Region 1: EPA New England
Halfway Brook - Invertebrates
| Invertebrates | Estimated Count* |
|---|---|
| Acentrella | 480 |
| Agnetina | 60 |
| Apatania | 60 |
| Atrichopogon | 60 |
| Attenella | 240 |
| Baetidae | 360 |
| Baetis | 180 |
| Bezzia/Palpomyia | 240 |
| Ceraclea | 120 |
| Chironomidae (pupae) | 360 |
| Cricotopus/Orthocladius | 180 |
| Drunella | 60 |
| Elmidae | 180 |
| Ferrissia | 120 |
| Gyraulus crista | 60 |
| Heptageniidae | 900 |
| Hexatoma | 60 |
| Hydrachnida | 60 |
| Hydropsyche | 240 |
| Hydroptilidae | 60 |
| Isonychia | 60 |
| Leptophlebiidae | 300 |
| Leuctridae | 780 |
| Lumbriculidae | 120 |
| Microtendipes pedellus grp. | 480 |
| Nematoda | 60 |
| Optioservus | 720 |
| Orthocladius | 300 |
| Pisidium | 60 |
| Polypedilum aviceps | 300 |
| Potthastia gaedii grp. | 60 |
| Promoresia | 120 |
| Pteronarcys | 60 |
| Rheotanytarsus | 180 |
| Rhyacodrilus | 420 |
| Rhyacodrilus coccineus | 60 |
| Stempellinella | 120 |
| Sublettea | 120 |
| Tanytarsus | 3660 |
| Thienemannimyia grp. | 120 |
| Tubificid immature: bifids | 60 |
| Tvetenia bavarica grp. | 60 |
*Estimated number based on a subsampling multiplier.
Total stream area sampled is 4 square meters.