{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T07:00:15Z","timestamp":1789369215894,"version":"build-2803163510"},"reference-count":41,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2011,9,30]],"date-time":"2011-09-30T00:00:00Z","timestamp":1317340800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Morphology"],"published-print":{"date-parts":[[2012,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We examined the mandibles of 377 individuals representing 25 species, 12 genera, 5 tribes, and 2 subfamilies of the Loricariidae, a species\u2010rich radiation of detritivorous\u2013herbivorous neotropical freshwater fishes distinguished by having a ventral oral disk and jaws specialized for surface attachment and benthic feeding. Loricariid mandibles are transversely oriented and bilaterally independent, each rotating predominantly around its long axis, although rotational axes likely vary with mandibular geometry. On each mandible, we measured three traditional and three novel morphological parameters chosen primarily for their functional relevance. Five parameters were linear distances and three of these were analogous to traditional teleost in\u2010 and out\u2010levers for mandibular adduction. The sixth parameter was insertion area of the combined adductor mandibulae muscle (AM<jats:sub>area<\/jats:sub>), which correlated with adductor mandibulae volume across a subset of taxa and is interpreted as being proportional to maximum force deliverable to the mandible. Multivariate analysis revealed distributions of phylogenetically diagnosed taxonomic groupings in mandibular morphospace that are consistent with an evolutionary pattern of basal niche conservatism giving rise to multiple adaptive radiations within nested clades. Correspondence between mandibular geometry and function was explored using a 3D model of spatial relationships among measured parameters, potential forces, and axes of rotation. By combining the model with known loricariid jaw kinematics, we developed explicit hypotheses for how individual parameters might relate to each other during kinesis. We hypothesize that the ratio [AM<jats:sub>area<\/jats:sub>\/tooth row length<jats:sup>2<\/jats:sup>] predicts interspecific variation in the magnitude of force entering the mandible per unit of substrate contacted during feeding. Other newly proposed metrics are hypothesized to predict variation in aspects of mandibular mechanical advantage that may be specific to Loricariidae and perhaps shared with other herbivorous and detritivorous fishes. 2011. \u00a9 2011Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/jmor.11003","type":"journal-article","created":{"date-parts":[[2011,9,30]],"date-time":"2011-09-30T12:22:26Z","timestamp":1317385346000},"page":"24-39","source":"Crossref","is-referenced-by-count":48,"title":["Morphological and functional diversity of the mandible in suckermouth armored catfishes (Siluriformes: Loricariidae)"],"prefix":"10.1002","volume":"273","author":[{"given":"Nathan K.","family":"Lujan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan W.","family":"Armbruster","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2011,9,30]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1086\/594378"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1523-1739.2010.01568.x"},{"key":"e_1_2_6_4_1","first-page":"253","article-title":"Comparative functional morphology of the mouthparts of stream animals feeding on epilithic algae","volume":"83","author":"Arens W","year":"1989","journal-title":"Arch f\u00fcr Hydrobiol"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1139\/z90-269"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439-0469.1994.tb00490.x"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1096-3642.2004.00109.x"},{"key":"e_1_2_6_8_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.11646\/zootaxa.1822.1.1","article-title":"The genus Peckoltia with the description of two new species and a reanalysis of the phylogeny of the genera of the Hypostominae (Siluriformes: Loricariidae)","volume":"1822","author":"Armbruster JW","year":"2008","journal-title":"Zootaxa"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1095-8649.2001.tb00534.x"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/jmor.1052100306"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1590\/S0034-71082001000100005"},{"key":"e_1_2_6_12_1","unstructured":"GeerinckxT.2006.Ontogeny and functional morphology of a highly specialized trophic apparatus: A case study of neotropical suckermouth armoured catfishes (Loricariidae Siluriformes). D. Phil. Thesis University of Gent Gent Belgium."},{"key":"e_1_2_6_13_1","first-page":"47","article-title":"A head with a suckermouth: A functional\u2010morphological study of the head of the suckermouth catfish Ancistrus cf. triradiatus (Loricariidae, Siluriformes)","volume":"137","author":"Geerinckx T","year":"2007","journal-title":"Belg J Zool"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/jmor.10547"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00360-009-0381-1"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-7998.1978.tb03282.x"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1095-8312.1983.tb01596.x"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00442-005-0202-5"},{"key":"e_1_2_6_19_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00349695"},{"key":"e_1_2_6_20_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1095-8312.2007.00893.x"},{"key":"e_1_2_6_21_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00001991"},{"key":"e_1_2_6_22_1","first-page":"53","article-title":"Chaetostoma vasquezi, nueva especie de corroncho del Escudo de Guyana, estado Bol\u00edvar, Venezuela (Siluroidei: Loricariidae): Descripci\u00f3n y consideraciones biogeogr\u00e1ficas","volume":"57","author":"Lasso CA","year":"1997","journal-title":"Memoria Sociedad de Ciencias Naturales La Salle"},{"key":"e_1_2_6_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-5193(82)90276-4"},{"key":"e_1_2_6_24_1","unstructured":"LujanNK.2009.Jaw morpho\u2010functional diversity trophic ecology and historical biogeography of the neotropical suckermouth armored catfishes (Siluriformes Loricariidae). Ph.D. Dissertation Auburn University Auburn AL."},{"key":"e_1_2_6_25_1","doi-asserted-by":"crossref","unstructured":"LujanNK GermanDP WinemillerKO.2011.Do wood grazing fishes partition their niche? Morphological and isotopic evidence for trophic segregation in neotropical Loricariidae. Funct Ecol published online 1 July 2011.","DOI":"10.1111\/j.1365-2435.2011.01883.x"},{"key":"e_1_2_6_26_1","doi-asserted-by":"publisher","DOI":"10.1590\/S1679-62252004000100006"},{"key":"e_1_2_6_27_1","doi-asserted-by":"publisher","DOI":"10.1051\/alr:2008032"},{"key":"e_1_2_6_28_1","doi-asserted-by":"publisher","DOI":"10.5962\/bhl.part.79851"},{"key":"e_1_2_6_29_1","unstructured":"Rapp Py\u2010DanielL.1997.Phylogeny of the neotropical armored catfishes of the subfamily Loricariinae (Siluriformes: Loricariidae). D. Phil. 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