurohyal small, elliptical (Fig. 5 C). Vertebrae 52. Ribs 2 or 3. Caudal skeleton comprising two hypural plates in contact, dorsal plate corresponding to hypurals 3–5, ventral plate corresponding to hypurals 1–2 and parhypural. Anal-fin origin at vertical through centrum of 33 rd vertebra.</p><p>Colouration in alcohol. Dorsum, flank and head pale yellowish grey with minute dark brown dots irregularly arranged (Figs 2, 3). Dots smaller than eye diameter, on dorsum, dorsal portion of flank and caudal peduncle (Fig. 2). Slightly larger dots concentrated on longitudinal midline line of flank anterior to caudal peduncle, longitudinal line on dorsal portion of flank, central and anterior portions of dorsal surface of head, and opercular, interopercular, and branchiostegal regions (Figs 2, 3). Ventral surface of head and trunk yellowish white (Figs 2, 3). Dark brown chromatophores concentrated on chin and branchiostegal region (Fig. 3). Fins whitish hyaline, with minute brown chromatophores on anal-fin base and brown pigmentation on middle of caudal fin (Fig. 2).</p><p>Colouration in life. Similar to colouration in preserved specimens, with ground colour slightly darker (Fig. 4).</p><p>Etymology.</p><p>From the Latin elongata (elongate), referring to the slender and long body of the new species.</p><p>Distribution and habitat notes.</p><p>Listrura elongata is only known from the Rio Camboriú basin, an isolated small river basin in the Atlantic Forest of southern Brazil (Fig. 6). It was first found (i. e., a single specimen, UFRJ 13418) in the main channel of the upper Rio Camboriú, inside a plant remnant similar to a fern stem with earthy / clayey material attached to it. Ten days later, the same watercourse was intensively sampled, from 600 m above to 300 m below that collecting point, but no specimen was found, concluding that possibly the plant material was brought by a flood from some upstream tributary. Subsequently, about 15 different watercourses were investigated in neighbouring areas. The species was then found in a small stream tributary of the upper Rio Camboriú, the type locality (Fig. 7). It crosses a still forested segment at its right bank, but just below the type locality, the stream course reaches a deforested area occupied by cattle paddocks, which is followed by a large-scale rice plantation. The type locality is situated on a brief slope generating a weak water flow. The stream is about 100 cm wide and 1–35 cm deep, with clear water, except in eutrophicated areas, with great concentration of fungi and algae, where the water is turbid. There is a great concentration of amphibious herbs at the site where specimens were collected (Fig. 7). The second collecting point, the type locality, is about 1.5 km away from the first one. Further field studies in neighbouring river basins were unsuccessful in finding other populations of L. elongata (see discussion below).</p></div>	https://treatment.plazi.org/id/D8FBB0CC60065E98B77434D6FEBC2BF2	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.		Pensoft via Plazi	Costa, Wilson J. E. M.;Feltrin, Caio R. M.;Mattos, José L. O.;Vilardo, Paulo J.;Katz, Axel M.	Costa, Wilson J. E. M., Feltrin, Caio R. M., Mattos, José L. O., Vilardo, Paulo J., Katz, Axel M. (2025): Relationships of a new fossorial Microcambevinae catfish species from southern Brazil supporting multiple dorsal-fin losses in Listrura (Siluriformes, Trichomycteridae). Zoosystematics and Evolution 101 (3): 1177-1185, DOI: 10.3897/zse.101.139205
