Halszkaraptorinae Cau et al. 2017

Halszkaraptorinae Cau et al., 2017 Revised diagnosis. Small dromaeosaurids that possess dorsoventrally flattened premaxillae, premaxillary bodies perforated by many neurovascular foramina, enlarged and closely packed premaxillary teeth that utilized delayed replacement patterns, reduced anterior maxillary teeth, dorsolateral placement of retracted external nares, greatly elongated cervical vertebrae, anterior cervical vertebrae with round lobes formed by the postzygapophyses, horizontal zygapophyses, and pronounced zygapophyseal laminae in the anterior caudal vertebrae, mediolaterally compressed ulnae with sharp posterior margins, second and third metacarpals with similar thicknesses, shelf-like supratrochanteric processes on the ilia, elongated fossae that border posterolateral ridges on the posterodistal surfaces of the femoral shafts, and third metatarsals in which the proximal halves are unconstricted and anteriorly convex.
Published as part of Lee, Sungjin, Lee, Yuong-Nam, Currie, Philip J., Sissons, Robin, Park, Jin-Young, Kim, Su-Hwan, Barsbold, Rinchen & Tsogtbaatar, Khishigjav, 2022, A non-avian dinosaur with a streamlined body exhibits potential adaptations for swimming, pp. 1-9 in Communications Biology 5 (1) on page 2, DOI: 10.1038/s42003-022-04119-9, http://zenodo.org/record/7390392
{"references":["4. Cau, A. et al. Synchrotron scanning reveals amphibious ecomorphology in a new clade of bird-like dinosaurs. Nature 552, 395 - 399 (2017)."]}