Same reason we don't find transitional fossils ANYWHERE? But yet you blindly claim the exist with your "just so" stories and armies of "might haves" and "could haves".
You will find them you just have to go beyond the myths in the Bible:
Transitional Vertebrate Fossils FAQ: Part 1A
Transitional Vertebrate Fossils FAQ: Part 1A
Transitional Vertebrate Fossils FAQ: Part 1A
Transitional Vertebrate Fossils FAQ: Part 2A
More here:
Transitional Vertebrate Fossils FAQ
CC200: Transitional fossils
Creation Science Rebuttal, Transitional Fossils
Devonian tetrapods (limbed vertebrates), known from an increasingly large number of localities, have been shown to be mainly aquatic with many primitive features. In contrast, the post-Devonian record is marked by an Early Mississippian temporal gap ranging from the earliest Carboniferous (Tournaisian and early Viséan) to the mid-Viséan. By the mid-Viséan, tetrapods had become effectively terrestrial as attested by the presence of stem amniotes, developed an essentially modern aspect, and given rise to the crown group. Up to now, only two localities have yielded tetrapod specimens from the Tournaisian stage: one in Scotland with a single articulated skeleton and one in Nova Scotia with isolated bones, many of uncertain identity. We announce a series of discoveries of Tournaisian-age localities in Scotland that have yielded a wealth of new tetrapod and arthropod fossils. These include both terrestrial and aquatic forms and new taxa. We conclude that the gap in the fossil record has been an artifact of collection failure.
http://www.pnas.org/content/109/12/4532.full?sid=bf5700fe-031f-4289-baa4-b8f3de8982d7
So what was that about no transitional fossils? You are wrongly assuming that because there are gaps in the fossil record that there were no transitional fossils which is an illogical conclusion.
Like I said, "might haves" and "could haves" with NO REAL EVIDENCE.
It is odd that in spite of your OCD-like inspired (religiously inspired) denial of the science literature, transitional fossils are well documented. Your insistence that even the existence of fossil evidence is the result of a global conspiracy is just more of the sad, diseased musings of the YEC'ist mindset.
The Panda's Thumb: Search Results
As we all know, Tiktaalik roseae (Tiktaalik roseae: Home) is a magnificent example of a transitional fossil connecting aquatic crittersfishwith tetrapods, 4-limbed critters. Nevertheless, there are still gaps in that transitional sequence. A recent PNAS paper (link to abstract; full paper is behind a paywall) describes fossils of early amphibians that are later than Tiktaalik and are within Romers Gap. Romers Gap is a period around 15 million years long, from roughly 360mya to 345mya, where (up to now) there was a distinct lack of fossils of proto-tetrapods or related critters. The new PNAS papers senior author is Jenny Clack, one of the most prominent paleontologists studying that era, (along with people like Neal Shubin and Per Ahlberg. Per was an active commenter on the late lamented Internet Infidels Discussion Board way back when I was an administrator of IIDB.
With these new fossils, the transition from water to land animals is becoming nearly as well documented as the synapsid to mammal transition. Nobel Intent (New fossil finds filling in history of tetrapods | Ars Technica) has more on the new paper.