T or F a)Quadrula and Radiatula each have glochidia that are unhooked – this must be a result of convergent evolution (e.g. homoplasy). b)The common ancestor of Parreysiinae mussels definitely had 'Unhooked' glochidia. c)Note that Mytilus, Mercenaria, and Neotrigonia are mussels that do not have glochidia larvae - they still have larvae, but they are distinct from the other taxa in this tree. Given this, it is unlikely that the common ancestor of all mussel taxa represented in this tree had glochidia larvae.
T or F a)Quadrula and Radiatula each have glochidia that are unhooked – this must be a result of convergent evolution (e.g. homoplasy). b)The common ancestor of Parreysiinae mussels definitely had 'Unhooked' glochidia. c)Note that Mytilus, Mercenaria, and Neotrigonia are mussels that do not have glochidia larvae - they still have larvae, but they are distinct from the other taxa in this tree. Given this, it is unlikely that the common ancestor of all mussel taxa represented in this tree had glochidia larvae.
Chapter13: Nerves Of Steel
Section: Chapter Questions
Problem 3FITB
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Question
T or F
a)Quadrula and Radiatula each have glochidia that are unhooked – this must be a result of convergent evolution (e.g. homoplasy).
b)The common ancestor of Parreysiinae mussels definitely had 'Unhooked' glochidia.
c)Note that Mytilus, Mercenaria, and Neotrigonia are mussels that do not have glochidia larvae - they still have larvae, but they are distinct from the other taxa in this tree. Given this, it is unlikely that the common ancestor of all mussel taxa represented in this tree had glochidia larvae.
Transcribed Image Text:Glochidia morphology (shape)
Mytilus
Mercenaria
Neotrigonia
Velesunio
Hyridella
Castalia
Triplodon
Etheria
Chambardia
Lamproscapha
Mar. margaritifera
M. monodonta
Lamell. corrianus
L. generosus
Parreysia olivacea
P. tavoyensis
Coelatura
Oxynaia
Scabies
Radiatula
Unio
Lasmigona
Pyganodon
Quadrula
Amblema
Lampsillis
Truncilla
Potamilus
Contradens sp.
Trapezoideus
I
Gonidea
Potomida
Lamprotula
Pronodularia
Pilsbryoconcha
Pseudodon cumingii
P. mouhtii
●▬▬
▬▬
▬▬
☐☐☐☐
n
Lasidia hooked
▬▬▬
L
▬▬▬
▬▬▬
☐☐☐
☐☐☐☐☐
Ensidens
☐☐☐☐
Contra. contradens ▬▬ ▬▬
☐☐☐☐☐
J
oo
looke w/ spine
JL
▬▬▬
▬▬▬▬ ¯¯
☐☐☐
??????
P. inoscularis
??????
P. vondembushianus 700
P. cambodjensis
▬▬▬▬▬
Axe-head shaped
Asymmetrical
Hyriidae
Lasidium-bearing
Mussels
Margaritiferidae
Parreysiinae
Unioninae
Ambleminae
Rectidentinae
Gonideinae
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