נאוקנוס

קריאת טבלת מיוןנאוקנוס
איור של נאוקנוס
תקופה
פליסטוקן-הולוקן
מיון מדעי
ממלכה: בעלי חיים
מערכה: מיתרניים
על־מחלקה: בעלי ארבע רגליים
מחלקה: יונקים
סדרה: פילוסאים
תת־סדרה: עצלנאים
משפחה: עצלני דו-אצבע
סוג: נאוקנוס
שם מדעי
Neocnus
ארדונדו, 1961
לעריכה בוויקינתונים שמשמש מקור לחלק מהמידע בתבנית

נאוקנוס (שם מדעי: Neocnus; מילולית: "עצלן חדש") הוא סוג נכחד של עצלן קרקע ממשפחת עצלני דו-אצבע שחי באיים קובה והיספניולה בסוף הפליסטוקן ואף בתחילת ההולוקן. שני מינים נמצאו בסוג זה.[1]

עצלן קרקע זה היה קרוב משפחתו של המגלוניקס שחי ביבשת אמריקה הצפונית אך היה קטן ממנו בהרבה. כמו כן, הוא היה קרוב לעצלני הקריביים שהיגרו לאיים אלה מאמריקה הדרומית.

הנאוקנוס היה קטן מספיק בכדי לטפס על עצים, בשונה מרוב עצלני הקרקע, וככל הנראה ניזון מעלים[2]. היו לו זרועות ארוכות בעלות זוג טפרים חדים, צלעות גדולות וזנב ארוך וחזק יחסית וייתכן שהוא יכול היה לעמוד זקוף. שיני העצלן היו קצרות ומשולשות ולסתו שרירית.

מאובני הנאוקנוס התגלו לראשונה ב-1961 בכמה מערות בהאיטי, והם מתוארכים לתקופה שלפני כ-5,000 שנה. ככל הנראה נכחד סוג זה, בדומה לעצלני קרקע קריביים אחרים, בידי האדם שצד אותו לבשרו.[3]

קישורים חיצוניים

ויקישיתוף מדיה וקבצים בנושא נאוקנוס בוויקישיתוף

הערות שוליים

  1. ^ www.itis.gov
  2. ^ www.tandfonline.com
  3. ^ David W. Steadman, Paul S. Martin, Ross D. E. MacPhee, A. J. T. Jull, H. Gregory McDonald, Charles A. Woods, Manuel Iturralde-Vinent, Gregory W. L. Hodgins, Asynchronous extinction of late Quaternary sloths on continents and islands, Proceedings of the National Academy of Sciences of the United States of America 102, 2005-08-16, עמ' 11763–11768 doi: 10.1073/pnas.0502777102

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