{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T15:12:37Z","timestamp":1772118757777,"version":"3.50.1"},"reference-count":56,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2023,2,27]],"date-time":"2023-02-27T00:00:00Z","timestamp":1677456000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Morphology"],"published-print":{"date-parts":[[2023,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Representatives of the extant family Oenonidae (Annelida, Eunicida) have a prionognath jaw apparatus, with maxillae having forceps\u2010like elements, a number of asymmetrical dentate plates and long slender carriers, which is characteristic of some fossil forms known from the Paleozoic epoch. Therefore, data on the fine structure and functional morphology of Oenonidae jaws are helpful for the interpretation of fossil materials. The fine structure of the jaw apparatus and the ventral pharyngeal organ is studied in one species of the Oenonidae (Annelida)\u2014\n                    <jats:italic>Drilonereis<\/jats:italic>\n                    cf.\n                    <jats:italic>filum<\/jats:italic>\n                    . The material was collected in the soft bottom of Marseille Bay (Mediterranean) and examined with the help of TEM and histological techniques. A three\u2010dimensional (3D) reconstruction was made from a complete series of semithin sections. The entire jaw apparatus is about 500\u2009\u00b5m in length; it includes ventral mandibles and four pairs of maxillae, connected with long paired dorsal carriers and an unpaired ventral carrier. While retracted, it reaches the VIII\u2212XI chaetigers. The most solid part of the maxillary apparatus, that is, maxillae I and II, are 2.5\u22125\u2009\u00b5m thick. The plate consists of a monolithic array of merged scleroprotein granules in which perforations, that is, spaces remaining from microvilli, are visible; the basal part of the maxillary plate is a layer of loosely arranged collagen fibers penetrated with microvilli and has no signs of sclerotization. A study of the jaws of\n                    <jats:italic>Drilonereis<\/jats:italic>\n                    cf.\n                    <jats:italic>filum<\/jats:italic>\n                    showed the presence of common jaw patterns in Eunicida order. Like the jaws of Dorvilleidae, Eunicidae, Onuphidae, and Lumbrineridae, the jaws of\n                    <jats:italic>Drilonereis<\/jats:italic>\n                    are formed at the basis of a typical annelid cuticle's transformation with epi\u2010 and basicuticular layers, and its impregnation by merging scleroprotein granules. Through the nature of sclerotization, the jaws of\n                    <jats:italic>D<\/jats:italic>\n                    . cf.\n                    <jats:italic>filum<\/jats:italic>\n                    are similar to those of Dorvilleidae, Histriobdellidae, and the juvenile jaws of\n                    <jats:italic>Mooreonuphis stigmatis<\/jats:italic>\n                    (Onuphidae). Analysis of the 3D\u2010reconstructions of the\n                    <jats:italic>D<\/jats:italic>\n                    . cf.\n                    <jats:italic>filum<\/jats:italic>\n                    jaw apparatus shows that the MxI of this species, and probably of other Oenonidae with dorsal and ventral carriers, can make grasping motions by fixing the joint of the right and left MxI in the two\u2010door hinge type. In general, the overall structure of the jaw apparatus of\n                    <jats:italic>D<\/jats:italic>\n                    . cf.\n                    <jats:italic>filum<\/jats:italic>\n                    and the mechanics of its work shows greater similarity with that of Dorvilleidae than with the jaw apparatus of extant Labidognatha and Simmetrognatha (Onuphidae, Eunicidae, Lumbrineridae). The need for compactization of the jaw apparatus when moving in dense sediment or in the burrows is probably one of the factors determining its structure.\n                  <\/jats:p>","DOI":"10.1002\/jmor.21568","type":"journal-article","created":{"date-parts":[[2023,2,14]],"date-time":"2023-02-14T14:23:20Z","timestamp":1676384600000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Jaw morphology and function in\n                    <i>Drilonereis<\/i>\n                    cf.\n                    <i>filum<\/i>\n                    (Oenonidae, Annelida)"],"prefix":"10.1002","volume":"284","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9158-0810","authenticated-orcid":false,"given":"Alexander","family":"Tzetlin","sequence":"first","affiliation":[{"name":"Biological Faculty M. V. Lomonosov Moscow State University Moscow Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8163-2733","authenticated-orcid":false,"given":"Elena","family":"Vortsepneva","sequence":"additional","affiliation":[{"name":"Biological Faculty M. V. Lomonosov Moscow State University Moscow Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anna","family":"Zhadan","sequence":"additional","affiliation":[{"name":"Biological Faculty M. V. Lomonosov Moscow State University Moscow Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,2,27]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1139\/z66-085"},{"key":"e_1_2_9_3_1","first-page":"353","volume-title":"Handbook of zoology, annelida, volume 3: sedentaria III, errantia I","author":"Budaeva N.","year":"2021"},{"key":"e_1_2_9_4_1","first-page":"99","article-title":"Censimento dei policheti dei mari italiani: Arabellidae Hartman, 1944, Oenonidae Kinberg, 1865","volume":"103","author":"Cantone G.","year":"1996","journal-title":"Atti Della Societ\u00e0 Toscana Di Scienze Naturali, Memorie, Serie B"},{"key":"e_1_2_9_5_1","first-page":"313","article-title":"Les ann\u00e9lides ch\u00e9topodes du Golfe de Naples","volume":"19","author":"Clapar\u00e8de \u00c9.","year":"1868","journal-title":"M\u00e9moires de La Soci\u00e9t\u00e9 de Physique et d'Histoire Naturelle de Gen\u00e8ve"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1086\/696291"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.2307\/1485632"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1502-3931.1986.tb00750.x"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.2307\/1485613"},{"key":"e_1_2_9_10_1","first-page":"485","article-title":"On the chemical composition of fossil polychaete jaws","volume":"54","author":"Colbath G. 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