page_title: List of the Cenozoic life of Texas
section_title: M
hierarchical_section_title: List of the Cenozoic life of Texas / M
caption_attribution_description: English: Microdrillia fastosa (Hedley, 1907)&#160;; family Borsoniidae
context_page_description: This list of the Cenozoic life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas and are between 66 million and 10,000 years of age.
context_section_description: †Machairodus
  †Machairodus catocopis
  Macrocallista
  †Macrocallista triangulata – type locality for species
  †Macrotarsius
  †Macrotarsius jepseni – or unidentified comparable form
  Mactra
  Madracis
  †Madracis gregorioi
  †Madracis herricki – type locality for species
  †Madracis johnsoni – type locality for species
  Madrepora
  †Madrepora natchitochensis
  Magnolia
  †Magnolia leei
  †Mahgarita
  †Mahgarita stevensi – type locality for species
  †Malaquiferus – tentative report
  †Mammut
  †Mammut americanum
  †Mammuthus
   †Mammuthus columbi
  †Mammuthus hayi
  Marginella
  †Marginella carnea
  †Marginella constrictoides
  Marmota
  †Marmota flaviventris
  †Marshochoerus
  †Marshochoerus socialis
  Martes
  Martesia
  †Martesia laredoensis
  †Martesia texana
  †Martinogale
  †Martinogale chisoensis
  †Mathilda
  †Mathilda claibornensis
  †Mathilda cribraea – type locality for species
  †Mathilda iugum – type locality for species
  †Mathilda retisculpta
  †Mauricia
  †Mauricia houstonia
  †Mauricia leonia
  †Mazzalina
  †Mazzalina conica – type locality for species
  †Mazzalina plena
  †Megalictis – tentative report
  †Megalonyx
  †Megalonyx jeffersonii – or unidentified comparable form
  †Megalonyx leptostomus
   †Megatherium
  †Megatherium mirabite
  †Megatylopus
  †Megatylopus matthewi – type locality for species
  †Megatylopus primaevus
  Melanella
  †Melanella extremis – or unidentified related form
  †Melanella minutissima – type locality for species
  †Melanella notata – or unidentified comparable form
  †Melanella wheeleri
  †Meliakrouniomys
  †Meliakrouniomys wilsoni – type locality for species
  Meliosma
  †Meliosma berryi – type locality for species
  †Menetus
  †Menetus dilataus
   †Menoceras
  †Menoceras barbouri
  †Menops
  †Menops bakeri
  Mephitis
  †Mephitis mephitis
  Meretrix
  †Meretrix nuttelliopsis
  †Merychippus
  †Merychippus gunteri
  †Merychippus insignis – or unidentified comparable form
  †Merychippus sejunctus
  †Merychippus shirleyae
  †Merychyus
  †Merychyus calaminthus – or unidentified comparable form
  †Merychyus novomexicanus
   †Merycoidodon
  †Merycoidodon culbertsoni
  †Merycoidodon presidioensis
  Mesalia
  †Mesalia alabamiensis
  †Mesalia allentonensis
  †Mesalia biplicata
  †Mesalia claibornensis
  †Mesalia mavericki
  †Mescalerolemur – type locality for genus
  †Mescalerolemur horneri – type locality for species
  Mesodesma
  †Mesodesma singleyi
  †Mesodma
  †Mesodma pygmaea – or unidentified comparable form
  †Mesodma thompsoni
  †Mesohippus
  †Mesohippus texanus
  †Mesomphix
  †Metalopex
  †Metalopex bakeri – type locality for species
   †Metamynodon
  †Metamynodon chadronensis
  †Metamynodon mckinneyi – type locality for species
  Metula
  †Metula brazosensis
  †Metula elongatoides – type locality for species
  †Metula gracilis
  †Metula reticulata – type locality for species
  †Michela
  †Michela trabeatoides – type locality for species
  †Michenia
  †Michenia exilis – type locality for species
   Microdrillia
  †Microdrillia aldrichella
  †Microdrillia aldrichiella
  †Microdrillia elongatula
  †Microdrillia harrisi
  †Microdrillia infans
  †Microdrillia laeviplicata
  †Microdrillia parthenoides
  †Microdrillia robustula – or unidentified related form
  †Microdrillia rostratula
  †Microdrillia solidula
  †Microeutypomys
  †Microeutypomys karenae – type locality for species
  †Microparamys
  †Microparamys minutus
  †Microparamys perfossus
   Micropterus
  †Microsurcula
  †Microsurcula iuventae – type locality for species
  †Microsyops
  †Microsyops annectens
  †Microtomarctus
  †Microtomarctus conferta
  Microtus
  †Microtus australis
  †Microtus llanensis
  †Microtus meadensis
  †Microtus mexicanus
  †Microtus paroperarius
  †Microtus pennsylvanicus
  †Microtus pinetorum
  Micrurus
   †Micrurus fulvius
  Mictomys
  †Mictomys meltoni
  Miltha
  †Miltha albaripus
  †Mimetodon
  †Mimetodon silberlingi
  †Minippus
  †Minippus index
  †Mioclaenus
  †Mioclaenus opisthacus
  †Miocoluber – type locality for genus
  †Miocoluber dalquesti – type locality for species
  †Miocyon
  †Miocyon scotti – or unidentified comparable form
  †Miocyon vallisrubrae
  †Miohippus
  †Miolabis
  †Mionictis
   †Miracinonyx
  †Miracinonyx inexpectatus – or unidentified comparable form
  †Miracinonyx studeri
  Mitrella
  †Mitrella bastropensis
  †Mitrella nuttalli – type locality for species
  †Mitrella texana – type locality for specie
caption: Shell in multiple views of a Microdrillia sea snail
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