Current position as stated by Supervisor is Part Time On Call employee.
Previously (2 years) my roll included logistics duties along with PTOC status. At some point evidently the logistics duties were removed from my responsibility and I was never informed of the change. My hours were recorded as usual for the last 2 pay periods and when my payroll deposit was much less than I expected I contacted the Supervisor. She stated, she deleted the hours and I would not be paid. Several emails back and forth and no resolution, last statement finally details job description that does not include logistics.
Can the supervisor delete hours without notice? Do I have any recourse?

No. If you actually worked those hours, then you have to be paid for them. It is very illegal to tamper with a time card, either way. Have you gone to HR about this?

Thank you for the response! Have not contacted HR at this point working on getting my head around this and gathering as much information as I can to make the best presentation. Not very confident or sure how to broach the subject with HR. Do I provide the email discussion with the supervisor in my initial contact or let HR take the lead. I have a screen shot of the last pay period hours deleted do not have a copy of the previous pay period hours. Did ask supervisor for a copy of the hours deleted and she would not or could not provide them.

How are yours recorded? If you have proof you worked the hours and they are reflected in your paycheck, then that's what you report to HR. If your proof consists of the e-mails then show that.

Will let you know how this works out. Again, thank you for your thoughts. If you think of anything else to ad please let me know!

It is up to you to just do it and get it over with. It is money not in your pocket so you have to find a resolution on why that happened and get it back. My pay is based on time sheets; if I am missing anything, then I want to know why, when I worked those hours. Your supervisor has no status to delete hours recorded on your timecard. I hope you have saved all e mails so you can backtrack on this. Is she covering her tracks for something she was supposed to do and didn't record it or inform you ?

Update:
Waiting on reply from HR. Contacted them 4 weeks ago with request of a copy of hours deleted and to be paid for the hours deleted.
Email again this week and received a auto response that the HR Rep was out of the office.
Frustrating...