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Baltograptus

Pterobranchia - Graptoloidea - Didymograptidae

Synonymy list
YearName and author
1994Baltograptus Maletz p. 36
2011Baltograptus Rushton p. 322
2013Baltograptus Maletz and Slovacek p. 1113
2020Baltograptus Lo Valvo et al. p. 539

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumHemichordataBateson 1885
RankNameAuthor
classPterobranchiaLankester 1877
subclassGraptolithina(Bronn 1849)
orderGraptoloideaLapworth 1875
familyDidymograptidaeMu 1950
genusBaltograptusMaletz 1994

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Baltograptus Maletz 1994
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†Baltograptus deflexus Elles and Wood 1901
†Baltograptus extremus Maletz and Slovacek 2013
†Baltograptus geometricus Törnquist 1901
†Baltograptus jacksoni Rushton 2011
†Baltograptus kurcki Törnquist 1901
†Baltograptus minutus Törnquist 1879
†Baltograptus vacillans Tullberg 1880
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Invalid names: Baltograptus kunmingensis Ni 1979 [synonym]
Diagnosis
ReferenceDiagnosis
A. W. A. Rushton 2011“Horizontal to deflexed, declined and pendent didymograptids; sicula slender, with long supradorsal part; proximal development of isograptid or artus type with moderately low origin of th11 from metasicula(?) and comparably long ventral free apertural length of sicula; isograptid suture very short or missing”.
J. Maletz and M. Slovacek 2013Horizontal to deflexed, declined and pendent didymograptids; sicula a slender, slowly widening cone with long supradorsal part; proximal development of isograptid type or artus type with moderately low metasicular origin of th11 and comparably long ventral free apertural length of sicula; isograptid suture very short or missing (artus type development); stipe width and thecal overlap variable, increasing thecal length leads to higher overlap; thecae straight to undulating in shape; apertures simple and without extended rutellum (emended from Maletz 1994).
G. A. Lo Valvo et al. 2020Horizontal to deflexed, declined, and pendent didymograptids; sicula slender,
with long supradorsal portion; proximal development of isograptid or artus type with moderately low origin of th1(1) from metasicula and comparably long free ventral apertural length of sicula; isograptid suture very short or missing.
Measurements
No measurements are available
Composition: "sclero-protein"c
Locomotion: passively mobileo
Life habit: planktonico
Diet: suspension feedero
Vision: blindc
Created: 2004-02-28 15:07:12
Modified: 2009-05-19 07:15:15
Source: o = order, c = class
References: Aberhan 1992, Aberhan et al. 2004

Age range: base of the Arenigian to the top of the Caradoc or 478.60000 to 449.50000 Ma

Collections (34 total)


Time interval Ma Country or state Original ID and collection number
Tremadocian485.4 - 477.7Morocco (Anti-Atlas) B. vacillans, B. geometricus (166727)
Early/Lower Ordovician485.4 - 470.0Argentina (Jujuy) B. deflexus (220277) B. deflexus, B. extremus (220274) B. vacillans, B. geometricus (220275)
Hunneberg481.1 - 474.8Russian Federation (Yaroslavl Oblast) Didymograptus geometricus (235882)
Arenigian478.6 - 468.1Argentina (Salta) B. vacillans, B. geometricus (235349)
Arenigian478.6 - 468.1Argentina (Jujuy) B. vacillans (220315 220316) B. vacillans, B. geometricus (220304 220317) B. vacillans, B. kunmingensis (220318) B. vacillans, B. minutus (220308)
Arenig478.6 - 466.0Argentina Didymograptus deflexus (8777 9009 9012 9022)
Arenig478.6 - 466.0Australia (Queensland) Didymograptus vacillans (197369)
Arenig478.6 - 466.0Bolivia (Tarija) B. minutus (57172)
Moridunian477.7 - 473.8Bolivia B. deflexus, B. minutus (90413)
Floian477.7 - 470.0Morocco (Anti Atlas) B. vacillans, B. geometricus (166726)
Floian477.7 - 470.0Argentina (Catamarca) B. spp. (145599 145600)
Floian477.7 - 470.0Russian Federation (Siberia) Corymbograptus deflexus (205382)
Floian477.7 - 470.0Argentina (Jujuy) B. geometricus (220287) B. vacillans (220286)
Yapeenian470.3 - 467.3New Zealand Didymograptus deflexus (63326 63327 63331 63370)
Castlemainian470.0 - 470.3New Zealand Didymograptus deflexus (63284)
Dapingian470.0 - 467.3Russian Federation (Siberia) Corymbograptus deflexus (205387 205563)
Darriwilian467.3 - 458.4Russian Federation (Siberia) Corymbograptus deflexus (205561)
Caradoc458.4 - 449.5Canada (British Columbia) Didymograptus deflexus (25170)