| Graptolithoidea: Order Graptoloidea |
Gerhard REGNELL (1949) wrote:
"The graptolites - and here reference is made rather to the Graptoloidea than to the
dendroid forms - are usually thought of as animal stocks of small or moderate size. Many
of them measure only 10 mm, or even less, and such forms as reach 100-150 mm in length
may claim to be desired as "very long". These are found e.g. in certain Diplograptids, such
as Diplograptus longissimus Kurck (length of rhabdosome amounting to more than 160 mm;
Kurck 1883, p. 302) and in the Didymograptids, but especially in the Monograptids."
Maximum length of Monograptus rhabdosomes is given within brackets:
Lower Ludlovian: M. scanicus (>150 mm)
Upper Wenlockian: M. flemingi (>800 mm)
M. testis (>340 mm)
M. flexilis ( 240 mm)
Lower Wenlockian M. priodon (>300 mm)
Gala-Tarannon: M. priodon (>300 mm)
M. acus (>160 mm)
M. spinulosus ( 160 mm)
Llandoverian: M.? sedgwicki (>200 mm)
"In his [...] book on "Das mittel-deutsche Graptolithenmeer", R. Hundt (1939, pp.
193-197) devotes a chapter to the size of graptolites from Middle Germany. From the
great length of many incomplete graptolite rhabdosomes he concludes that specimens
reaching a length more than 1 m must have occured not only in Monograptus flemingi but
e.g. in M. priodon, M. lobiferus, and M.? sedgwicki."
___________________________________________________
Source:
Regnell, G. 1949. On large-sized rhabdosomes in Monograptids. - Kungl. Fysiografiska Söllskapets I Lund
Förhandlingar 19, 12, 1-11.
"The graptolites - and here reference is made rather to the Graptoloidea than to the
dendroid forms - are usually thought of as animal stocks of small or moderate size. Many
of them measure only 10 mm, or even less, and such forms as reach 100-150 mm in length
may claim to be desired as "very long". These are found e.g. in certain Diplograptids, such
as Diplograptus longissimus Kurck (length of rhabdosome amounting to more than 160 mm;
Kurck 1883, p. 302) and in the Didymograptids, but especially in the Monograptids."
Maximum length of Monograptus rhabdosomes is given within brackets:
Lower Ludlovian: M. scanicus (>150 mm)
Upper Wenlockian: M. flemingi (>800 mm)
M. testis (>340 mm)
M. flexilis ( 240 mm)
Lower Wenlockian M. priodon (>300 mm)
Gala-Tarannon: M. priodon (>300 mm)
M. acus (>160 mm)
M. spinulosus ( 160 mm)
Llandoverian: M.? sedgwicki (>200 mm)
"In his [...] book on "Das mittel-deutsche Graptolithenmeer", R. Hundt (1939, pp.
193-197) devotes a chapter to the size of graptolites from Middle Germany. From the
great length of many incomplete graptolite rhabdosomes he concludes that specimens
reaching a length more than 1 m must have occured not only in Monograptus flemingi but
e.g. in M. priodon, M. lobiferus, and M.? sedgwicki."
___________________________________________________
Source:
Regnell, G. 1949. On large-sized rhabdosomes in Monograptids. - Kungl. Fysiografiska Söllskapets I Lund
Förhandlingar 19, 12, 1-11.
| ___________________________________________________________________________________________________________________________ Graptolite Net is edited and periodically updated by Dr Piotr Mierzejewski, the Count of Calmont & Countess Maja Korwin-Kossakowska It is free for all users and is entirely not-for-profit. Online since 2002. |
| SCIENTIFIC PORTAL FOR USERS INTERESTED IN PTEROBRANCHS AND GRAPTOLITES |
| Graptolite Net | Index | Cephalodiscoidea | Rhabdopleuroidea | Crustoidea | Camaroidea | Tuboidea | Dendroidea | Graptoloidea |
| Large-sized rhabdosomes in monograptids |
| Visit related page: GIANT MONOGRAPTUS FLEMINGI |