Friends of the UMMP Michigan Basin Specimen Database

Currently showing records 121 - 131 of 131 total

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More Info	Image	Taxa	Strat Unit	Contributor
		Callixylon newberryi	Alpena formation	Michael Lask
	Submitted on 2014-10-04 by Michael Lask Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: About 240 mm across, this roughly 15 pound tree stump was collected b Patricia Rutkowski from the Antrim Shale of the Paxton Quarry. Callixylon Newberryi is a primitive conifer that dates back to the late Devonian Period, which is considered the time period when trees first evolved. The Callixylon is a member of the extinct order of tree like plants named Archaeopteridales. These plants with fern like leaves are estimated to be 350 to 375 Million years old making them among the worlds oldest trees. These tree like plants had leaves similar to ferns. For many years scientists classified Archaeopteris as a separate genus than Callixylonin under the order of Archaeopteridales. In the 1960s, paleontologists were able to demonstrate that the fossil wood known as Callixylon and the petrified fern leaf imprints known as Archaeopteris were actually part of the same plant. This plant no matter what it is called has turned out to be the link between trees and ferns. Photo title: Plant Taxa present: Callixylon newberryi View full record
		Callixylon newberryi	Alpena formation	Michael Lask
	Submitted on 2014-10-04 by Michael Lask Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: Collected by Patricia Rutkowski from the Antrim Shale of the Paxton Quarry, the specimen is 303 mm long. Callixylon Newberryi is a primitive conifer that dates back to the late Devonian Period, which is considered the time period when trees first evolved. The Callixylon is a member of the extinct order of tree like plants named Archaeopteridales. These plants with fern like leaves are estimated to be 350 to 375 Million years old making them among the worlds oldest trees. These tree like plants had leaves similar to ferns. For many years scientists classified Archaeopteris as a separate genus than Callixylonin under the order of Archaeopteridales. In the 1960s, paleontologists were able to demonstrate that the fossil wood known as Callixylon and the petrified fern leaf imprints known as Archaeopteris were actually part of the same plant. This plant no matter what it is called has turned out to be the link between trees and ferns. Photo title: Plant Taxa present: Callixylon newberryi View full record
		Dolatocrinus stellifer	Alpena formation	Sally Labadie
	Submitted on 2014-11-22 by Sally Labadie Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: This very good specimen measures 43mm in diameter and 37mm high. It is from the Northern Aggregates Quarry in Alpena. The photo shows three views, the anal, basal and side views. Photo title: CRINOID CALYX Taxa present: Dolatocrinus stellifer View full record
		Pithocrinus cooperi	Alpena formation	Margi Chriscinske
	Submitted on 2014-11-22 by Margi Chriscinske Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: A fine specimen showing spines on the tegmen and anal plates. Many stubs of broken spines are visible. The calyx measuring 42mm in diameter and 36mm in height has some matrix attached. The two views show an angled view of the anal and side view with the basal view to the right. Photo title: CRINOID CALYX SHOWING SPINES Taxa present: Pithocrinus cooperi View full record
		Striatopora rugosa	Four Mile Dam formation	Joseph Koniecki
	Submitted on 2018-12-13 by Joseph Koniecki Location (approximate): Alpena, Alpena, MI Strat unit: Four Mile Dam formation Submitter notes: Identification of this specimen is based on a 1876 publication by Rominger. The coral is 10.5 cm tall. Photo title: Coral Taxa present: Striatopora rugosa View full record
		Michelinoceras anguliferum alpenense	Newton Creek formation	Mary Ann Szwabowski
	Submitted on 2021-02-17 by Mary Ann Szwabowski Location (approximate): Alpena, Alpena, MI Strat unit: Newton Creek formation Submitter notes: The siphuncle of this cephalopod is visible in the upper right photo Photo title: Nautiloid Cephalopod Taxa present: Michelinoceras anguliferum alpenense View full record
		Pithocrinus cooperi	Alpena formation	Mary Ann Szwabowski
	Submitted on 2021-02-20 by Mary Ann Szwabowski Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: Speciman collected by Mike Palescuk Photo title: Crinoid Taxa present: Pithocrinus cooperi View full record
		Dolatocrinus	Alpena formation	Mary Ann Szwabowski
	Submitted on 2021-02-20 by Mary Ann Szwabowski Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: None Photo title: Crinoid Calyx Taxa present: Dolatocrinus View full record
		Dolatocrinus asterias	Alpena formation	Joseph Koniecki
	Submitted on 2021-06-24 by Joseph Koniecki Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: Crinoid calyx with crinoid holdfast attached to tegmen. Photo title: Crinoid calyx Taxa present: Dolatocrinus asterias View full record
		Dolatocrinus asterias	Alpena formation	Joseph Koniecki
	Submitted on 2021-06-24 by Joseph Koniecki Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: None Photo title: Crinoid crowns Taxa present: Dolatocrinus asterias View full record
		Dolatocrinus stellifer	Alpena formation	Joseph Koniecki
	Submitted on 2021-06-24 by Joseph Koniecki Location (approximate): Alpena, Alpena, MI Strat unit: Alpena formation Submitter notes: Crinoid calyx with exquisite tegmen. Photo title: Crinoid calyx Taxa present: Dolatocrinus stellifer View full record

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